Written by Fernanda Alvarez Piñeiro Reviewed by James Macey Updated on September 7, 2022 On this page Best Enterprise Phone Solutions 8x8 X4 RingCentral Ultimate Vonage Advanced Nextiva Enterprise Dialpad Pro Ooma Enterprise Call Center GoToConnect Premium Nuacom Call Center Google Voice Premier How did we compare enterprise phone solution providers? Verdict FAQs Expand Our site is reader-supported – by clicking our links, we can match you with a potential supplier, and we may earn a small commission for this referral. Our carefully curated research reveals that 8×8 X4 ticks all the right boxes when it comes to enterprise needs. With its generous range of integrations and access to Customer Success Managers, 8×8 is easily scalable, granting you full control over the management of your telephone communications.Choosing a VoIP system that will make business-wide communications simple is no easy task. Thankfully, with a wealth of choices available, finding one that fits your enterprise’s needs is not as difficult as it seems. Although we believe that 8×8 X4 is a solid choice, it may not be the right VoIP phone system for your enterprise. To compare providers and quotes, fill in our quick and free quote comparison tool that will help you find the supplier that works for you. The Best Enterprise Phone Solutions Swipe right to see more 0 out of 0 backward forward 8×8 X4 RingCentral Ultimate Vonage Advanced Nextiva Enterprise Dialpad Pro Ooma Enterprise Call Center GoToConnect Premium Nuacom Call Center Google Voice Premier Expert Rating 4.7 Expert Rating 4.7 Expert Rating 4.1 Expert Rating 3.9 Expert Rating 4.1 Expert Rating 3.8 Expert Rating 3.7 Expert Rating 3.6 Expert Rating 3.4 Best For Overall enterprise phone system Best For Call management features Best For Scaling up your enterprise on a budget Best For Large offices Best For Conversational AI Best For Onboarding new staff Best For International calls Best For Customer satisfaction Best For Security features Price $44 Price $49.99 Price $39.99 Price $37.95 Price $25/user/month Price $19.95 – $29.95 Price $39 Price $39.99 Price $24 Domestic Calls Unlimited Domestic Calls 1000 inclusive inbound minutes 2000 outbound minutes per user Domestic Calls Unlimited to domestic landlines Domestic Calls Unlimited Domestic Calls Unlimited Domestic Calls Unlimited Domestic Calls Unlimited Domestic Calls Unlimited Domestic Calls Unlimited International Calls Unlimited to 14 countries International Calls N/A International Calls N/A International Calls N/A International Calls N/A International Calls N/A International Calls Free international calling to 50+ countries International Calls N/A International Calls Free calls to US from any country and free calls to Canada from US Key Features Onboarding supportCall queueRing groupsAnalyticsCustomisable call routingCall recording Key Features Call routingCall transcriptsSetting up teamsCall bargeCall whisperCall monitoringAnalytics Key Features Call recordingCustomizable call routingCall monitoringAnalytics Key Features Call recordingCustomizable call routingCall-flow designerSet up teams and departments Key Features Call queueRing groupsCall recordingAnalyticsCall transcriptsSet up teams and departments Key Features Call recordingCustomizable SLAsCustomizable call routingCall-flow designerAnalytics Key Features Call recordingCustomizable call routingCall monitoringCall-flow designerSet up teams and departmentsAnalytics Key Features Call recordingCustomizable call routingCall monitoringCall-flow designerAnalytics Key Features Everything in the Standard planLocalized + toll-free numbers Integrations CRMHelpdeskWeb conferencingExternal and internal live chatWorkspaceThird-party desktop phone, including Polycom, Cisco, Panasonic, Yealink Integrations 97 CRM platformsHelpdeskWeb conferencingExternal and internal live chatThird-party desktop phones, including Poly, Cisco, Yealink and Unify Integrations CRMHelpdeskInternal live chatEmailWorkspace Integrations CRMHelpdeskWeb conferencingEmailWorkspaceSSO Integrations CRMHelpdeskInternal live chatEmailWorkspaceSSO Integrations CRMHelpdeskWeb conferencingAPIEmailWorkspace Integrations CRMHelpdeskWeb conferencingInternal live chatAPIEmailSSO Integrations CRMHelpdeskInternal live chatAPIWorkspaceSSO Integrations CRMHelpdeskWeb conferencingInternal live chatEmailWorkspaceSSO Try Ooma 8×8 – X4Best Overall Enterprise Phone System 8x8 X4 4.7 Pricing $44 Try 8x8 Compare quotes Quick overview Chosen by over 2.5 million users, 8x8 has a proven track record of success and, according to Forrester Consulting, clients who opted for 8x8 reported a 158% growth in ROI! Known for its customizable drag-and-drop dashboards and intelligent coaching and collaboration tools, 8x8 offers a wide menu of subscription options that will allow you to gradually, or rapidly, scale up your enterprise.With an impressive 4.7/5 rating in our in-depth research, we like 8x8 because it ticks all the