Cheapest VoIP Providers: Top Cheap Phone Plans For UK Businesses

headsets hanging on display screen monitors for VoIP calling

The cheapest VoIP plan for UK businesses is Virtual Landline at £6.95 per user, per month. It’s a stripped-back, mobile and desktop cloud phone that covers the essentials, which makes sense if you just need a single professional business number and basic call handling, without paying for a full unified communications suite.

With the UK’s PSTN switch-off scheduled for January 2027, sticking with legacy landlines is now a business risk. Opting for the cheapest Voice over Internet Protocol (VoIP) plan can be a smart upgrade here, but only if the plan’s fine print (such as contract terms, minimum users, add-ons and number porting) makes sense for your team.

In our guide, we’ve found the lowest-cost plans from trusted VoIP providers we’ve researched and tested, flagging the extra costs that typically change the listed monthly price, like metered outbound minutes, paid call recording, CRM integrations and hardware restrictions.

The 6 cheapest VoIP providers in the UK

  1. Virtual Landline Office Lite £6.95 per user, per month (one number, no user limit)
  2. bOnline Starter £7 per user, per month
  3. Google Voice Starter £7.35 per user, per month* (up to 10 users)
  4. RingCentral Essentials £7.99 per user, per month (price for two to 19 users, 19 users maximum)
  5. NBC Call Centre Basic – £9.99 per user, per month (25+ users minimum)
  6. Vonage Express – £10 per user, per month

Based on our research, these are the providers we recommend. Clicking on them will take you to our plan-matching tool, which will help identify the best service for your business. If you want to find out how we ranked these providers, read our research criteria.

* Google Voice pricing is only available in USD (converted to GBP); you must be a Google Workspace user which costs an additional fee.

Why Should You Trust Us? Our Research Methodology

At Expert Market, we use an independent, user-led testing process to assess business VoIP providers for UK SMEs.

For this guide, we hands-on tested several leading VoIP providers and compared them using the same core criteria: call handling, communication channels, training tools, pricing and value, integrations, hardware options, customer support, and security.

Ultimately, we ranked each plan by its lowest listed price per user, per month, so you can find the cheapest VoIP plans more easily.

We keep this page updated as plans and features change. Read our full cheap VoIP review methodology for a more detailed breakdown of how we test and score providers.

Cheapest VoIP Providers: Expert’s Summary

The true cost of a cheap provider often only reveals itself when you try to leave. While the law says you own your business number, the administrative friction of porting a number away from a budget service can be difficult.

My advice is to:

  1. Test a budget provider with a temporary number for at least a month before moving your main business line over. Use that trial to assess call quality and the responsiveness of their support team.
  2. Send a test ticket asking a technical question and time how long it takes to get a useful reply. If the support feels flaky during the trial, imagine how it will feel during a porting dispute.
  3. If the call quality or the mobile app feels clunky, you can walk away without risking your main line going dead.

I’d also keep a keen eye on calling allowances. Some cheap provider plans cost less per month, but come with variable per-minute pricing, such as Virtual Landline Office Lite.

Others have included minutes, but those limits can be fairly small or are limited to landlines rather than mobiles. Assess who your business calls and how often to work out which cheap provider will actually stay cheap in the long run.

Richard Sutherland, info-tech lecturer and experienced call centre manager
Richard Sutherland Info-tech lecturer and experienced call centre manager

1. Virtual Landline Office Lite: Cheapest VoIP Plan for UK Businesses

Virtual Landline Office Lite is the cheapest VoIP plan we found for UK businesses at £6.95 per user, per month (undercutting our previous cheapest UK option, bOnline Starter), and it’s built for small teams that want a modern phone system without paying for unnecessary features they won’t touch day-to-day.

You’ll have a 12-month contract minimum, which then moves to a 30-day rolling contract, thereafter.

Office Lite is designed around one main business number that can be used by multiple people via extensions (so you can still route calls to different users). It also uses per-minute pricing and minute bundles, depending on what you agree to.

If you need a direct dial number for each user and unlimited calls to UK landlines (plus, 1,000 minutes to mobiles), Virtual Landline’s Office Complete package is a better fit, for a still low-cost £9.95 per user, per month.

virtual landline logo
Virtual Landline Office Lite
Pricing £6.95/user/month
Strengths

Very simple setup for essentials (users, numbers, timeframes, queues)

Flexible call flows (auto attendant and dialpad menus, ring groups/queues, routing rules) with effective call recording and voicemail to email

Useful scheduling controls (business hours and bank-holiday/holiday timeframes)

Weaknesses

Only one office number/account, meaning it's not the right pick if you need every user to have their own direct line

No voicemail transcription (and no built-in AI layers)

Contact records are basic (e.g. no email field), which can be limiting for CRM-style workflows

Pricing
PlanStarting price/user/month
Office Lite £6.95
Office Complete £9.95
Call Centre £14.95

What does Virtual Landline Office Lite do well?

