OpenPhone (Quo) pricing 2026: plans, fees, and AI calls

OpenPhone, which now goes by Quo, costs $15 per user per month on its Starter plan, $23 on Business and $35 on Scale, billed annually. Billed monthly, the same plans cost $19, $33 and $47. Every user gets one phone number with US and Canada calling and texting included. Quo’s AI agent, Sona, bills per call on top: 10 calls a month are included, and paid tiers run from $25 to $199 a month.

Those figures were read from Quo’s pricing page and its Sona pricing help article on November 10, 2026, in US dollars. Quo’s trial is 7 days.

Quo is a business phone app for people: shared numbers, texting, call routing and recording, used from a laptop or a phone over the internet. We build Cartesia, which sells AI voice agents that answer and place calls, not a phone app for your team. The two overlap only on Sona, and that is the part we compare at the end. We have an interest in that comparison. Every Quo number below comes from Quo’s own pages.

OpenPhone (Quo) plans

Annual billing saves $48 a user a year on Starter, $120 on Business and $144 on Scale. The pricing page lists no minimum number of users.

A 5-person team on Business pays 5 × $23 = $115 a month billed annually ($1,380 a year), or 5 × $33 = $165 a month billed monthly.

What every plan includes

• One new or ported number per user, local or toll-free. Porting is free.
• Calling and texting to US and Canadian numbers, subject to Quo’s fair usage policy.
• Voicemail transcripts, the Quo API and email support.
• The Sona AI agent, with 1,000 automation credits a month.
• A shared number for up to 10 paid users.
• Call recording, started by hand.

Quo runs over wifi or mobile data, so calls don’t use your phone plan’s minutes. Customers see your Quo number, and your personal number stays private.

What Business and Scale add

Business adds the call-handling tools a shared line needs:

• Automatic call recording, where Starter records only when you press the button.
• AI call summaries and transcripts for every call. On Starter, these cover only calls Sona handles.
• Phone menus, call transfers, group calling and custom ring orders.
• HubSpot and Salesforce integrations, analytics and reporting, and live chat support.
• Unlimited paid users on a shared number.

Scale adds AI call tags, dedicated onboarding, priority support, and inbound phone support on weekdays from 8 a.m. to 5 p.m. Pacific.

OpenPhone call recording, by plan

If you need every call recorded without relying on someone to start it, that means Business. Recording consent rules differ by state; our call recording laws by state page lists them.

Fees beyond the per-user price

Quo labels the setup fee as carrier registration with The Campaign Registry, the US registry for business texting. Both carrier fees are small, but they sit outside the per-user price, so the first invoice is higher than the plan table suggests.

Quo Sona AI agent pricing

Sona answers calls for you. It bills per call, not per minute: each call uses 100 credits, and calls under 15 seconds don’t count.

Three rules from Quo’s help article change the total:

• Overage is off by default. When credits run out, Sona sends calls to your fallback path instead of billing more. Turn overage on if you need every call answered.
• Unused credits expire at the end of each billing period, including on annual plans.
• Tiers change by hand. You pick a higher tier on the plan and billing page, and it applies right away.

Buying a paid tier needs an active paid plan, not a trial, and admin or owner permissions.

What a real setup costs

Two examples at the rates on Quo’s pages, November 10, 2026, billed annually.

A 3-person office on Business with one extra number. Licenses are 3 × $23 = $69, the extra number is $5, and the messaging fee is up to $3. That is $77 a month, plus the $19.50 setup fee once.

The same office with Sona answering 300 calls a month. Tier 4 covers 250 calls for $99. The other 50 bill at Tier 4’s $0.55 overage, or $27.50, so Sona costs $126.50. Tier 5 at $199 would cover all 300 with room to spare, but costs more at this volume. The account comes to $77 + $126.50 = $203.50 a month.

Where Cartesia fits

Cartesia does not replace Quo’s phone app for your team. What it sells is the AI agent on the line. Cartesia Managed Agents answer and place calls on a Cartesia phone number, numbers you import from Twilio, or your own SIP trunk. They can transfer a caller to a person when the call needs one.

Managed Agents cost $0.03 per minute, with speech to text, the voice and orchestration in that rate. A Cartesia-provided US number adds $0.014 per minute. LLM usage is billed separately.

Because Sona bills per call and Cartesia per minute, the comparison depends on call length. Assume calls average 3 minutes. Quo’s Tier 5 covers 600 calls for $199. On Cartesia, 600 calls × 3 minutes = 1,800 minutes, and 1,800 × ($0.03 + $0.014) = $79.20 before the language model.

If an AI receptionist is what you are after, our AI receptionist guide covers what to buy and what to build. Twilio’s pricing is the reference for numbers and carrier minutes.

Cartesia pricing, for comparison

Cartesia’s plans bill speech to text and text to speech from one pool of credits: 1 credit per character of text to speech, and 3 credits per second of Ink-2 audio.

Managed Agents cost $0.03 per minute, drawn from the prepaid agent balance first. Unused credits roll over up to twice the monthly amount. Cartesia also deploys in your VPC, on-prem, or air-gapped.

Talk to an agent in the playground and call it the way your customers would before you choose who answers your line.

Related guides

• AI receptionist: what to buy, what to build
• Twilio pricing 2026
• Top Smith.ai alternatives
• What is SIP trunking?