Best VoIP phone system for business in 2026: 10 options tested and ranked

TL;DR

• Google Voice is best for small businesses who want an affordable and easy-to-use option to place calls and send texts.
• Allo is best for small teams (1 to 20 users) who want a VoIP phone system that also handles calls for them, because it bundles an AI receptionist, call transcriptions, and deep CRM integrations into a single, affordable plan with no add-ons.
• lemlist is best for outbound sales teams who want a native VoIP dialer built into their email and LinkedIn sequences, with every call recorded, transcribed, AI-summarized, and synced to the CRM.
• RingCentral is best for larger, US-based teams that need a proven, feature-complete UCaaS platform with 500+ integrations, but only if they have the patience for a complex (and difficult-to-cancel) contract.

For years, switching to a VoIP phone system for business was mostly a cost-saving move. Ditch the landlines, slash the phone bill, set everything up in a browser. That was the deal.

AI has changed this entirely. A business phone system can now transcribe every call automatically, draft a follow-up email the second you hang up, handle inbound calls on its own when your team is unavailable, and push everything (recordings, summaries, contact updates) into your CRM without any manual effort. Your phone system is no longer just infrastructure. It is a layer of business intelligence.

This shift in expectations also means some older names no longer belong on the shortlist. Ooma and Grasshopper, once go-to options for small businesses, have not kept pace. Ooma only introduced AI transcription in April 2026. Grasshopper still does not transcribe calls at all. Both carry dated UIs and limited integration options. We tested them, and we chose not to include them here.

Instead, we focused on ten VoIP phone system providers that are genuinely moving forward: Google Voice, Allo, Quo, Zoom Phone, RingCentral, Dialpad, Nextiva, Aircall, lemlist, and Microsoft Teams Phone. We evaluated each one on four criteria that actually matter when choosing a business VoIP phone system: integrations (does it talk to your CRM?), AI features (does it save you time?), pricing (what do you actually pay?), and ease of use (can you set it up without a manual?).

Here is what we found.

At a glance: 10 VoIP phone systems compared

Google Voice, best for solo users on a tight budget

Google Voice is exactly what you would expect from a phone product built by Google: extremely clean, deeply integrated with Google Workspace, and stubbornly focused on the basics. The product was launched in 2009 and has largely kept the same feature set since, which is both its charm and its limitation.

If you are a solo operator or a very small team already paying for Google Workspace, it is hard to argue with the price. A local phone number, unlimited calls in the US and Canada, and voicemail transcription for $10/user/month is a tough deal to beat. The UI is as minimal as it gets: it almost feels like Gmail's quiet cousin who happens to make phone calls.

That said, Google Voice is honest about what it is. There is no AI answering service. There are no CRM integrations whatsoever. Routing calls beyond basic forwarding requires the Standard plan at $20/user/month. And if you ever need support, you are mostly relying on community forums because there is no dedicated customer support line for business accounts.

Why we recommend Google Voice (for some people)

Google Voice works well if your needs are simple: one business number, basic call routing, and a voicemail transcription to avoid listening to 3-minute rambling messages. It works poorly the moment you need your phone system to talk to your CRM, scale beyond 10 users, or let AI handle calls when your team is busy.

Google Voice pricing

• Starter: $10/user/month (up to 10 users). Includes unlimited domestic calling, US texting, voicemail transcription.
• Standard: $20/user/month. Unlimited users, on-demand call recording, call routing.
• Premier: $30/user/month. Automatic call recording, advanced reporting via BigQuery.

Note: all plans require an active Google Workspace subscription (starting at $6/user/month).

Demo video of Google Voice

Allo, best for small teams that want AI without the add-on fees

Allo was founded in 2024 by Jérémy Goillot, formerly of French unicorn Spendesk, with a clear premise: build a mobile-first phone system for small teams and salespeople that uses AI to do the work nobody wants to do. No hardware. No bloated enterprise contracts. No add-ons for features that should be standard.

The product has grown quickly. At the time of writing, Allo records a 4.7/5 on G2 with over 200 reviews. Its HubSpot integration holds a 5/5 rating on the HubSpot marketplace across 200+ installs, a level of integration quality that even tools with far longer track records struggle to match.