  • Gives you a credible business number fast: Virtual Landline positions Office Lite as a new local or national phone number setup with mobile apps, which suits sole traders and tiny teams trying to look established without buying desk phones.
    • Notably, Office Lite doesn’t come with the 25-user minimum barrier that makes NBC Call Centre Basic a non-starter for many small businesses.
call incoming virtual landline
When you receive a call via Virtual Landline, it'll pop-up like this on a web browser or you'll get a notification by your operating system (like that in the bottom right-hand corner) if you have the app installed. Source: Matt Reed/Expert Market
  • Simple call handling that feels fitted to businesses: The core value is basic call control with call queues, routing, caller ID, music on hold and voicemail-to-email all included, so callers don’t hit a dead end when you’re busy.
  • Multi-user on one office line (extensions): If your goal is to have one number customers remember, but with multiple people answering the phones, Virtual Landline’s multi-user model supports that through extensions, which is a sensible way to keep costs down while still separating responsibility internally (separate numbers will cost more with VoIP providers).
call history panel in virtual landline
In your call history, on the web version of Virtual Landline, you'll be able to see call details, and listen to call recordings (if enabled) and voicemails. Source: Matt Reed/Expert Market
  • Quick, low-friction day-to-day admin: In my hands-on testing, adding a contact and confirming it exists in the directory was extremely straightforward (a couple of clicks inside the desktop app). That matters because cheap tools often hide basic actions behind clunky menus.
  • Bandwidth guidance is refreshingly clear: Virtual Landline’s published recommendation is at least 1Mbps dedicated per 10 phone lines. It’s not a perfect rule for every network, but it’s a useful quality control for small teams before switching from landlines.
creating a contact
Creating a contact in Virtual Landline couldn't be simpler. Source: Matt Reed/Expert Market

Are there any downsides to Virtual Landline Office Lite?

  • You do not get a direct number per user on the cheapest tier: Office Lite can run multiple users via extensions, but Virtual Landline only offers a unique number for every user as an Office Complete (and higher) benefit. If your staff need direct inbound lines (sales, account managers, duty phones), you may need to budget for the upgrade.
  • Minute bundles aren’t as baked in as rivals: Virtual Landline’s bundled minutes are associated with higher tiers, with Office Lite instead involving per-minute pricing or minute bundles depending on your setup. That means the cheapest seat price can become less cheap for outbound-heavy teams.
  • Lightweight feature depth: This is a ‘do the basics well’ type of plan. In testing, call quality was perfectly fine (no obvious improvement or drop versus other providers), but the experience is deliberately stripped back in terms of user interface and feature depth. That’s good for speed, less good if you want deeper analytics, richer admin controls or automation.
    • You can’t upgrade on a per-feature basis like bOnline Start either, which makes it a little less flexible if you only need specific features improved upon.
    • Vonage Express is often the most feature-rich option of the best cheap plans discussed on this page.
virtual landline voicemail to email
While not a fully-fledged comms suite, Virtual Landline has handy features, such as voicemail-to-email, which worked effectively, sending the recording attached to the email so I could listen directly in a browser or on my phone after just a couple of minutes. Source: Matt Reed/Expert Market
  • No voicemail transcription in my testing: When I tested the platform, voicemail transcription wasn’t available (albeit, I’ve been told it’s a feature Virtual Landline is working on), which can be a real time-saver for busy owners who triage messages between meetings.
    • If transcription is a must-have, compare against plans that include it by default, such as Google Voice Starter, which has that and other AI-based time savers.
  • Contract commitment is longer than month-to-month budget tools: A 12-month minimum term is normal in UK business telecoms, but it’s still a meaningful constraint for new businesses that want maximum flexibility while they stabilise.

What businesses is Virtual Landline Office Lite best for?

Best for: UK sole traders and microbusinesses that want a cheap main office number with basic routing and queueing, and are happy using extensions rather than paying for a separate inbound number per user.

Not ideal for: Teams that need a direct dial number for every staff member on the cheapest plan, or any business with heavy outbound calling that wants bundled minutes clearly included in the base price.

2. bOnline Starter: Cheapest UK VoIP Plan for Heavy Inbound Calling

bOnline Starter is one of the cheapest VoIP plans for UK businesses at £7 per user, per month (+ VAT) on a 12-month contract.

It’s built around unlimited inbound calling, but it hard-caps outbound use at 100 UK landline minutes per user, per month, meaning it’s a cost-saver for inbound-first setups (such as business support lines) rather than dial-heavy teams (such as estate agents or recruiters).

Importantly, unlike Virtual Landline, each user gets their own dedicated number, too, which can be more practical for certain teams.

bOnline logo
bOnline Starter
Pricing £7/user/month
Strengths

Cheapest monthly cost of all provider plans

Extensive calling and communication tools

Impressive range of positive customer reviews

Weaknesses

CRM and Helpdesk integrations cost an extra £5 per month

Missing multi-factor authentication, compromising your operation’s security

Not compatible with all phone brands

Pricing
All bOnline plansStarting price (per user, per month)Inbound communication featuresOutbound communication features
Starter £7 Call routing, call forwarding, music on hold 100 minutes of outbound calls per month, high definition (HD) voice, extension dialling
Unlimited Calling £13.95 1-1 HD video meetings, on-demand call recording, call monitoring, call queues Unlimited UK minutes per user, 1-1 onboarding
Unlimited Calling + Handset £16.95 Same as Unlimited Calling plan Same as Unlimited Calling + includes VoIP desk phone

What does bOnline Starter do well?

