Best VoIP Phone Service in 2026

RingEX is the business phone and unified communications product of RingCentral, Inc., a company founded in 1999 and headquartered in Belmont, California. RingCentral is listed in the United States and reported revenue of US$2.52 billion for calendar 2025, up from US$2.40 billion in 2024, making it the largest company in this list whose revenue comes mainly from business communications. RingEX combines telephony with video meetings, messaging and fax in a single app. Every plan includes unlimited domestic calling, on-demand call recording and meetings for up to 300 participants, and the company has added AI tools including the AI Virtual Assistant, included on Core, and an AI Receptionist sold as an add-on from US$39. The tiers differ mainly in allowances: toll-free minutes rise from 100 on Core to 10,000 on Ultra, and business SMS from 25 to 200 messages per user per month. CRM integrations and multi-site management start on the Advanced plan. Contact-centre functions are sold separately as RingCX from US$65 per user. Limitations documented on the pricing page include the SMS caps, the absence of SMS during the free trial, and conflicting trial limits: the FAQ refers to up to 20 lines while the disclaimer limits the trial to five users and two desk phones.

Zoom Phone is the cloud PBX offered by Zoom Communications, Inc., the company best known for video meetings. Zoom reported revenue of US$4.87 billion for the fiscal year ended 31 January 2026, although that figure covers its whole product range rather than telephony alone. On its current pricing page Zoom sells the phone service in three bundles: US & CA Unlimited, which adds a phone line to the free Workplace Basic tier; Pro Plus, which bundles Workplace Pro with phone; and Business Plus, which bundles Workplace Business with phone. Every bundle includes a domestic number, SMS and MMS, call recording, metered international calling and integrations with Salesforce, Slack, Microsoft and Google. AI features such as post-call summaries, voicemail prioritisation and task extraction are listed even on the entry bundle. Business Plus adds single sign-on, managed domains, data-loss-prevention APIs and unlimited domestic online fax. The main limitation is structural: the entry bundle comes with the free meetings tier, which caps meetings at 40 minutes, and the page refers to separate regional plans and Global Select without giving their prices.

Dialpad is a privately held cloud communications company whose founders, chief executive Craig Walker and chief technology officer Brian Peterson, still lead it; it lists twelve offices including San Francisco, Austin, London, Tokyo and Sydney and claims more than 30,000 customers. The company describes itself as an AI platform for customer experience, and its products are organised into four lines: Dialpad Connect for business communications, Dialpad Sell for outbound sales teams, Dialpad Support for contact centres, and Dialpad Resolve, an agentic AI service billed by credits. Connect, the line most comparable to other entries here, includes HD calls and meetings with real-time transcripts and instant call summaries from its Standard tier; Pro adds CRM integrations and 24/7 support, and Enterprise adds single sign-on, unlimited office locations and a 99.9% uptime commitment. Sell plans include unlimited US and Canada minutes and one year of recording retrieval, while Support plans add omnichannel routing, a power dialer and, at the top tier, workforce management. The pricing page shows one price per tier without stating whether it reflects monthly or annual billing, and Premium plans are annual only.

Nextiva was founded in 2008 by Tomas Gorny, who remains chairman and chief executive, and co-founder Tracy Conrad; its website states that it began with four people in a small office near Tempe Town Lake and that it is based in Scottsdale, Arizona. The company says it serves more than 100,000 businesses and over one million users, and now describes itself as a customer experience platform rather than a phone company. Its small-business NEXT plans combine unlimited voice and video calling with business texting, skills-based routing, shared inboxes and basic CRM and ticketing. AI allowances are metered: NEXT Core includes 50 AI transcriptions, summaries and Answer Assist conversations per user, NEXT Engage 200 and NEXT Scale unlimited. Engage adds live chat, a chatbot, single sign-on and virtual fax; Scale adds supervisor monitoring and directory sync. Contact-centre plans start at US$75 per agent. The pricing page lists no free trial, offers a demo instead, and advertises a promotion of up to 12 months free for switching providers without stating its conditions.

8x8, Inc. is a US-listed provider of cloud communications that sells an integrated phone system, video meetings, team chat and contact-centre software, together with communications APIs. According to the financial data it reports to the U.S. Securities and Exchange Commission, 8x8 recorded revenue of US$735.8 million in the fiscal year ended 31 March 2026, up from US$715.1 million the year before, which places it among the larger independent UCaaS vendors. The company positions its platform for organisations that want telephony and contact centre on one system rather than as separate products,. 8x8's pricing page could not be retrieved when this list was compiled because the site returned rate-limit errors, so no plan names or prices are given here; buyers should treat its pricing as quote-based until confirmed with the vendor. The absence of verifiable published prices is the main reason it is ranked below the providers above, rather than any documented gap in functionality.

Teams Phone is Microsoft's cloud call-control and PBX service for Microsoft 365. It is not a standalone telephone service: a user needs a Teams Phone licence plus a PSTN connection from one of four routes. With a Microsoft Teams Calling Plan, Microsoft acts as the operator, supplying numbers, PSTN access and support with a 99.999% SLA. With Operator Connect, a certified third-party carrier provides numbers that the administrator assigns in the Teams admin centre. Teams Phone Mobile lets a user's mobile SIM number double as their Teams number through a participating mobile operator, and Direct Routing connects any carrier through a session border controller managed by the customer or a partner. The service includes auto attendants and call queues and works in desktop and mobile Teams clients and on certified desk phones. Its strength is integration with Microsoft 365 identity and administration; its main limitation is complexity, since cost and support depend on which combination of licences and PSTN partners a tenant chooses. Teams Phone Mobile, for example, supports only user numbers and not auto-attendant or conferencing numbers. Microsoft's own price page could not be loaded for this list.