What Allo does differently is worth explaining clearly. Most VoIP phone systems treat AI as an optional layer: you pay for transcription as an add-on, you pay more for the AI receptionist, you pay again for CRM sync. Allo includes all of that in two straightforward plans, with no add-ons. For a small sales team, this is a meaningful difference.

The AI receptionist in particular stands out. It does not just take a message. It interacts with callers, collects information, and routes appropriately. When no one picks up, it handles the call. The transcripts and summaries it produces sync automatically into your CRM, updating contact records, logging calls, and even drafting follow-up emails.

Allo and Quo (covered next) are, at the time of writing, the only two VoIP providers with an MCP (Model Context Protocol) integration. This means you can connect your call data to AI tools externally: generate sales reports from call transcripts, identify the most frequent customer questions for your FAQ page, or build custom workflows using your call history as a data source. For teams that are serious about making their call data work harder, this is a significant differentiator.

Allo is also one of the only phone systems in this list that integrates with Claap.

Why we recommend Allo

Routing is flexible: you can cascade calls through team members in order (with a custom delay), or ring everyone simultaneously. If nobody picks up, the AI receptionist steps in automatically. One number can be shared across a whole team, which removes the need to buy individual numbers for each person.

Allo's phone numbers are currently available in 11 countries. If your team is spread across more than that, or if you need complex multi-level IVR for a larger operation, you will want to look at Aircall or RingCentral instead.

Allo pricing

• Starter: $25/month for one user. Includes unlimited calls, a local phone number, AI summaries, basic IVR. 7-day free trial.
• Business: $45/user/month. Includes integrations, unlimited AI answering service, SMS, and international calls. One local or toll-free number included. Additional numbers at $5/month.

No add-ons. No surprise fees. Cancel anytime from the app.

Demo video of Allo

lemlist, best for outbound sales teams who want calling inside their sequences

lemlist started in 2018 as a cold email tool and has since grown into a full multichannel sales engagement platform: email, LinkedIn, and calls in one place. Founded by Guillaume Moubeche, it is built for outbound teams rather than for general office telephony. Calling is the newest pillar, and it changes how the rest of the platform is used.

Unlike most tools here, lemlist is not a standalone business phone line. Its in-app calling is a native VoIP dialer that lives inside your outreach sequences. You add a call step to a campaign, and when a prospect reaches it, the call surfaces as a task with full context: who they are, which emails they opened, what they clicked. Reps work a structured call queue from the Tasks tab instead of dialing ad hoc.

Every call is recorded, transcribed, and AI-summarized automatically, then synced to HubSpot, Salesforce, or Pipedrive with duration, timestamps, and outcome logged. That puts lemlist in the same AI-included camp as Allo and Dialpad, with one difference: the AI sits on top of an outbound sequencer rather than a phone system.

You can connect your own number (supported in around 30 countries) or buy a local number directly in the app for the US, France, the UK, Germany, and Belgium. lemlist also runs phone-number waterfall enrichment, pulling from multiple data providers to find accurate prospect numbers, which is useful when you are calling leads you sourced rather than inbound contacts. If you already run Aircall or Ringover, lemlist integrates with both, so you can keep your existing dialer and still log every call against the sequence.

The honest caveat: lemlist is built around outbound. It is a dialer for reaching prospects inside a sequence, not a full inbound phone system with an AI receptionist or multi-level IVR. If you need a number to receive customer calls, look at Allo, RingCentral, or Aircall. If your team spends its day calling prospects inside sequences, lemlist removes the tool-switching entirely.

Why we recommend lemlist

lemlist pricing

• Email: $39/user/month ($31 billed yearly). 5,000 emails per month. No in-app calling.
• Multichannel Expert: $109/user/month ($87 billed yearly). Unlimited emails and messages, 5 senders per user, in-app calling and VoIP integrations included.
• Enterprise: custom pricing. Everything in Multichannel Expert plus SSO/SAML and a dedicated account manager.

14-day free trial of the Multichannel plan, no credit card required. Calling minutes and phone-number enrichment run on lemlist credits.

Demo video of lemlist

Quo, best for North American teams who want a clean shared workspace

Quo has an interesting origin story. It started in 2018 in Canada under the name OpenPhone, founded by Mahyar Raissi and Daryna Kulya after they noticed small business owners running their companies from personal phone numbers.

