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Top 10 Business Phone Systems

The VoIP and cloud phone systems small businesses use for calls, texts and AI answering, ranked by how many businesses each one says it serves.

RingCentral600,000+ businesses 2

Grasshopper150,000+ small businesses 3

Nextiva100,000+ businesses

Quick answer

RingCentral is the largest business phone system, used by 600,000+ businesses, with calling, texting, meetings and an AI receptionist in one app. Grasshopper is second with 150,000+ small businesses and plans from $14 a month, and Nextiva is third with 100,000+ businesses and plans from $15 per user a month. For small teams sharing one number, Quo (formerly OpenPhone) serves 90,000+ businesses.

How it's ranked: Businesses or customers each vendor says it serves, as published on its own website (read November 2026). Zoom Phone, Google Voice, GoTo Connect and CloudTalk publish no business count (Zoom gives 10M+ users only), so they are ranked last. Counts are each company's own claims and are measured differently, so treat them as a guide to scale, not an audit.

RingCentral

RingCentral · Cloud business phone with messaging, meetings and AI receptionist

600,000+ businesses

The biggest and most complete business phone system.

RingCentral is the biggest name on this list: its homepage invites you to join more than 600,000 businesses, and it says it supports 100+ countries with 99.999% availability. Its RingEX business phone covers calling, business SMS, team chat and video meetings in one app, with call routing that sends each caller to the right person or team. The newer selling point is AI: an AI Receptionist answers calls 24/7, handles common questions and routes callers, after-hours calls can be turned into leads with automatic scheduling and text follow-ups, and AI notes, summaries and live translations are built in. RingCentral connects to other software through over 500 pre-built integrations and says it has been named a Gartner Magic Quadrant Leader for the 12th consecutive year. It suits a small business that expects to grow into a larger phone system without switching providers.

Best forGrowing businesses that want phone, text, chat and video from one big, proven vendor

Skip it ifYou only need one cheap number for a solo business

Source: www.ringcentral.com/

Grasshopper

Grasshopper · Virtual phone system for small businesses and solo owners

150,000+ small businesses

The simplest business number for small teams.

Grasshopper says it is trusted by over 150,000+ small businesses, and its pitch is simple: a virtual phone system that keeps business calls, texts and contacts separate from your personal ones. Plans start as low as $14/month, and you can try it free for 7 days. You get a business number (including a toll-free 833, 844, 855, 866, 877, 888 or true 800 number), custom extensions, call forwarding, call recording, custom greetings, voicemail transcription, business texting and virtual fax, all through desktop and mobile apps. Extra extensions cost $3/month each and extra phone numbers $9/month each, and there is 24/7 support. Its app is rated 4.8/5 on the Apple store and 4.5/5 on Google Play. It is the easy choice for a one-person or very small business that wants to look professional without buying phone hardware.

Best forSolo owners and very small teams who want a business number on their own phone

Skip it ifYou need a full office phone system with desk phones and call centers

Source: www.grasshopper.com/

Nextiva

Nextiva · Business phone, texting and contact center platform

100,000+ businesses

Best value full-featured phone system.

Nextiva says 100,000+ businesses on Main Street trust it for their communications, and that over 1 million users rely on it. Its network handles 1B+ conversations a year and it advertises 99.999% uptime. Pricing is published: NEXT Core is $15 per user a month, NEXT Engage $25 and NEXT Scale $75, all on annual billing, and contact center plans start from $75 per agent a month. Core plans include unlimited voice and video calling, business texting from any device, voicemail with transcription and summaries, shared team inboxes, video meetings and virtual faxing, and the feature list also covers skills-based call routing, single sign-on and, on higher tiers, supervisor monitoring. Nextiva is SOC 2 certified and HIPAA compliant, which matters for medical and financial offices. It fits small and mid-size businesses that want a full phone system now and a contact center later.

Best forMain Street businesses that want low per-user pricing with room to add a contact center

Skip it ifYou want a free or single-number setup

Source: www.nextiva.com/

Quo (formerly OpenPhone)

Quo · Shared business phone numbers with AI call answering

90,000+ businesses

Best for small teams sharing one number.