right boxes when it comes to an enterprise’s needs. With a generous range of integrations, including CRM, Helpdesk, Web Conferencing, and External Live Chat, you can easily integrate 8x8 with your pre-existing software infrastructure and bring all your business tools under the same umbrella. It also is compatible with a broad range of third-party desktop phones, including Polycom, Cisco, Panasonic, and Yealink, making it a powerful and painless tool to set up. On top of all this, 8x8 X4 also offers onboarding support with their Customer Success Managers, making it a top-notch option for helping new employees adapt to the communications system used by your business. Read more + Read less - Strengths Boasts some of the most generous customer support in the VoIP-verse Unlimited inbound and outbound minutes to 48 countries Offers real-time dashboards and wide range of seamless integrations Weaknesses Free trial only gives you insight into the Express subscription Unclear if Customer Success Managers (onboarding support) come at an extra cost Pricing See more See less PlanStarting price (per user, per month) Express $15 X2 $24 X4 $44 X6 $85 X7 $110 X8 $140 How Does 8×8 Compare To The Other Enterprise Phone Systems Providers?Awarded a 4.7/5 by our independent researchers, who’ve put 8×8’s call center features, pricing, and customer support to the test, we believe it stands out because of its exceptional customer support, security, competitive price, and features. With access to numerous software integrations and a nearly perfect menu of inbound communication features, 8×8 X4 is a reliable and adaptable VoIP system that can supercharge your business communication.However, keep in mind that other providers are equally competitive – if not more so – in some categories. Dialpad, Nuacom, Google Voice and Net2Phone all earned a 5/5 from our researchers, meaning that if you don’t want to break the bank you have plenty of options. If you’re looking for a feature-rich option, we’d say that 8×8 is not the way to go. Earning a 3.9/5 for features in our research, other options like Ooma or Dialpad might be better, because they each score a 4.3/5 and 4.2/5 in this category. RingCentral – UltimateBest Enterprise Phone System For Call Management Features RingCentral Ultimate 4.7 Pricing $49.99 Try RingCentral Read our review Quick overview As a large scale business, one of the things that is bound to be at the top of your checklist are call management features. From being able to record calls for quality checks to setting up teams and departments to optimize your enterprise’s workflow, having a broad range of management features is vital. If call management features are your priority, RingCentral dominates in this category.Scoring a stellar 4.7/5 for features, RingCentral has the highest score in this category out of all the providers we scrutinized on this list. You’ll be able to get your hands on all the call management features that exist in the VoIP-verse with a RingCentral Ultimate subscription. Even though it is more expensive than other subscriptions, it’s still a solid investment in our opinion. Read more + Read less - Strengths Offers skill-based routing, letting you pair the right agent to the right customer Rich menu of management features Tightly integrated IVR and automatic call distribution (ACD), allowing you to leverage customer data Weaknesses Integrability with most software needs Pricier than other options, scoring a 2.5/5 for price in our research Pricing See more See less PlanStarting price (per user, per month( Essentials $19.99 Standard $27.99 Premium $34.99 Ultimate $49.99 How Does RingCentral Compare To The Other Enterprise Phone Systems Providers?Compared to other enterprise phone systems, our in-depth research proves RingCentral deserves a top spot on this list. Scoring a 4.7/5 for features, it has the highest score of the top VoIP systems in the market, thanks to the broad access you get to management, collaboration, conversation, and inbound communication features. This gives you tons of agility for designing the workflow and communication of your business. However, if for some reason you feel that RingCentral is not the one for you, Dialpad Pro and Ooma Enterprise Call Center are not far behind RingCentral, scoring 4.2/5 and 4.3.5 for features, respectively.Although there’s a lot to like with RingCentral, it might be a stretch for your wallet as it’s on the pricier end of the spectrum as it scores a 2.5/5 for pricing in our independent research. So, if the cost is a dealbreaker for you, we’d recommend looking at 8×8 X4, Dialpad Pro, Nuacom Call Center, Google Voice, or N2P US, all of which score 5/5 in this category. Vonage – AdvancedBest Enterprise Phone System For Scaling Up Your Enterprise On A Budget Vonage Advanced 4.1 Pricing $39.99 Try Vonage Compare quotes Quick overview As a large enterprise looking to drive more growth, you might sometimes be constrained by budget. If