  • Handles inbound calls properly at a low price, across both mobile and desktop apps.
    • Call queues are included, so callers aren’t dumped into missed calls when you’re busy.
call incoming on bOnline software
When you receive a call, it pops up on screen. Source: Matt Reed/Expert Market
    • You can set business hours and holiday dates, then route calls accordingly for any out-of-hours callers.
    • You get a professional welcome greeting and hold music, small touches that stop your business from sounding cheap.
    • Paired with routing controls, interactive voice response capabilities are included in bOnline Starter, so callers can reach the channels they want to with speech alone.
bonline call flow
Inside the web version of bOnline you can configure call flows, as shown here in a simple manner, or dive into its advanced call menu for further configuration. Source: Matt Reed/Expert Market
  • It’s simple to operate day-to-day. When I tested bOnline’s web app, setup was quick, the navigation was clean, and key actions (adding users, building basic routing, managing voicemail behaviour) were easy to find without digging through settings.
bonline web app bulk import contacts section
bOnline's bulk import feature is handy, so long as you format your contacts correctly. Source: Matt Reed/Expert Market
  • More ‘team-ready’ than ultra-minimal, cheap plans. If a cheaper plan only really works as a single-line setup, bOnline Starter is the one you pick when you want a low price and a small-business phone system you can grow into.
    • That’s because each user gets a direct line, unlike Virtual Landline Office Lite.
    • You also customise your Starter package with add-ons, such as CRM integrations (more than 200 ready-made options) and call recording. Other providers don’t allow this. For instance, RingCentral requires users to purchase its Premium plan for CRM integrations, which costs between £17.99 (100 users or more) and £24.99 (one user) per user, per month.
    • You also get video and audio conferencing to chat with your team internally. With competitors such as NBC Call Centre Basic and Vonage Express, video calling isn’t included at all.

Are there any downsides to bOnline Starter?

  • The outbound minutes cap is a deal-breaker for many teams.
    • You get 100 outbound UK landline minutes per user, per month, which won’t be enough for sales, bookings, recruitment, or any customer-facing team doing regular outbound. You’d need to pay an extra £6.95 per user/month with bOnline (albeit for a still competitive £13.95 per user, per month) for the pleasure.
    • If staff call mobiles a lot, you’ll hit the ceiling even faster (and you’ll end up upgrading sooner than planned).
  • Starter is not a full collaboration suite.
    • There’s no native team messaging, like RingCentral Essentials, so you may need a separate chat tool.
    • It’s also missing several other layers you’d expect once you’re serious about performance tracking, such as call recording, forwarding and voicemail, call reports and HD video screen-sharing, plus integrations with Microsoft or Google Workspaces.
  • Hardware flexibility is limited. If you want desk phones, you’re operating inside bOnline’s supported ecosystem, which is essentially only Yealink models. As such, this is not the best option for businesses migrating a mixed bag of existing handsets.
  • Support coverage isn’t built for 24/7 businesses. If your line going down on a weekend is an emergency scenario, this is a weak point versus providers that prioritise round-the-clock support.
    • Instead, bOnline offers Monday to Friday, 9am to 6pm, and Saturday, 10am to 2pm, with no available support on Sundays.

What businesses is bOnline Starter best for?

  • Best for: Sole traders and small teams that are inbound-heavy (services, clinics, local trades, studios) and want a professional call experience on the cheapest possible monthly spend.
  • Also good for: Teams that want basic routing and queues now, and can add more capability later, without jumping straight into £20 or more per-user plans.
  • Not ideal for: Outbound-heavy teams (sales, recruiters), organisations that require deep analytics and coaching, or anyone who needs maximum hardware freedom and 24/7 safety-net support.

3. Google Voice Starter: Best Cheap VoIP Plan for Unlimited Calling

Google Voice Starter is a Google Workspace add-on for teams of up to 10 users, and it’s one of the few cheap options that can remove outbound-minute anxieties.

Google states that calls to most European countries from within Europe (including the UK) are included, so you’re not constantly counting minutes like you are on bOnline or Virtual Landline. This doesn’t apply to all number types, however, so you’ll still need to be careful, but UK landlines and mobiles are listed as cost-free.

google voice logo
Google Voice Starter
Pricing $10 (£7.35)/user/month
Strengths

Unlimited calling minutes (a rarity for cheap plans)

Fantastic tools for Google users via Google Workspace

Top-rated security features

Weaknesses

Difficult to integrate with other non-Google systems

Customer support is quite restricted compared with other providers

Limited range of call management or coaching features

All Google Voice Plans and Pricing
PlanPrice (per user, per month) (converted from USD$)Inbound communication featuresOutbound communication features
Starter £7.35 (max 10 users) Calls between Google Voice numbers, voicemail transcription, multi-level auto attendant, ring groups, eDiscovery for calls, voicemails, and text messaging records Unlimited calls to the US and Canada, calls to most European countries from within Europe
Standard £14.71 (unlimited users) Ad-hoc user call recording SIP link, ring groups, desk phone and ATA support, eDiscovery for calls, voice mails and text messaging records
Premier £22.06 (unlimited users) Automatic call recording Advanced reporting (BigQuery)

*Google Voice pricing structure uses USD ($). However, we have converted these values to British Pounds (£) for ease of comparison. Pricing correct as of March 2026.

How much is Google Voice with Google Workspace in 2026?

While the above prices for Google Voice plans are correct, since Google Voice is an add-on for Google Workspace, you need to purchase a Google Workspace license to use it.

