Quo (formerly OpenPhone)
Quo is the brand under which the well-known OpenPhone has operated since 2025: a cloud phone system built for small and medium businesses, now expanded with Sona, an AI voice agent that can answer calls autonomously.
May contain affiliate linksStill one of the easiest to use and best-rated phone systems on the market, and the rebrand to Quo adds real AI (Sona) without giving up the simplicity that made OpenPhone popular, though fast-growing teams may notice limits on entry-level plans.
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Quo is the new name, as of September 2025, for OpenPhone, one of the most popular cloud phone systems among small businesses thanks to its simplicity and price. This audit combines public product documentation (official website, pricing page) with verified user reviews on G2 accumulated under both the previous name and the current one.
What Quo (formerly OpenPhone) is and who it’s for
Quo is a cloud business telephony system aimed mainly at small and medium businesses that need a professional business number, separate from a personal mobile, with no hardware to install and no traditional phone system to contract. The rebrand from OpenPhone comes with a repositioning of the company toward what it calls the “AI-powered front office”: the product is no longer limited to managing calls and texts, but now includes Sona, an autonomous voice agent that can answer calls, respond to FAQs, qualify prospects, and send follow-up texts during the conversation itself, with no human involvement.
What it’s like to use day to day
The user experience inherits what made OpenPhone popular: a clean interface, fast number porting, and a desktop and mobile app that requires no prior training. Setting up a number, inviting a team, and starting to receive calls or messages is a matter of minutes, something verified G2 reviews consistently highlight as one of its strengths compared with more complex phone systems.
The most significant new feature is Sona: it’s set up as an additional agent within the call flow and can respond autonomously when the team isn’t available, something that previously required hiring an external answering service or letting the call go unanswered.
The fine print: pricing, Sona credits, and the feature ceiling
Quo maintains three plans per user per month: Starter ($15 annual, $19 monthly), Business ($23/$33), and Scale ($35/$47). All include unlimited calls and texts to U.S. and Canada numbers, one number per user, voicemail transcription, and 1,000 automation credits for Sona (equivalent to about 10 calls). Exceeding those credits comes with an additional per-call cost, between $0.45 and $1 depending on the package purchased.
The nuance that comes up repeatedly in reviews is that the more advanced features — AI call summaries, group calls, native HubSpot or Salesforce integrations — are reserved for the Business and Scale plans, not the entry plan. For a small team that just needs a number and messaging, Starter is enough; for growing teams, it’s worth budgeting for the jump to Business from the start.
Real user reviews
Quo (under the OpenPhone name and now under the new one) maintains a rating of 4.7 out of 5 on G2, with more than 3,300 verified reviews, one of the highest and most consistent figures in the entire VoIP telephony category for small businesses. Users repeatedly highlight the clean interface, the speed of number porting, and the value of the entry plan. The most repeated criticism isn’t about quality but about scalability: fast-growing teams mention hitting feature limits sooner than expected and having to upgrade.
On Trustpilot the rating holds solid, 4.0 out of 5 with more than 1,000 reviews, and there additional nuances about Sona show up: several reviews highlight that the agent does its basic job well (asking the reason for the call, collecting name and number to call back), in line with what the product page promises. On the negative side, a group of users describes support that responds with automated templates to urgent issues (a service outage or a billing problem), persistent bugs like voice transcription failures, and cases of account suspension or blocking with slow resolution. A recurring technical comment is that the company seems to prioritize launching new AI features over fixing already-reported bugs. This deserves some context: people with a bad experience are more likely to leave a review than satisfied ones, so these figures likely overrepresent problem cases relative to the average experience, which across platforms remains notably positive for Quo overall. Even so, as of this audit (September 2026) it’s a pattern worth mentioning honestly.
How it compares with other VoIP phone systems
| Quo (formerly OpenPhone) | CloudTalk | Aircall | JustCall | |
|---|---|---|---|---|
| Strength | Simplicity + AI voice agent (Sona) | International call quality | Integrations and UX | Dialer for prospecting |
| Entry price (annual) | $15/user/month | €19/user/month | $30/user/month (min. 3 seats) | $29/user/month (min. 2 seats) |
| AI voice agent included | Yes (Sona, credit-based) | No | No | No |
| G2 rating | 4.7/5 | 4.4/5 | 4.4/5 | 4.3/5 |
Frequently asked questions
Are Quo and OpenPhone the same company? Yes. OpenPhone rebranded to Quo in September 2025 as part of a repositioning toward AI features; the product and customer base are a direct continuation of the same service.