this sounds like your business, Vonage Advanced could be the solution for you.Scoring a strong 4.1/5 in our independent research, we like Vonage Advanced because of its generous range of integrations, inbound communication features, and collaboration features. Vonage Advanced also gives you access to CRM, Helpdesk, internal live chat, analytics, email, workspace, and SSO integrations. You can still access web conferencing and external live chat, but you’ll have to purchase the Unytalk add-on. However, considering you get access to everything else for only $39.99 per user, per month, we still think it’s a good bargain if you’re looking to scale.Keep in mind that Vonage Advanced misses out on a number of management features. At the price you pay for the subscription, you can only use call recording, customizable call routing, and analytics. Moreover, we scored its security features a 3/5 during our unbiased research. This is because you don’t get multi-factor authentication or password rules. Despite these faults, the price point is significantly more competitive than 8x8, letting you scale without feeling like you’re breaking the bank. Read more + Read less - Strengths Customizable dashboards and wallboards give you real-time visibility of KPI progress Displays a local number when reaching out to customers, improving response rate Generous range of integrations Weaknesses Security is not as robust compared to other VoIP phone systems Misses out on a bunch of important management features Pricing See more See less PlanStarting price (per user, per month) Mobile $19.99 Premium $29.99 Advanced $39.99 How Does Vonage Compare To The Other Enterprise Phone Systems Providers?Compared to its competitors, Vonage sits in second place for scalability, scoring a 4/5, slightly behind RingCentral and Vonage, which rank at 4.5/5. Although it has a less generous offering of management features than RingCentral and 8×8, it has a more competitive price point than both of them. If you’re eager to scale but don’t have deep pockets, then Vonage can be the VoIP solution for your enterprise. Another reason why we like Vonage is because of its strong customer support. Our research team awarded it a solid 4/5 for customer support, ranking it above competitors like GoToConnect and Nuacom. This means it’s a good choice if you’re looking for a provider that will help with onboarding, and system bugs.Despite these positives, Vonage isn’t the strongest for security. Ranking a 3/5 in our research for this category, it lags behind other providers, like GoToConnect and Google Voice, as you miss out on multi-factor authentication and password rules. Nextiva – EnterpriseBest Enterprise Phone System For Large Offices Nextiva Enterprise 3.9 Pricing $37.95 Get free quotes Read our review Quick overview If your offices are on the larger side of the spectrum, we’d recommend going for Nextiva because of its generous collaboration and inbound communication features, and flexible setup. Boasting its own first-party hardware and compatibility with third-party desktop phones, including Cisco, Yealink, and Polycom, Nextiva is a solid choice if you want to have a range of options for what your VoIP system looks like.On top of that, we think Nextiva is a good fit for large offices because of its high-ranking customer support – offering knowledge base, live chat, 24/7 live support, 99.999% uptime guarantee, and onboarding support. Nextiva scores a strong 4.5/5 in this category. This means that as you’re taking on new employees and teaching them the logistical ropes of your business, you will have reliable support on the backend. Read more + Read less - Strengths Competitive price point Fantastic customer support Weaknesses Very limited offering of external connections Missing multi-factor authentication and password rules, limiting security Not many management features on offer, which doesn’t help scalability Pricing See more See less PlanStarting price (per user, per month) Essential $23.95 Professional $27.95 Enterprise $37.95 How Does Nextiva Compare To The Other Enterprise Phone Systems Providers?Compared to other enterprise phone system providers, Nextivasits at a comfortable 4.5/5 for customer support, placing it above others like Dialpad, Vonage and Net2Phone. We also think Nextiva is great for what it offers at its price, which is why we gave it a 4/5 in this category.If you choose to go with Nextiva, keep in mind that it scores a low 2.9/5 in our research for scalability because it has a limited offering of management features, which means you could outgrow the system as your call center grows. Dialpad – ProBest Enterprise Phone System For Conversational AI Dialpad Pro 3.7 Pricing $25 Get free quotes Dialpad review Strengths Great customer support, including a user forum, knowledge base, and live chat Offers a solid range of communication features Fantastic customer reputation Weaknesses Not very easy to scale Doesn’t have an