Depending on your business needs, this can be a convenient integration, since you’ll have access to all Google-related tools, including Google Docs and Slides, and get your own Business Gmail account.

That includes Google Meet for 100 participants built in, which beats all other packages on this page for video comms features, and Google Chat for messaging colleagues.

If your business isn’t already using Google Workspace, here’s a quick look at its three cheapest plans and what each offers. And unlike Google Voice, there is a specific pricing structure in British Pounds (£) for UK businesses:

FeatureBusiness StarterBusiness
Standard
Business
Plus
Monthly price per user£5.90£11.80£18.40
Storage per user30GB2TB5TB
Video meeting participants100150500
Video meeting featuresBasicRecording
noise cancellation
Recording
attendance tracking
noise cancellation
Appointment booking pagesNoYesYes
Email layouts and mail mergeNoYesYes

Consequently, the cheapest Google (Workspace + Voice) package in 2026 is approximately £13.25 (£5.90 + £7.35) per month, depending on the current USD to GBP exchange rate.

What does Google Voice Starter do well?

  • Unlimited-style calling for UK and European usage. Google says calls to most European countries from within Europe are included, which makes this a stronger pick than bOnline Starter if your team calls across borders regularly.
  • Better financial sense for outbound-heavy teams than minute-capped rivals. If you’re comparing it directly to bOnline Starter, the difference is simple: Voice is built to avoid per-user outbound caps, while bOnline Starter’s minutes ceiling can force an early package upgrade for sales, bookings, recruitment and other outbound-heavy work.
  • Cleaner buying decision for Google-first businesses. If you already run on Google Workspace, Voice is designed to sit inside that ecosystem as an add-on for smaller teams (up to 10 users), rather than becoming another standalone comms vendor you have to govern and maintain separately.
Google voice integration options with Workspace
Google Workspace users should already know the integration potential between different Google apps possible with Google Voice. Source: Expert Market
  • Practical calling features: Voice Starter gives you the core stuff busy teams often use, such as call forwarding (not available with bOnline Starter) across devices, plus voicemail transcription for fast triage (not offered by Virtual Landline).
Google Voice voicemail
In Google Voice, you'll get a transcript of voicemail messages sent to your profile. Source: Expert Market
  • User-testing ease: In testing, the web interface felt self-explanatory, with key tools where you’d expect them, search worked reliably, and small UX touches (like contact/profile customisation) made day-to-day use feel less clunky than typical budget VoIP dashboards.
  • Appealing support: Google positions Voice with 24/7 support as part of the Workspace ecosystem, and has strong security measures you expect from a global corporation like Google. That is a meaningful advantage over budget UK providers with limited support hours on evenings, nights, and weekends, such as bOnline or NBC.
google voice contact profile setup showing a llama as the profile picture
Setting up the profile of a contact user in Google Voice, which is much simpler than some other software we've used, especially for those well acquainted with Google products. Source: Expert Market

Are there any downsides to Google Voice Starter?

  • Starter is not the full phone system tier. Key small-business phone system tools like ring groups and a multi-level auto attendant sit on higher Voice tiers, not Starter.
    • If your cheapest-plan requirement is for one main number, multiple teams, and smart routing and call management controls, bOnline Starter or Virtual Landline will usually feel more PBX-like from day one.
  • Not every UK number type is included in unlimited. As stated earlier, standard UK calling shows as £0.00 per minute (landlines and mobiles) with Google, but several common non-geographic and premium types are billed separately. For instance:
    • UK personal numbers: £0.174 per minute
    • UK shared-cost numbers: £0.109 per minute
    • UK universal access numbers: £0.015 minute
    • UK pager: £0.116 per minute
  • Your true cost includes Google Workspace, and billing terms vary. Voice is a Workspace add-on, so you’re stacking costs, and Workspace pricing can be bought as flexible month-to-month or with a one-year commitment, depending on what you choose.
    • If you already need Workspace, this will work well. But if you don’t, it won’t make sense to purchase Google Workspace only to use its phone service.
  • A hard ceiling at 10 users on Starter. If you’re already at (or quickly approaching) 11+ or more seats, you’re effectively shopping Voice Standard/Premier (or a different provider) before you’ve even started.

What businesses is Google Voice Starter best for?

  • Best for: Small UK teams already on Google Workspace that make frequent outbound calls (including to European clients) and want to avoid minute-caps as a growth tax.
  • Also good for: Lean owner-led businesses that want a predictable calling setup without adopting a full UCaaS suite (team messaging, deep analytics, coaching tools) on day one.
  • Not ideal for: Inbound-heavy operations that need queues, departments, ring groups, and multi-level IVR routing on the cheapest tier — or any business that needs more than 10 users immediately.

4. RingCentral Essentials: Best Cheap VoIP For Future Scalability

RingCentral Essentials is the cheapest way into RingCentral’s ecosystem, offering a business phone system that you can scale into more advanced, world-leading plans later (its Ultimate plan is our highest-rated VoIP plan overall), without switching providers.

On Essentials, for the starting price of £7.99 per user, per month (two to 19 users), you get the core apps (desktop, mobile, browser), team messaging, document sharing, and call logs, plus 100 inclusive domestic and EMEA calling minutes per user.

The trade-off is that Essentials is light on call-handling depth. If you need IVR menus, audio and video conferencing, deeper analytics, or CRM integrations, RingCentral pushes you up to Standard or Premium.