Google Voice for business is a cloud phone service sold by Google as an add-on to Google Workspace and, on its Starter tier, as an individual plan. It gives each user one number that rings on mobile, desktop and supported desk phones, and includes unlimited domestic calling and US texting, voicemail transcription and call recording. The Starter plan is limited to one user as an individual plan or up to ten users as a Workspace add-on, and is available in the United States only for individuals and in 14 countries as an add-on. Standard removes the user cap and adds auto attendants, ring groups with queuing, unlimited regional billing locations, eDiscovery for calls, voicemail and texts, and SIP Link for bringing existing numbers. Premier adds international billing locations, automatic call recording and activity reporting in BigQuery. The service is simple and inexpensive but narrower than full UCaaS suites: Google's page lists no CRM integrations or contact-centre features, and unlimited calling applies only in available markets and under additional terms.

Vonage is a cloud communications company headquartered in Holmdel, New Jersey, which sells business phone and contact-centre applications alongside a communications API platform. Ericsson announced its purchase of Vonage on 22 November 2021 for US$21 per share in cash, an enterprise value of about US$6.2 billion, and completed the deal on 21 July 2022. Vonage kept its name and brand and became Ericsson's Business Area Global Communications Platform; at the time it had sales of US$1.4 billion for the twelve months to March 2022 and more than 120,000 business customers. Ericsson described its unified communications and contact-centre applications as fully programmable, built on the same platform as its video, voice, messaging and verification APIs, which suits companies that want to customise call flows with code. Vonage's pricing page refused automated access when this list was compiled, so plan names and prices are not given and pricing is treated as quote-based. Ericsson's 2022 release also noted that Vonage was resolving a U.S. Federal Trade Commission investigation into historic consumer practices.

GoTo Connect is the cloud phone system and unified communications product of GoTo, a software company whose site also offers a contact-centre product. Its pricing page lists five packages: Phone System; Phone System plus AI Receptionist; Customer Experience (CX); CX Complete; and Contact Center. The base Phone System plan includes free calls to 50 countries (which may differ by region), unlimited auto attendants and call queues, customisable dial plans, video meetings for up to 250 participants, 1,000 shared toll-free minutes, hot desking, E911, virtual fax and multi-site support, together with a 99.999% reliability claim. The AI Receptionist tiers include 100 credits for an AI agent that answers calls, routes them by name and captures caller details. The CX tiers add WhatsApp, social channels, SMS campaigns, web chat and integrations with ServiceNow and Zendesk; Contact Center adds agent dashboards, skills routing, auto-dialling and coaching. The main limitation for buyers comparing costs is that every package is marked "Contact Sales", so no list prices are published.

Ooma Office is the small-business phone service of Ooma, Inc., a US-listed company that also sells residential internet telephony. Ooma reported revenue of US$273.6 million for its fiscal year ended 31 January 2026, up from US$256.9 million a year earlier. Ooma Office is sold per user account with "No Contract Necessary" on its three self-serve plans. The Essentials plan includes more than 100 standard features, unlimited calling within the United States, Canada, Mexico and Puerto Rico, a virtual receptionist, a mobile app, one free toll-free number and digital fax. Pro adds a desktop app, up to 250 text messages a month, video meetings for 25 participants, call recording and enhanced call blocking; Pro Plus adds AI transcriptions and insights, CRM integration, up to 1,000 texts, meetings for 100, team chat, hot desking and call queuing. An Enterprise tier, priced individually, adds SIP trunking and Microsoft Teams Direct Routing. Call queuing and CRM integration are reserved for the top self-serve plan, and AI answering and receptionist services are add-ons whose prices are not listed on the plans page.

Quo is the current name of OpenPhone, a business phone app founded in 2018 by Mahyar Raissi and Daryna Kulya and backed by Y Combinator among other investors. Its pricing page describes the product as "Quo (formerly OpenPhone)" and names the legal entity as OpenPhone Technologies, Inc., without dating the rename. The about page claims more than 90,000 businesses, although metadata on the same page says over 60,000, so the figure should be treated with caution. Quo is designed for small teams that share numbers and handle calls and texts from a shared inbox. All plans include one local or toll-free number per user, unlimited calling and messaging to US and Canadian numbers under a fair-use policy, voicemail transcripts, an API and an AI agent called Sona. Business adds AI call summaries, phone menus, custom ring orders, call transfers, HubSpot and Salesforce integrations and automatic call recording; Scale adds AI call tags and dedicated onboarding. Limitations include the absence of video meetings, the ten-user cap on shared numbers on Starter, and separate carrier fees for business texting.

Aircall is a cloud phone system designed primarily for sales and customer-support teams rather than for whole-company telephony. The company says more than 24,000 companies use it and that it offers more than 250 integrations with business tools. Its plans are priced per licence with a three-licence minimum on Essentials and Professional and 25 on Enterprise. Essentials includes unlimited inbound and internal calls, unlimited outbound calls within the US and Canada, one number per licence, SMS and MMS, a shared inbox, IVR, call queuing and basic analytics covering six months, plus 50 minutes a month of AI voice agents. Professional adds AI call summaries and sentiment analysis, smart routing and queue callback, a power dialer, call whispering and coaching, live monitoring, advanced analytics and Salesforce integrations. Enterprise adds unlimited global calls, SSO and SCIM, and an SLA with HIPAA, GDPR and SOC 2 compliance support. Aircall's AI Voice Agents are also sold separately from US$99 a month or US$0.29 a minute. Its pricing page does not show monthly-billing prices, and its FAQ and comparison table give inconsistent statements about API access and volume rates.