uptime guarantee at the Pro subscription level Pricing See more See less PlanStarting price (per user, per month) Standard $15 Pro $25 Enterprise Custom How Does Dialpad Compare To The Other Enterprise Phone Systems Providers?Our thorough research looks closely at how suitable Dialpad is for enterprises, and it scores a 3.9/5. This is because it has a narrower offering of external connections, when compared to other providers like 8×8 and RingCentral. Therefore, if you’re on the hunt for the master key of hardware and software integrations, we’d recommend looking beyond Dialpad. Compared to other providers, Dialpad also doesn’t have a high ranking for security, standing at 3/5. Missing out on multi-factor authentication and password rules, Dialpad lags behind higher-ranking, more secure options like Google Voice and 8×8, which have perfect scores.However, if you’re shopping around for a price-friendly and feature-rich VoIP system, we’d say Dialpad is definitely a top choice for your business. Scoring a 5/5 for price and 4.2/5 for features, Dialpad’s tailored quote for its Pro subscription means you won’t have to commit to a disproportionately costly system while still enjoying a generous access to collaboration, inbound, and outbound communication features. Ooma – Enterprise Call CenterBest Enterprise Phone System For Onboarding New Staff Ooma Office Pro 3.5 Pricing $24.95 Try Ooma Office Ooma Office review Strengths Roster of features specifically tailored toward small businesses that work remotely or from the office Not tied to a contract – can use the system for as long as needed and can be easily canceled on demand Competitive pricing that won’t break the bank Weaknesses Very limited offering of external connections Not suitable for operations calling outside of US, Canada, Mexico or Puerto Rico Fewer calling features than competitors Pricing See more See less PlanStarting price (per user, per month) Essentials $19.95 Pro $24.95 Pro Plus $29.95 How Does Ooma Compare To The Other Enterprise Phone Systems Providers?Scoring a high 4.5/5 in our independent research for customer support, Ooma is a great choice if you are looking for a VoIP provider that will make onboarding new staff a painless experience. However, if you have a feeling that Ooma is not the provider for your enterprise, 8×8 and RingCentral score a 5/5 in our research for customer support.If you’re looking to onboard lots of new staff on a budget, we’d recommend looking beyond Ooma. Ranking at 2.5/5 for pricing in our research, Ooma is outperformed by others like 8×8 X4, Dialpad Pro, and Net2Phone US, all of which score 5/5 for price.Aside from price, Ooma doesn’t exactly have all the right building blocks to scale alongside your business. Ranking at 2.8/5, This is because It doesn’t offer key management features and isn’t compatible with analytics or external and internal chat integrations. If your priority is to scale your enterprise, we’d recommend leaning towards 8×8 and RingCentral, both of which score 4.9/5 for scalability in our research. GoToConnect – PremiumBest Enterprise Phone System For International Calls GoToConnect Premium 3.7 Pricing $39 Get free quotes Read our review Quick overview GoToConnect is a safe option if you’re looking to get value for your money because it promises a seamless onboarding process, which involves getting your softphone cloud system working within a day. According to our research, it has the richest offering of international calls, giving you access to free international calling to over 50 countries. This makes GoToConnect a fantastic option for businesses that are looking to cater to –or maintain– an international clientele.Featuring a streamlined admin portal, you can easily configure call flows with a drag-and-drop dial plan editor, and comb through call analytics to identify which team or agent needs improvement. For $39.99 per user, per month, you’ll be able to wield all the inbound communication features you might need as a business, including call queue and ring groups. Read more + Read less - Strengths Offers all sorts of inbound communication features Free international calling to 50+ countries, and unlimited domestic inbound and outbound minutes Weaknesses Analytics and workspace integrations unavailable Limited number of compatible platforms for external connections compared to other providers Video meetings can only show up to 25 HD video feeds Pricing See more See less PlanStarting price (per user, per month) Basic $24 Standard $29 Premium $39 How Does GoToConnect Compare To The Other Enterprise Phone Systems Providers?GoToConnect is a strong competitor for scalability, scoring a 4.5/5 in our research. This places it slightly behind others like Vonage, which scores 4.5/5, and 8×8 and Ring Central, which each score 4.9/5. Therefore, If you’re looking for a provider that gives you generous access to international calls, but you’re also looking to scale on a budget, GoToConnect