The core idea has always been the same: make it easy for a small team to share a phone number and work together on calls and messages. Quo built what feels like a collaborative inbox for phone communications. Threads, internal notes, tags, shared call history. It is less of a traditional business VoIP phone system and more of a team-friendly communication hub.

The UI is clean and the product is genuinely easy to pick up. Quo also ships a built-in lightweight CRM, which is handy if your team does not want to maintain a separate contact management tool.

Like Allo, Quo also has an MCP integration, which means your call data can feed directly into AI-powered reporting and automation workflows.

One important caveat: Quo explicitly prohibits cold calling. If they detect that a user is violating this policy, they can block the account. This is a firm rule, not a gray area. If your team makes cold outbound calls, Quo is not the right fit. Full stop.

Why we recommend Quo

Quo pricing

• Starter: $19/user/month. Includes a local number, unlimited calling/messaging to US and Canada, voicemail transcripts, 10 Sona AI calls included.
• Business: $33/user/month. Adds AI call summaries and transcripts, group calling, call transfers, analytics, HubSpot and Salesforce integrations.
• Scale: $47/user/month. Adds dedicated onboarding, priority live chat, and inbound phone support.

7-day free trial. Additional numbers at $5/user/month.

Demo video of Quo

Zoom Phone, best for teams already living in Zoom

Zoom Phone launched in 2019 as a natural extension of Zoom Meetings. The logic was simple: you are already on Zoom for video calls, so why use a different app for regular phone calls? The integration between Zoom Phone and Zoom Meetings is tight. Switching between a regular call and a video meeting is seamless.

If your team already uses Zoom daily, the case for Zoom Phone is straightforward. You get unified contacts, a shared interface, and no context-switching between apps. The $24/user/month Pro Plus plan bundles both Zoom Meetings and Zoom Phone together, which often makes it cheaper than buying the two separately.

The AI features, branded as "AI Companion," are genuinely useful for the basics: post-call summaries, voicemail transcription, task extraction from voicemails, and voicemail prioritization. That said, Zoom Phone lacks an AI answering service that can handle inbound calls autonomously, which is something that Allo, Quo, and Dialpad all offer.

During testing, the settings interface felt slightly cluttered. There are many options, and their labels are not always intuitive. But if you have already used Zoom Meetings, you know this already.

Why we recommend Zoom Phone

Zoom Phone pricing

• US & CA Unlimited: $18/user/month. Includes unlimited calls in the US and Canada, SMS, a phone number, call recording, integrations, and AI features.
• Pro Plus: $24/user/month. Bundles Zoom Phone with Zoom Workspace (Meetings, Team Chat, Docs, Mail, Live Chat).
• Business Plus: $29/user/month. Larger meeting capacity, more storage, SSO.

Demo video of Zoom Phone

RingCentral, best for large teams that need everything in one place

RingCentral has been around since 1999. In the VoIP phone system market, that is practically ancient history. Over 25 years, it has built one of the most complete communications platforms on the market: voice, video, SMS, WhatsApp, Instagram, fax, and more, all under one roof, with over 500 native integrations.

The product is genuinely impressive in scope. Their AI assistant (AVA) lets you ask questions across your call data, generate email drafts, and handle inbound calls autonomously. Their Conversation Intelligence add-on goes deep into call analytics. And if you need international coverage, RingCentral supports local numbers in over 100 countries.

But scope comes at a cost, and not just a financial one. RingCentral is complex. A small team picking it up without IT support will spend a lot of time in settings menus. The interface has the characteristic feel of software that has accumulated features over decades.

The pricing can also surprise. The base Core plan starts at $30/user/month, but most of the AI features that make the product compelling sit behind expensive add-ons: the AI Receptionist starts at $59/month, and Conversation Intelligence costs $60/user/month on top of your base plan.

Then there is the cancellation issue. Cancelling RingCentral requires calling their support team. They will ask you for your main account phone number, your security question answer, and the last four digits of your credit card on file. Then they will try to talk you out of it. One Reddit user documented taking over an hour to successfully cancel their account. This is a pattern that shows up repeatedly in their Trustpilot reviews, which sit at 1.9/5. If you are going with RingCentral, go in knowing that getting out is not as simple as clicking a button.