RingCentral Logo on white background
RingCentral Essentials
Pricing £7.99 – £12.99/user/month
Strengths

Tightly integrated IVR and automatic call distribution (ACD), allowing you to leverage customer data

Rich menu of management features

Extensive help and support options

Weaknesses

Limited calling minutes compared with other providers

No CRM integrations on Standard plan

Needs RingCentral Engage to use power and auto dialler, predictive dialling, and custom call lists

All RingCentral Plans and Pricing
PlanPrice (per user, per month) (billed annually) Inbound communication featuresOutbound communication features
Essentials £7.99 – £12.99 Voicemail, basic call handling, including call forwarding and music on hold 100 inclusive minutes/user, mobile and desktop app calling
Standard £12.99 – £19.99 Enhanced call handling options such as multi-level auto attendant and call queues, voicemail-to-email, internet fax 750 inclusive minutes/user, call recording, unlimited audio conferencing, video meetings (up to 100 participants)
Premium £17.99 – £24.99 Advanced call handling like whisper and barge, multi-site administration and management, automatic call recording 2,000 inclusive minutes/user, developer platform for custom integrations, video meetings (up to 200 participants)
Ultimate £22.99 – £29.99 Premium features plus custom dashboards, KPIs, widgets 4,000 inclusive minutes/user, device status reports, device status alerts, unlimited storage

What does RingCentral Essentials do well?

  • It’s the most future-proof cheap plan. You can start lean, then upgrade into a much deeper platform (Standard/Premium) without a provider switch.
    • Virtual Landline Office Lite is cheaper, but it’s structurally a single-number setup. RingCentral is built around multi-user growth.
    • bOnline Starter gives you more small-business call handling features on day one, but RingCentral’s ceiling is higher when you’re ready to move beyond starter-type constraints.
  • Strong day-to-day usability. In our hands-on testing across providers, RingCentral’s admin environment is one of the easiest to navigate for basic setup and ongoing management, which matters when you’re trying to keep costs low by not needing paid support time.
ringcentral software showing a call in progress with dialpad
We found RingCentral to be a simple-to-understand software package in our hands-on testing. You can see us making a call here. Source: Expert Market
  • Team messaging and document sharing included. RingCentral’s cheapest tier includes real-time chat with team members, where you can share various file types across both iOS/Android apps, laptop and website versions of its software.
  • Unusually rich reporting tools. With Essentials, there’s also access to over 30 KPIs related to call volume, such as missed calls and average duration, alongside call log reports on user activity, adoption reports about how employees are using RingCentral products, and trend graphics.
RingCentral's calendar tool
RingCentral's integrated calendar tools make it easy to keep tabs on meetings and calls within the calling platform you are using. Source: Expert Market
  • 24/7 support is built into the RingCentral experience. That can be a real safety net for small businesses that can’t afford to have the line dead over a weekend.
    • bOnline’s limited weekend coverage is a genuine operational risk for businesses that treat telephony as business-critical.

Are there any downsides to RingCentral Essentials?

  • The calling allowance is capped. Essentials includes 100 domestic and EMEA calling minutes per user, plus 0 inclusive freephone minutes. If your team makes lots of outbound calls or you run an 0800 line, this gets expensive fast, unless you upgrade.
    • Google Voice remains the better pick for heavy calling teams because it’s built around unlimited calling value (even once you factor in Workspace).
  • Essentials is weak for proper call handling. The plan lacks the more useful queue routing and group handling features that small businesses actually need when they’re busy (overflow, routing options, ring groups, hunt groups sit higher up the stack).
    • bOnline Starter is the more phone-system-ready starter plan for inbound-heavy SMEs because queues and routing are meaningfully usable at the cheapest tier, while Virtual Landline Office Lite can be better value for a single number setup.
  • Many integrations you actually care about are paywalled. Essentials doesn’t give you the same value as RingCentral’s higher tiers for integrations. CRMs like Salesforce or Zendesk only come into play at the Premium level (£24.99 per user, per month) via RingCentral.
ringcentral app store for ready-made integrations
RingCentral has more than 500 ready-made integrations to use. Source: RingCentral website via Expert Market
  • There is no proper receptionist-style IVR on Essentials. RingCentral’s more advanced menu-building and automated receptionist experience is positioned above Essentials, so Essentials can feel bare if you want callers routed cleanly from day one.
  • There are no video meetings or audio conferencing on this tier. If you want your VoIP app to double as a lightweight collaboration hub, you’ll need to step up your plan to Premium.
    • bOnline Starter, Virtual Landline Office Lite and Google Voice Starter all include video calling in some capacity.

What businesses is RingCentral Essentials best for?

  • Best for: Small UK teams that want a cheap entry point but know they’ll need a more capable system later, and would rather upgrade plans than migrate providers.
  • Also good for: Businesses that operate outside a regular 9-to-5 and want 24/7 support coverage as a baseline safety net.
  • Not ideal for: Inbound-heavy teams that need proper queues and menus now, or outbound-heavy teams that will burn through 100 minutes per user quickly (you’ll end up upgrading early, which undermines getting a cheap plan today).

5. NBC Call Centre Basic: Cheapest VoIP For Larger Call Centres

NBC Call Centre Basic is built for one specific buyer: a 25 or more seat UK team that needs a call-centre style setup at a low headline rate.