can tick a lot of your boxes.On the other hand, GoToConnect is a poor choice if you want a VoIP system with great external connections. Scoring a low 2.3/5 for external connections in our research, you only have a choice of integrating your CRM system with Salesforce or Zoho. You will also miss out on external live chat, analytics, and workspace integrations. If having numerous external connections is a definite dealbreaker, we’d recommend going for 8×8 or RingCentral instead, which rank at 4.2/5 in this category. Nuacom – Call CenterBest Enterprise Phone System For Customer Satisfaction Nuacom Call Center 3.6 Pricing $39.99 Get free quotes Read our review Quick overview Based on our in-depth research, which also aggregates scores from customer reviews, Nuacom has the highest customer satisfaction in the VoIP sector. It earns an average of 4.6/ 5 from its users from sites like Capterra, Trustpilot, G2, and TrustRadius. Although it is limited in its features for enterprises, when compared with providers like RingCentral, Nuacom has been trusted by key clients, such as Credit Union and Volkswagen. If you’re looking for a provider that has a track record for pleasing its users, you should look no further than Nuacom. Read more + Read less - Strengths Impressive collection of positive customer reviews Unlimited user limit Generous inbound communication features Weaknesses Does not offer analytics or email integration Offers no collaboration features Not transparent about its compliance certification, and does not provide multi-factor authentication or password rules Pricing See more See less PlanStarting price (per user, per month) Unlimited $24.99 Call Center $39.99 Enterprise Tailored How Does Nuacom Compare To The Other Enterprise Phone Systems Providers?Nuacom is unrivaled when it comes to average customer scores given on review sites like G2 and Capterra. It scores a 4.6/5, outclassing all the other providers we look at, including GoToConnect, Ooma, and Dialpad, which all score a 4.4/5. Nuacom also is very competitive for price, scoring a spectacular 5/5 in our research for this category. While it’s not the cheapest option (Google Voice takes the cake with the lowest price point), you get quite a lot for what you pay for.Nuacom, however, is quite weak when we look at security. Scoring a below-average 2/5 in this category in our research, the security offered only includes end-to-end encryption and user permissions.. If strong security is a must for your enterprise, we’d recommend looking at 8×8 or Google Voice, both of which score a stellar 5/5 in this category. Google Voice – PremierBest Enterprise Phone System For Security Features Google Voice Premier 3.4 Pricing $24 Get free quotes Read our review Quick overview Chosen by companies like Dow Jones and ZPG, Google Voice is a top player for clients who are already big fans of Google in their workspace. Using Google AI within multiple aspects of its operation, from blocking spam to transcribing voicemails, Google Voice is known for its robust security features and its seamless integration with everything Google.Although our research has given Google Voice a 2.8/5 for external connections and 2.6/5 for features, which puts it far behind 8x8 and RingCentral, if you’re already happy with all the Google products that businesses tend to use, the setup will be fairly straightforward and painless. Read more + Read less - Strengths Fantastic for Google users Top-rated security features Weaknesses Difficult to integrate with other non-Google systems Customer support is quite restricted compared to other providers Limited range of available features Pricing See more See less PlanStarting price (per user, per month) Starter $10 Standard $16 Premier $24 How Does Google Voice Compare To The Other Enterprise Phone Systems Providers?When it comes to security features, Google Voice is at the top of the ranks, sharing the podium with 8×8 with a 5/5 rating in this category. The great thing is you get access to all the security features you might need at a competitive price point, since it also scores an excellent 5/5 for price in our research. Therefore, if you want to keep your enterprise’s business communications while on a budget, Google Voice is one of the best options out there.While Google Voice is great for price and security, it scores quite low for external connections and features, ranking at 2.7/5 in our research for both categories. If these aspects are must-haves on your VoIP shopping list, we’d recommend going for RingCentral, which scores 4.2/5 and 4.7/5 for each of these categories, respectively. How Did We Compare Enterprise Phone Solution Providers?We've researched and tested 10 market-leading VoIP phone systems, evaluating them in terms of functionality, usability, cost and security options, so we can make the most useful recommendations to US businesses.Using our in-house research framework and ranking process, we evaluated