What is Sona? It’s Quo’s AI voice agent: it can answer calls 24/7, resolve FAQs, qualify leads, and send follow-up texts with no human involvement, included with limited credits on every plan.
Is there a free plan? No, but it offers a 7-day free trial before choosing a paid plan.
Do I need the Business plan for CRM integrations? Yes, native integrations with HubSpot and Salesforce, along with group calls and AI call summaries, are available from the Business plan up.
Is Sona, the AI voice agent, reliable? Trustpilot user reviews describe solid basic performance (identifying the reason for the call, collecting contact details), though some technical users note the company prioritizes launching new AI features over fixing already-reported bugs, like occasional voice transcription failures.
Affiliate disclosure
Product Auditors participates in Quo’s partner program. If you sign up for Quo through the links on this page, we may earn a commission at no extra cost to you. This commercial relationship does not influence our editorial assessment: the score and conclusions are based on public product documentation and verified reviews from real users.
Methodology for this audit
This analysis is based on public product documentation (official website and pricing page) and verified user reviews on G2, checked in September 2026. It does not replace our own extensive testing with a long-term active account. You can read more in our editorial methodology.
- Small businesses and startups that need a professional business number with no hardware or traditional phone system
- Teams that want to automate after-hours call handling with an AI voice agent (Sona)
- Businesses that value a simple interface and fast number porting over very advanced features
- Large teams that need advanced contact center features from the cheapest plan
- Organizations that depend on deep CRM integrations without moving to the Business or Scale plan
- Anyone who wants a brand with no recent history changes: the recent rebrand still causes some confusion in parts of the documentation and links
One business number per user, unlimited calls and texts to U.S. and Canada numbers, voicemail transcription, and a desktop and mobile app.
A voice agent available 24/7 that answers calls, resolves FAQs, qualifies prospects, and sends follow-up texts during the call itself.
Limitation: Works on credits: 100 credits per call, with an additional per-call cost if the plan's included credits run out.
Automatic call transcription and summaries so you don't have to listen to the full recording.
Limitation: Available from the Business plan up.
Group calling and native connectors with HubSpot and Salesforce to automatically log phone activity.
Limitation: Reserved for the Business and Scale plans.
Email support on the Starter plan, live chat from Business, and phone support plus dedicated onboarding on the Scale plan.
Three plans per user/month with a 7-day free trial: Starter from $15 ($19 monthly), Business from $23 ($33), and Scale from $35 ($47), all with annual billing discounted versus monthly. Sona (the AI agent) includes 1,000 automation credits on every plan, with an additional per-call cost if that limit is exceeded.
Per-user/month subscription (monthly or annual, with a discount on annual billing), plus usage credits for the Sona AI voice agent.
- Free plan: No
- Free trial: Yes
Price checked on September 12, 2026. Prices can change: check the current price with the provider.
- Excellent, very consistent G2 rating (4.7/5 with over 3,300 verified reviews)
- Clean interface and a short learning curve, repeatedly cited as one of its strengths
- Sona, an AI voice agent available on every plan, able to answer calls 24/7, qualify leads, and send follow-up texts
- Fast number porting and good value on the entry plan versus other VoIP phone systems
- 1,000 automation credits included by default on every plan (equivalent to about 10 Sona calls)
- Advanced users report hitting a feature ceiling as the team grows, requiring a plan upgrade
- Group calls, AI call summaries, and HubSpot/Salesforce integrations are only on the Business plan or above
- Sona usage beyond included credits is billed per call (between $0.45 and $1 depending on the credit package)
- The rebrand from OpenPhone to Quo is recent (September 2025) and there are still cross-references to the old name in parts of the documentation
- On Trustpilot, a group of 2026 reviews describes support that's unresponsive to urgent issues (service outages, account locks) and persistent bugs like transcription failures
See our editorial methodology.
- AI features and automation8.3 / 10
- Ease of use9 / 10
- Price and cost transparency7.8 / 10
- Call quality and reliability8.2 / 10
- Support and customer service7.7 / 10