It starts at £9.99 per user, per month (plus VAT), with a 25-user minimum, lets you keep your existing number and offers handsets from £5 per month (optional). However, no call package is included, so your monthly cost depends heavily on how much your team actually calls.

National Business Communications NBC Cloud VoIP solutions logo
NBC Call Centre Basic
Pricing £9.99/user/month
Strengths

Great value with no hidden fees and unlimited calling on Enterprise and Mobility plans

Call management features that compete with the best VoIP providers

Wide range of communication channels, including mass participant video calling

Weaknesses

Many call management features and video calling not available on cheapest plan

Notable lack of software integrations with popular CRM like Salesforce across all plans

Subpar training features compared with the advanced tools on RingCentral

All NBC Plans and Pricing
PlanStarting price (per user, per month) (billed annually) Inbound communication featuresOutbound communication features
Call Centre Basic £9.99 Music on hold, call forwarding, voicemail, voicemail-to-email Out of house management
Enterprise £17.99 Unlimited UK minutes, HD video conferencing, multi-site support, desktop app, Microsoft/Google integration Unlimited UK minutes, call recording, call reporting, call queues, call flows, HD video conferencing, desktop app
Complete Mobility £24.99 Messaging, mobile app, free basic desk phone on qualifying orders Messaging, mobile app, free basic desk phone on qualifying orders

What does NBC Call Centre Basic do well?

  • It’s one of the few cheap plan options here that’s available to larger teams. Google Voice Starter caps at 10 users and RingCentral Essentials caps at 19. But NBC is explicitly priced for 25 or more users.
    • If you’re comparing cheap plans but you’ve already outgrown small-team caps, NBC is one of the only realistic options on this page.
  • Call Centre Basic is more telephony basics than true call-centre operations. You do get essentials like voicemail, voicemail-to-email, call forwarding, out-of-hours management and music on hold.
    • Call Centre Basic does not include call queues, call reporting or analytics, call recording, or call flows, however, so it won’t suit high-volume inbound teams unless you move up the NBC ladder.
  • It keeps procurement simple for traditional call centres. Call Centre Basic offers direct debit billing, number retention, and optional desk phone rental (from £5 per month) as options for businesses rolling out 25 seats or more.
    • Compared with BYOD-first, app-led setups, this is more friendly to those businesses with physical handsets who might only just be transitioning to VoIP before the deadline in a matter of months.
NBC Cloud Voice software on desktop, laptop, tablet and mobile
NBC Cloud Voice VoIP software can be used on desktop, laptop, tablet and mobile devices. Source: NBC

Are there any downsides to NBC Call Centre Basic?

  • The headline price can be misleading because calling is not included. With no call package included, it means you need to model your costs using real call volumes.
    • Against this page’s other “cheap” picks, that’s a major difference: bOnline Starter and RingCentral Essentials include a small outbound allowance, while Google Voice is positioned around unlimited calling.
  • Your total monthly cost can climb quickly once you add the basics many teams expect. For instance, call recording is listed as an extra (starting at £5 per month for 30-day recording), while an AI auto-attendant is listed as an extra (from £2.99 per month).
    • Extra numbers add cost too (additional local numbers from £2 per month; non-geographical numbers from £5 per month).
  • Support hours aren’t a 24/7 safety net. NBC lists UK customer care hours as Monday to Friday from 9am to 6pm (not round-the-clock), which is a risk if weekend downtime could mean an emergency for your operations.
    • RingCentral is the standout choice for 24/7 coverage.

What businesses is NBC Call Centre Basic best for?

  • Best for: UK call centres with 25 or more users that need queues and auto-attendant style call handling and are prepared to cost-model minutes (because the plan doesn’t include a call package).
  • Also good for: Teams that still want (or need) a more traditional rollout with optional desk phones rather than a softphone-only setup.
  • Not ideal for: Small teams (you won’t meet the minimum) or any organisation that wants an all-in predictable bill with calling included by default (you’ll be better served by a plan that bundles minutes, even if the per-user sticker price looks higher).

6. Vonage Express: Best Cheap VoIP For Calling Features

Vonage Express is the best cheap plan if you care about call handling breadth, not the lowest sticker price.

At £10 per user, per month (with a five-user minimum), it includes a deep bundle of day-to-day calling tools inside Vonage’s desktop and mobile apps. But it’s still a metered calling plan, and its more advanced call centre and integration tools are set at higher tiers.

Vonage logo
Vonage Express
Pricing £10/user/month
Strengths

Superb range of training features like call whisper and barge

Customisable dashboards and wallboards give you real-time visibility of KPI progress

Displays a local number when reaching out to customers, improving response rate

Weaknesses

Limited software integrations and communication channels

Security is not as robust compared with other phone system providers

All Vonage Plans and Pricing
PlanPrice (per user, per month)Communication features
Express £10 Metered minutes, over 30 basic calling features, mobile/desktop app, unlimited inbound calls
Core £15 Unlimited outbound calls, integration with CRMs, Microsoft Teams compatible, Wifi phone ready
Max £25 Mobile eSim, voicemails and text messaging records, company-wide call recording

What does Vonage Express do well?

