You want numbers with shared inboxes for calls and texts, CRM integrations, and an AI agent (Sona) that can answer when you're busy.
You're already on Google Workspace and want the cheapest per-user line, managed alongside Gmail.
Google Voice Starter is $10/user/month plus Workspace; Quo Starter is $15/user/month billed annually, or $28 monthly. Quo includes its Sona AI agent with about 10 calls' worth of credits a month on every plan. Google Voice has no AI that answers calls.
Entry prices, how each one bills, and what you get on the cheapest plan. We added a third row so you can see where Fast Response fits.
| Vendor | Starting price | How it's billed | Cheapest plan includes | AI answering | Business texting | Best for |
|---|---|---|---|---|---|---|
| OpenPhonenow Quo | $15/user/mo (Starter, billed annually) | Per user; $28/user/mo billed monthly | 1 number per user, unlimited US and Canada calling and texting, voicemail transcripts, Sona AI agent | Sona AI agent included with 1,000 credits (about 10 calls)/mo; more from $25/mo | Unlimited US and Canada, plus $19.50 one-time and $1.50 to $3/mo carrier fees | Small teams that text customers a lot and share numbers |
| Google Voice | $10/user/mo (Starter) | Per user per month, plus a Google Workspace plan billed separately | Up to 10 users, unlimited domestic calling and US texting, call recording, voicemail transcription | No AI agent answers calls; Gemini call notes from Standard ($20/user) | Unlimited US texting included | Small teams already running on Google Workspace |
| FAST RESPONSE AIThe third option | $29/mo (Starter, 1 user) | Flat monthly plan, no per-seat fees; Pro is $79/mo for your whole team; no contract | Business number, calls and texts answered 24/7, recording, transcripts and summaries, built-in CRM, web chat | Built in on every plan, in 29+ languages; your team can pick up first | Included; we handle your texting registration so you text from day one | Small teams that want your team and an AI answering the same number |
OpenPhone and Google Voice figures are list prices from each vendor's own pricing page, checked September 30, 2026, in USD before taxes and fees. Annual prices assume a yearly commitment. Check each vendor's site for current pricing. Fast Response figures are exact.
Quo, the company formerly called OpenPhone, prices per user. Billed annually, Starter is $15/user/month, Business is $23 and Scale is $35. Billed monthly, those are $28, $33 and $47. Each user gets one local or toll-free number, and extra numbers are $5/month each.
Sona, Quo's AI agent, is included on every plan with 1,000 automation credits a month, which Quo equates to 10 calls. More credits are a monthly add-on, from $25/month for 40 calls up to $199/month for 600, with per-call overage of $1.00 down to $0.45 depending on the tier. US texting also carries carrier registration fees: $19.50 one-time and $1.50 to $3 a month.
Google Voice for teams is an add-on to Google Workspace, priced per user per month: Starter is $10 (up to 10 users), Standard is $20 (unlimited users, auto attendants and ring groups), and Premier is $30 (adds automatic call recording, transcription and AI notes, plus advanced reporting). Google states the Workspace plan is billed separately, so your real cost is the Workspace seat plus the Voice license.
Because it's per user, the bill scales with headcount: five people on Standard is $100/month for Voice before Workspace. Phone menus aren't on Starter, so a team that wants "press 1 for sales" starts at $20 per user.
Both give each person a business number that works on their phone and computer, with unlimited US calling and texting and voicemail transcription.
Quo (OpenPhone) is built for teams that text. You can create numbers for locations or teams, each with its own inbox. Starter includes the Quo API and Sona; Business adds AI call summaries and transcripts, phone menus, call transfers, group calling, automatic call recording, and HubSpot and Salesforce integrations. Zapier, Make and webhooks are available too.
Google Voice is built for Google shops. It runs inside Gmail, Calendar and Meet, blocks spam, and is managed from the Workspace admin console. Starter includes call transfers and call recording; Standard adds auto attendants, ring groups, call queuing, Gemini note-taking and eDiscovery for calls, voicemails and texts.
The biggest gap is AI answering: Quo includes an AI agent on every plan (with a monthly credit allowance), while Google Voice doesn't offer one.
Choose OpenPhone (Quo) if texting is central to how you work, you want integrations and an API, or you want an AI agent without adding another vendor. Plan on Business ($23/user annually) if you need phone menus, transfers or automatic recording.
Choose Google Voice if you're on Workspace, you need simple calling for a few people, and you value Google's admin and eDiscovery tools.
Both bill per user, so the cost climbs as your team grows.
Already leaning toward leaving one of them? Quo (OpenPhone) alternative
Quo and Google Voice both price per user, and only Quo's AI answers calls, within a monthly credit allowance. Fast Response gives your whole team one business number with AI answering on every plan and no per-seat fees.
Weighing it against a traditional service too? See our breakdown of answering service cost, or compare Fast Response plans.