Why we recommend RingCentral (with caveats)

RingCentral pricing

• Core: $30/user/month. Includes unlimited domestic calling, call recordings, video meetings.
• Advanced: $35/user/month. Adds CRM integrations, enhanced reporting.
• Ultra: $45/user/month. Adds unlimited storage, webinars, device analytics.
• AI Receptionist add-on: from $59/month (100 minutes included).
• Conversation Intelligence add-on: $60/user/month.

One local or toll-free number included. Additional numbers at $4.99/month.

Demo video of RingCentral

Dialpad, best for SMBs that want real AI without the extra bill

Dialpad was founded in 2011 by Craig Walker, the same person who built GrandCentral before it was acquired by Google and turned into Google Voice.

Unlike most competitors, Dialpad started building its own AI model in 2018, long before "AI features" became a marketing staple in the VoIP phone system industry. That head start shows. Call summaries, live coaching during calls, call scoring, and an AI support agent are all included in the base plan from $27/user/month.

The product covers three distinct use cases through three separate products: Dialpad Connect (for general business VoIP), Dialpad Support (for support teams), and Dialpad Sell (for sales teams). Each has its own pricing and feature set, which keeps things clean and avoids forcing sales teams to pay for support-oriented features and vice versa.

During testing, the overall experience felt polished and well-organized. The learning curve exists (Dialpad has enough features that you will spend time exploring) but the UI is logical once you have mapped it out. Call quality was generally solid.

One limitation worth noting: Dialpad's AI features are currently available in only 9 languages. If your team operates in markets outside that list, the AI value proposition drops considerably.

Why we recommend Dialpad

Dialpad pricing

• Standard: $27/user/month. Includes unlimited calling (your country, the US, and Canada), a local number, call forwarding, call recording, up to 3 departments, and all AI features.
• Pro: $35/user/month. Adds SSO, phone support, and up to 25 departments.

Demo video of Dialpad

Nextiva, best for US businesses that want UCaaS on a budget

Nextiva was founded in 2008 with the mission to make enterprise-grade communication tools accessible to businesses of any size. The tagline at launch was direct: help every business operate like a Fortune 500 company, at prices they can afford.

Today, Nextiva is a full UCaaS platform: voice, video, team chat, SMS, WhatsApp, and even Instagram messaging in one place. The advantage of this breadth is obvious: fewer tools to manage, fewer subscriptions to juggle. The tradeoff is that some features feel better in standalone tools.

The AI story at Nextiva is solid on paper but gets expensive in practice. Voicemail transcription is included in the base Core plan at $23/user/month. But real-time transcription, call summaries, emotion scoring, and the AI IVR all require the Power Suite CX plan at $75/user/month. The AI Receptionist (XBert) is billed separately at $99/month for 100 interactions. That is a steep jump for teams that want AI features but cannot justify the cost of the top-tier plan.

The setup experience was one of the smoother ones in this comparison. The admin interface is clean, and a desktop app is easy to find and install. During our testing, onboarding felt guided and straightforward compared to some of the more complex setups we ran into (Microsoft Teams, we are looking at you).

One important note: Nextiva works in the US and limited parts of Canada. If your team is distributed internationally, this is a hard blocker.

Why we recommend Nextiva

Nextiva pricing

• Core: $23/user/month. Includes a phone number, SMS, video meetings, call routing, team chat.
• Engage: $50/user/month. Adds advanced reporting, web chat, a toll-free number.
• Power Suite CX: $75/user/month. Includes AI transcription, AI summaries, emotion scoring, and intelligent routing.
• AI Receptionist (XBert): $99/month per 100 interactions, then $0.99 per interaction after.

Demo video of Nextiva

Aircall, best for mid-sized teams with deep CRM needs

Aircall was born in Paris in 2014 as a direct challenge to hardware-heavy, slow-to-deploy traditional phone systems. Since then, the company has become famous among sales teams for its strong CRM integrations.

Aircall's integrations are genuinely deep: they sync call recordings, transcripts, and contact updates into CRMs like Salesforce, HubSpot, Attio, and Pipedrive. The HubSpot marketplace rating sits at 4.3/5, which is above the industry average for VoIP integrations. International coverage spans 38 countries, making it one of the stronger options for teams with a global footprint.