  • It packs in more calling controls than the other cheap plans. Vonage Express includes a long list of practical features for both desktop and mobile use, such as call screening, hold (with music), call parking, call waiting, call forwarding, call flipping, call blocking, and voicemail-to-email.
    • If you’re choosing between Vonage Express and NBC Call Centre Basic at a similar per-user cost, we’d argue Vonage gives you a better toolkit out of the box in terms of straight calling (albeit for £0.01 per user extra).
  • Team communication is stronger than most budget plans. Team messaging is built into Vonage’s mobile and desktop apps, so you’re not forced to add a separate chat platform on day one, like RingCentral Essentials.
    • This is a practical advantage over bOnline Starter for teams that want chat alongside calling without jumping tiers.
  • Admin and reporting basics are included. Each user gets call logs, and you get an admin portal for permissions, plus basic analytics to track activity.
    • This is a more appropriate setup for managers than ultra-minimal plans designed mainly as a single company line, such as Virtual Landline’s Office Lite
  • Useful caller ID controls for outward-facing teams. Vonage includes a dynamic local caller ID, which is helpful if your business depends on customers picking up calls from unknown numbers.
vonage users tab
All your Vonage user accounts, with their respective extensions, direct numbers, emails and user type/permissions, are listed in the Phone System's ‘Users’ dropdown. Source: Vonage

Are there any downsides to Vonage Express?

  • It’s not that cheap for very small teams. The five-user minimum means a solo business or two-person team can’t buy “just what they need” in the way they can with Virtual Landline Office Lite or bOnline Starter.
  • Calling is metered, which won’t be suitable for outbound-heavy teams. This is not the plan you pick if your team spends all day on the phone.
    • Google Voice Starter remains the more defensible pick for heavy outbound calling patterns because it’s positioned around unlimited-style calling value, whereas Vonage Express is priced around a metered model.
  • Vonage paywalls advanced call management features. Tools like call recording, call monitoring, queues, groups, and receptionist tools only appear on Core (£15 per user, per month), as well as CRM integrations.
    • This is how bOnline Starter can be a smarter cheap buy, because you have the flexibility to add features like CRM integration and recording without forcing every user onto a higher priced tier.
Vonage app marketplace website for third-party integrations
Third-party integrations are available on Vonage's app marketplace. Source: Vonage website via Expert Market
  • Video meeting tools aren’t part of the entry tier. Vonage Meetings and other conferencing/receptionist tools are positioned on Core (around £15/user/month) and up.
    • If you want video included on a cheap plan, bOnline’s entry-level positioning is stronger since it comes included (albeit with its own limits).

What businesses is Vonage Express best for?

  • Best for: Small businesses (five or more users) that want the widest set of calling features at the cheap plan level, and don’t need call centre tools or CRM integrations yet.
  • Also good for: Teams that want team messaging inside the same app as calling, without committing to a higher-tier UCaaS plan immediately.
  • Not ideal for: Solo users and microteams (due to the minimum seats), outbound-heavy calling teams on tight budgets (metered calling) or any business that expects queues, recording and CRM integrations to be included without stepping up to £15 or £25 per user, per month tiers.
What About 8x8?

One big-name VoIP provider we thoroughly recommend is 8×8. However, it uses a bespoke pricing system. In other words, we can’t be sure how much you’ll end up paying as it appears to be different for every user. And if that’s the case, we can’t guarantee it will be a cheap buy, either.

That’s why we’ve left 8×8 off the list, though you can read about what it offers in our 8×8 review or check out other top cloud phone systems in our dedicated roundup.

How To Choose the Best Cheap VoIP Provider for Your Business

Above all, price is often the determining factor for businesses. As such, when picking the best VoIP for your needs, you need to consider the bottom line cost (or the best value option for your specific business needs). This requires you to consider several different features:

1. Pricing structures

Compare the pricing plans offered by different providers. We recommend you look beyond the initial cost per user and consider any additional fees for setup, equipment or extra features that you require.

For instance, many of the providers we listed here either require additional payment or for your business to opt for a slightly higher-priced package for specific features, such as call recording or video conferencing.

2. Contract terms and lengths

It’s also worth considering how long you want to commit to a specific VoIP provider. Some providers may offer discounts for annual contracts or three-year commitments in some instances.

We also recommend reviewing the terms of any contracts carefully, as you may find cancellation policies and contract renewal terms that bring unexpected costs in the future.

3. Trial periods

Long contracts might not be preferential for a business looking to cut costs in the short-term or for a first-time VoIP business looking to see what features work for them. However, you can often make use of free trial periods to check if a service is right for you.

Some VoIP providers offer money-back guarantees, too, if the trial is too limiting for your business needs.

4. Scalability, integration and compatibility

Choosing one VoIP provider that could meet all your future business needs down the line, rather than chopping and changing your plans as required, can sometimes keep costs lower.

This is because you won’t have any of the costs of changing providers, such as any changeover fees, costs of adapting and integrating existing hardware or software with a specific VoIP, or losses in efficiency when you and your staff need to learn your VoIP system.

So, if a provider offers flexible plans or add-on features to accommodate an increasing number of users or additional functionalities as your business expands, it can be both an easier and more cost-effective solution for the long term.

Of course, this only applies to businesses that may need greater functionality in the future, with tools for CRM integration, analytics or advanced calling tools often reserved for higher price tags.

If your business isn’t likely to require any further tools down the line, sticking with the cheapest plan around shouldn’t pose any problems.