Quo, the business phone formerly called OpenPhone, says it powers conversations for 90,000+ businesses. Its idea is the shared number: calls and texts land in a team inbox, so anyone can pick up a customer conversation and see what was said before. Pricing is clear: Starter costs $15 per user a month billed annually ($19 monthly), Business $23 ($33 monthly) and Scale $35 ($47 monthly), and you can try it risk-free for 7 days. Its Sona AI agent answers when your team cannot and hands the caller back to staff, and calls can be transcribed and summarized. You also get call routing, an auto attendant, call forwarding, number porting and integrations with tools such as HubSpot, Salesforce, Slack and Zapier. Apps run on iOS, Android, macOS, Windows and the web, so it suits a team that works from mobiles and laptops rather than desk phones.

Best forSmall teams that share one number and live on their phones and laptops

Skip it ifYou need traditional desk phones in every office

Source: www.quo.com/pricing

Dialpad

Dialpad · AI-powered business phone and contact center

30,000+ customers

The AI-first business phone.

Dialpad says it has 30k+ customers worldwide, 1k+ employees and 12 global offices, from San Francisco and Austin to London, Tokyo and Sydney. It calls itself an AI platform for customer experience. Dialpad Connect puts voice, video and messaging in one app, and calls get live transcription, AI recaps and sentiment analysis, while sales and support teams can add an AI live coach, AI scorecards and contact center analytics. Its Dialpad Resolve product adds AI voice and digital agents that can answer customers around the clock. For a small business the appeal is that call notes and action items write themselves, so nobody has to type up what a customer said. It fits teams that spend a lot of the day on calls and want to learn from them.

Best forTeams that want live AI transcription and coaching on every call

Skip it ifYou want the simplest, cheapest number

Source: www.dialpad.com/about-us/

Aircall

Aircall · Cloud phone system for sales and support teams

24,000+ businesses

Best for sales and support teams.

Aircall says it is trusted by 24,000+ businesses. It is built for teams that make and take a lot of customer calls, and it plugs into the CRM and help desk tools they already use, so every call is logged against the right contact. Pricing is listed per license: Essentials is $30 a month and Professional $50 a month, both billed annually, with a minimum of 3 licenses; Enterprise is custom priced with a 25-user minimum. Paying annually saves 25%, and new accounts get 100 AI Voice Agents minutes. Aircall puts calls, SMS and messaging in one shared workspace where teammates can step in without losing context, and it adds live transcription, sentiment and topic analysis and real-time coaching with suggested responses during calls. It is a good fit for a small sales or customer support team, but less so for a solo owner.

Best forSales and support teams that live in a CRM or help desk

Skip it ifYou are a one-person business (there is a 3-license minimum)

Source: aircall.io/pricing/

Zoom Phone

Zoom · Cloud phone system inside Zoom Workplace

10M+ users (no business count published)

The natural pick for Zoom users.

Zoom Phone does not publish a count of business customers, so it is ranked after the vendors that do. It does say 10M+ users trust Zoom Phone, and it offers a 99.999% SLA for uptime plus global PSTN coverage in 49+ countries, and Zoom says it has been a Leader in the Gartner Magic Quadrant for UCaaS 7 years running. Phone, meetings and chat sit together in Zoom Workplace, so your calls, meetings and messages live in one place. You can call from desk phones, the desktop app or mobile, use push-to-talk with teammates, send and receive online faxes on your Zoom number, and get AI post-call summaries and voicemail prioritization. An AI receptionist can greet callers, answer questions, book appointments and route calls. It also works with Salesforce, HubSpot and Microsoft Teams, and lets you bring your own carrier.

Best forBusinesses that already run their meetings on Zoom

Skip it ifYou do not use Zoom and want a standalone phone vendor

Source: www.zoom.com/en/products/voip-phone/

Google Voice

Google · Business phone add-on for Google Workspace

No count published

The cheapest add-on for Google Workspace users.