each VoIP system across seven core categories of interest, each weighted differently, and then combined the results to come up with a final score.Our main testing categories for VoIP products and services are:Cost: The pricing structure associated with the VoIP service, such as monthly subscription fees, call rates, setup fees, hardware costs, and any additional charges for add-on features or services.Call features: The functionalities and capabilities offered by the VoIP service, including basic features such as call forwarding and voicemail, as well as advanced features like auto-attendant and conference calling.External connections: The VoIP service's ability to connect and integrate with external systems or devices, such as compatibility with existing phone systems or integration with mobile devices.Customer support: The assistance and resources provided by the VoIP service provider to customers, including technical support, online resources, and access to customer support representatives.Security options: The measures and features implemented by the VoIP service to ensure the confidentiality, integrity, and protection of voice communications and data.Scalability: The ability of the VoIP service to accommodate the growth and changing needs of an organization, e.g. capacity to handle a growing number of users or support multiple locations.Reputation: External customer opinion; the feedback and ratings given by customers who have used a particular VoIP product – the market position and reputation a VoIP software holds. Verdict Even though you’re spoilt for choice with nine great VoIP providers for enterprise, our top-rated recommendations are 8×8 X4, and RingCentral Ultimate. Whether they’re the right choice for your enterprise is, of course, up to you. But we believe that their rich offering of features, integrations, and onboarding support make them excellent choices if you want to make your enterprise communications simple and intuitive.We understand that choosing the right VoIP system for you is a tough call. Whether you’re ready to make a choice, or you’d still like to ask more questions to providers, you can fill in our quick and free comparison tool to fast-forward you through the process. Simply answer a few questions about the needs of your business and we’ll match you with the phone system providers you should know about. They’ll be in touch with free, tailored, no-obligation quotes and answers to your questions. FAQs What Is An Enterprise Phone System? Think of enterprise phone systems as the collection of technologies you use to communicate with your employees and your clients. This includes traditional office telephones, softphones, mobile devices, and audio conferencing. Most commonly, enterprises make use of VoIP (Voice over Internet Protocol) technology, which gives you access to a wealth of features like virtual receptionist, customizable call routing, web conferencing, and more. What Are The Benefits Of An Enterprise Phone System? More agile communication: thanks to the wealth of features of enterprise phone systems, you can easily collaborate and communicate with your team, and clientsEnhanced organization: through intuitive interfaces and external connections, you can unify all of your communication business tools under the same roof.Lower costs: compared to traditional PBX systems or landlines, VoIP enterprise systems tend to save you a bunch of expenses as they require less maintenance. This makes it a great choice for smaller enterprises looking to save. Why Do Large Businesses Need An Enterprise Phone System? As a large enterprise, having an agile and intuitive phone system is a must for three main reasons:You’re likely dealing with complex customer communication journeys, so it’s valuable to have a phone system that enables you to control the management of your callsWith large levels of inbound calls, telephone systems are designed to help you deal with that so you can maintain a strong customer serviceHaving a unified communication solution, such as a VoIP telephone system, that seamlessly integrates with your software skeleton, is a huge advantage Written by: Fernanda Alvarez Piñeiro Fernanda is a Mexican-born Expert Market writer, specialising in providing in-depth insights about business software to help businesses of all shapes and sizes thrive. From VoIP systems to project management software, she’s passionate about helping businesses find the tools and methods that will help give them an edge over their competitors. Fernanda has ample journalistic experience, having written for a multitude of online magazines about topics ranging from Latin American politics to cryptocurrency. Reviewed by: James Macey Senior Business Software Researcher James draws on his 4+ years experience as a researcher to offer specialized advice on a wide range of categories from CRM to Fleet Management. He believes all businesses can grow if they use the right tools and services.