5. Features

Of course, price interacts with the features you need. Basic features like call forwarding, voicemail-to-email transcription, and mobile integration should come as standard.

However, as mentioned, many providers restrict their advanced features, such as video conferencing, CRM integration and call analytics, for certain plans. It’s worth considering what plan offers the best value for the functionality you need.

6. Customer support

Quality customer support is crucial for resolving issues promptly as and when they arise. Look for providers that offer 24/7 support and multiple channels of communication such as phone, email and live chat.

7. Security and compliance

Since VoIP systems tend to handle sensitive business communications, robust security measures are essential — especially in certain sectors, such as healthcare. Verify that the provider implements encryption protocols and compliance with industry standards, such as GDPR or HIPAA, depending on your business’s requirements.

How Did We Find The Cheapest VoIP Providers in the UK?

To find the cheapest VoIP providers in the UK, we took our top-ranked VoIP services and simply found the lowest-priced plans that they offer.

From there, we compared each of them against one another, looking at how much value you get for that low price (as often, the cheapest VoIP plans are somewhat limited compared with the higher priced and fully-fleshed out plans on offer). Some of these assessment areas include:

Our main testing categories for VoIP products and services are:

  • Call management features: The software’s capabilities for streamlining incoming calls. VoIP-using organisations often deal with high call volumes. They rely on call management features to create a better experience for these callers.
  • Software integrations: The extent of the software’s compatibility with other business applications. VoIP software is often used with customer-data applications and other communication technologies in order to increase operational efficiency.
  • Communication channels: The other communication methods supported beyond voice calling. VoIP is often purchased to streamline communication into one application rather than separate platforms.
  • Training features: The software’s capabilities for supporting employee training initiatives. VoIP-using businesses often train their employees on telephone etiquette.
  • Hardware integrations: The software’s compatibility with different devices. VoIP software is often used with standalone hardware.
  • Customer support: The accessibility and convenience of customer service channels offered by the VoIP provider.
  • Security options: The software’s security features to protect calls and data. Organisations can be put at risk if sensitive information is leaked due to a breach of security.
  • Pricing factors: The software’s pricing structure and cost-effectiveness. For this page, we ranked providers purely on their per user cost, but we’ve also assessed the value of these plans in the reviews above.

Where possible, we’ve also completed usability testing for VoIP services that we could get hands-on with. Testers put VoIP software through its paces to assess how well each could complete certain prescribed tasks.

Which Cheap VoIP Provider Should You Choose?

Virtual Landline Office Lite is the cheapest VoIP plan on this page at £6.95 per user, per month. If your goal is simply to replace a legacy landline with the lowest possible monthly spend ahead of the 2027 switch-off, it’s the best option for low-cost basics.

It’s best treated as a single-office-number setup, not a full multi-user phone system with individual direct lines for every staff member.

For most small UK businesses, though, cheap only stays cheap if the plan matches your business’ calling practices.

That comes down to three decision levers: inbound handling (do callers reach the right person when you’re busy?), outbound volume (will minute caps force an upgrade?) and growth headroom (will you outgrow the system and have to migrate?).

If you want the best-value cheap phone system plan for a small business, bOnline Starter is the safer bet than the absolute cheapest options.

It’s built for inbound reality: routing, greetings, hold music, and queues so callers aren’t dumped into missed calls. It also gives you a clearer path to add specific capabilities later (like recording or CRM connectivity) without automatically forcing every user onto a £20-plus tier.

If your team is outbound-heavy (sales, bookings, recruitment, chasing invoices), Google Voice Starter is the smartest cheap pick because it’s designed to reduce outbound friction.

The calling rates page shows £0.00 per min for standard UK calling (while still charging for certain UK number types), which makes it a fundamentally better fit than minute-capped plans for high-calling teams, especially if you already pay for Google Workspace and want everything under one admin umbrella.

If your priority is future-proofing (i.e. you don’t want to migrate providers when your business grows) RingCentral Essentials is the top ‘buy once’ option.

It’s not the best value at the entry tier and it’s deliberately limited compared with RingCentral’s higher plans, but it gives you the cleanest upgrade path into a much more complete system when you need deeper analytics, integrations and more advanced admin controls.

Bottom line: Virtual Landline is the cheapest way to get a working business number online. But, if you rely on calls to win work, retain customers or manage bookings, you’ll usually get a lower total cost by choosing a plan that matches your call patterns, with either bOnline for inbound handling, Google Voice for heavy outbound, or RingCentral for long-term scalability.

Meet our Expert author

Richard Sutherland, info-tech lecturer and experienced call centre manager
Richard Sutherland

Richard Sutherland is a versatile professional with extensive experience in technology and management. He has served as a call centre manager for Samsung, led frontline teams and ensured efficient operations. Richard’s perspective and experience make him an excellent resource for owners and managers looking for products and services to improve their small business’ operations.

Written by:
Matt Reed is a Senior Communications and Logistics Expert at Expert Market. Adept at evaluating products, he focuses mainly on assessing fleet management and business communication software. Matt began his career in technology publishing with Expert Reviews, where he spent several years putting the latest audio-related products and releases through their paces, revealing his findings in transparent, in-depth articles and guides. Holding a Master’s degree in Journalism from City, University of London, Matt is no stranger to diving into challenging topics and summarising them into practical, helpful information.