Google does not publish a customer count for Google Voice, so it is ranked after the vendors that do. What it offers is a low-cost phone line that lives inside Google Workspace: one number that rings on your mobile, laptop and supported desk phones, with calling and texting right inside Gmail. Business pricing starts at $10 per user a month for Starter (for up to 10 users), with Standard at $20 and Premier at $30 per user a month, on top of a Google Workspace plan. It is available in 14 countries. Google's AI blocks spam calls and transcribes voicemail, and calls can go straight to voicemail outside your Google Calendar working hours. Admins can set up ring groups, Standard adds multi-level auto attendants and call queuing, and Premier adds automatic call recording, transcription and AI notes. Starter and higher plans include 24/7 support.

Best forSmall businesses already on Google Workspace and Gmail

Skip it ifYou need a business phone outside the 14 countries it serves

Source: workspace.google.com/products/voice/

GoTo Connect

GoTo · Cloud phone system and contact center for small and mid-size businesses

No count published

Solid all-round office phone replacement.

GoTo does not publish a customer count for GoTo Connect, so it is ranked after the vendors that do, and its prices are only given through sales. It describes GoTo Connect as an all-in-one, AI-powered cloud phone system and unified communications platform for small, mid-sized and distributed businesses, with hundreds of features. The basics are all there: a softphone app, business texting, virtual fax, toll-free numbers, extensions, number porting, a custom auto attendant, conference call bridging, international calling and virtual voicemail. An AI Receptionist add-on answers calls around the clock, and GoTo says it delivered 95% fewer missed calls. Support is available twenty-four seven, and add-ons include Microsoft Teams integration, business continuity and reporting. One customer quoted on the page says it saved about $150,000 in its first year by dropping its old phone lines and service contracts.

Best forSmall and mid-size offices replacing an old on-site phone system

Skip it ifYou want prices published online

Source: www.goto.com/connect

CloudTalk

CloudTalk · Cloud calling software with AI voice agents

No count published

Best for international calling teams.

CloudTalk does not publish a customer count, so it is ranked last, though it names customers such as Revolut, DHL, Glovo, Nokia and Pipedrive. It is calling software for teams that make and take a lot of calls, with local numbers in 160+ countries and AI voice agents that speak 70+ languages and accents. It claims 99.999% platform availability. Calls can be routed through IVR menus, queues and skill-based routing, and outbound teams get click-to-call, power dialing and parallel dialing on up to 10 lines at once, with voicemail detection. Managers can listen, whisper or barge in on live calls, and every call can be recorded, transcribed, summarized and scored. CloudTalk connects to 100+ integrations, including CRMs, and the phone system comes with a 14-day free trial. It fits international sales and support teams more than a single small office.

Best forSales and support teams calling customers in many countries

Skip it ifYou only need a basic office line

Source: www.cloudtalk.io/

Questions people ask

What is the best business phone system for a small business?

RingCentral is the largest, used by 600,000+ businesses. For a very small business, Grasshopper (150,000+ small businesses, plans from $14 a month) and Quo (90,000+ businesses, from $15 per user a month billed annually) are simpler and cheaper.

What is the cheapest business phone system?

Google Voice starts at $10 per user a month for Google Workspace users, Grasshopper starts at $14 a month, and Nextiva NEXT Core and Quo Starter are $15 per user a month on annual billing.

Which business phone systems have an AI receptionist?

RingCentral, Zoom Phone and GoTo Connect offer an AI receptionist, Quo has its Sona AI agent, and Dialpad and CloudTalk offer AI voice agents.

Do I need desk phones for a VoIP phone system?

No. All of these work through desktop and mobile apps, and most, including Zoom Phone, Google Voice and GoTo Connect, also support desk phones if you want them.

How were these phone systems ranked?

By the number of businesses or customers each vendor publishes on its own website. Vendors that publish no business count are ranked last. These are the companies' own claims.

How we ranked

Businesses or customers each vendor says it serves, as published on its own website (read November 2026). Zoom Phone, Google Voice, GoTo Connect and CloudTalk publish no business count (Zoom gives 10M+ users only), so they are ranked last. Counts are each company's own claims and are measured differently, so treat them as a guide to scale, not an audit. Every number on this page comes from the source linked under each pick, and every photo shows the actual product. Brands can't pay to be on this list.

List source: www.ringcentral.com/ · Updated 2026-11-13