AI features are solid too: transcription, call summaries, sentiment analysis, call scoring, live coaching, and an AI draft email generator. But the AI is available in English and French only, which is a real limitation if your team operates in other languages.

There is a catch for smaller teams: Aircall requires a minimum of three licenses on all plans. At $40/user/month on the Essentials plan, that is $120/month at minimum before you have started. The AI Voice Agent is also billed separately at $0.49/minute, which can add up quickly for high-call-volume teams.

Why we recommend Aircall

Aircall pricing

• Essentials: $40/user/month. Includes unlimited calls in the US and Canada, IVR, call recording, SMS, a local number.
• Professional: $70/user/month. Adds a power dialer, voicemail drop, unlimited call recordings, and advanced analytics.

7-day free trial. Minimum 3 licenses on all plans.

Demo video of Aircall

Microsoft Teams Phone, best for Microsoft 365 organizations with IT support

Microsoft Teams Phone was integrated into the Teams platform in 2017 as part of the broader Microsoft 365 suite. The pitch is simple: if your company already runs on Microsoft 365, why use a separate phone system?

On paper, the integration is compelling. Contacts sync with Outlook. Calls feel native inside Teams. The AI features via Microsoft Copilot include call transcription, real-time summaries, and a chatbot you can query during or after calls. Coverage extends to 30+ countries.

In practice, the setup is the single most painful experience in this entire comparison. During our testing, we had to activate options and licenses we did not know existed. Adding a phone number mid-process revealed a requirement to purchase numbers on a completely separate page first, forcing us to restart the flow entirely. To make things worse, there is no AI wizard to guide you through configuration. You are largely on your own, reading documentation that assumes you already know the licensing model.

The licensing model itself is layered in a way that obscures the real cost. You need a Microsoft Teams license ($4+/user/month), then a Teams Phone license ($10/user/month), plus a calling plan ($13 to $17/user/month), and then if you want AI features like transcription and Copilot, add another $30/user/month. That is potentially $57+/user/month before you have paid for anything else.

The bottom line: Microsoft Teams Phone makes sense if you are already a Microsoft 365 shop, you have IT staff who can handle the configuration, and you value the deep integration with the rest of the Microsoft ecosystem. For everyone else, the complexity and cost premium are hard to justify.

Why we recommend Microsoft Teams Phone (for the right organizations)

Microsoft Teams Phone pricing

• Teams Phone Standard: $10/user/month (yearly). Includes the phone technology only, no external calling minutes.
• Teams Phone with pay-as-you-go calling: $13/user/month (yearly). Adds pay-as-you-go outbound calling via Microsoft.
• Teams Phone with Calling Plan: $17/user/month (yearly). Includes 3,000 domestic minutes for the US, UK, and Canada.
• Required add-on, Microsoft Teams licence: from $4/user/month.
• Required add-on, Microsoft Copilot (AI features): $30/user/month.

Demo video of Microsoft Teams Phone

Conclusion

The best VoIP phone system for your business depends almost entirely on where you are today and where you are trying to go.

If you are a small sales team that wants AI to work for you without a complicated setup or surprise add-on fees, Allo is the standout choice. It is the only tool in this comparison that includes an AI receptionist, call transcriptions, CRM sync, and an MCP integration in a single clean plan.

If you want strong AI features at a transparent price point and operate in a mid-sized SMB context, Dialpad is the most compelling option. Its proprietary AI model and all-in pricing are genuinely unusual in this market.

If your team's day is outbound and you want to call prospects without leaving the email and LinkedIn sequences you already run, lemlist is the natural pick. It puts a native dialer, recording, transcription, and CRM sync inside the sequencer your reps live in, rather than asking them to switch to a separate phone app.

If your organization is already deeply embedded in Google Workspace or Microsoft 365, Google Voice and Microsoft Teams Phone respectively make sense, but go in with eyes open about their limitations. Google Voice keeps things simple to a fault. Microsoft Teams Phone is powerful but demands significant IT investment upfront.

For larger teams that need enterprise-grade coverage, 500+ integrations, and every communication channel under one roof, RingCentral delivers (just make sure you are comfortable with its complexity and, crucially, that you understand how to cancel if you need to).