Ultravox review (2026): is it worth $100 a month, billed yearly?
Speech-native voice AI platform and API for building voice agents
Black Friday: is there a Ultravox sale?
Ultravox report card
Weak · out of 4.0 · graded Nov 13, 2026
Best for developers building voice agents on one speech model
Ultravox is a speech-to-speech voice model with APIs and SDKs for developers building phone agents. The first 30 minutes of calls are free, then it is $0.05 a minute, but the company was acquired by Inworld and says plans and pricing may change.
Who Ultravox is for
- Fits if you are a developer who wants one model that listens and speaks
- Makes sense if you will pay by the minute and build your own call flow
Who Ultravox is not for
- Not for you if you want a no-code builder: it is APIs and SDKs
- Watch out: the site says Ultravox has been acquired by Inworld, and plans and pricing may change
- Tight if you scale on Pay as You Go: it is capped at 5 concurrent calls
- Watch out: the pricing page marks prices as an annual rate and shows no monthly-billed price
Why Ultravox gets a 1.6
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- CValue for moneyPay as You Go is $0.05 a minute and Pro is $100 a month billed yearly, between the category's $50 dearer-quarter and $150 dearest-tenth lines.
- DFree plan and trialThe first 30 minutes of calls are free. That is a short taste, not a plan.
- CFeaturesA speech-native model, APIs and SDKs, telephony, an outbound scheduler and retrieval corpora. It is a building block, so you build the product around it.
- DEase of useYou need to write code against REST APIs and SDKs, and no store rating exists.
- CPlatforms and integrationsWeb, with APIs and SDKs. No integrations are listed.
What these grades rest on. Graded from this listing, whose facts were read from Ultravox's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/ultravox#review"><img src="https://toolgpa.com/badge/ultravox.svg" alt="Ultravox: 1.6 GPA on ToolGPA" width="196" height="56"></a>Where Ultravox stands among AI agents
Ultravox's GPA of 1.6 is higher than 0 of the 178 other AI agents we grade, and level with 29.
It stands best on value for money (C, above 28 of 178) and worst on ease of use (D, above 0).
Its paid plans start at $100 a month, against a middle price of $25 for the category: 85 of the 98 others that charge start lower.
On features, ease of use and platforms it scores 1.7 out of 4. 89 tools score higher and cost less.
Each grade against the category
Every bar is all 179 AI agents we grade, cut by the letter each got. Ultravox’s own letter is outlined.
- CValue for moneyAbove 28 of 178, level with 106
- DFree plan and trialAbove 55 of 178, level with 8
- CFeaturesAbove 2 of 178, level with 130
- DEase of useAbove 0 of 178, level with 35
- CPlatforms and integrationsAbove 0 of 178, level with 46
Price against what you get
Each dot is one of 109 AI agents. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Ultravox, or make your own?
Keep it
To replace Ultravox you would be making an AI agent, with the models and the safeguards behind it. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 149 of the 178 other AI agents grade higher. It costs $1,200 a year.
What you could not
- An AI agent, with the models and the safeguards behind it.
- A voice model trained on your recordings.
- An API that other software can build on.
What this rests on. Ultravox’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Ultravox?
Ultravox is a voice AI platform whose speech-native model takes in audio directly instead of converting speech to text first. Developers build agents through REST APIs and SDKs for web and mobile, with telephony support. The vendor's site says Ultravox has been acquired by Inworld.
Worth knowing
- The site announces that Ultravox has been acquired by Inworld; future plans and pricing may change.
- The pricing page marks prices as an annual rate; a monthly-billed price is not shown.
- Pay as You Go is capped at 5 concurrent calls.
- Threads pricing is $2.00 per 1M uncached input tokens and $15.00 per 1M output tokens.
Key features
- Speech-native model
- Processes audio directly so tone and cadence are not lost in transcription, and the vendor runs its own inference stack.
- REST APIs and SDKs
- Developer APIs plus kits for web and mobile platforms.
- Telephony
- Built-in telephony support, with SIP calls priced from about half a cent per minute.
- Outbound call scheduler
- Schedules outbound calls; available on Pro and Enterprise.
- RAG corpora
- Attach knowledge corpora to an agent: 2 on Pay as You Go and 20 on Pro.
Ultravox pricing
As of Nov 13, 2026, Ultravox is a paid product with a free trial, starting at $100 per month, billed yearly.
- Starts at
- $100 per month, billed yearly
- Free plan
- None
- Free trial
- First 30 minutes of calls free, then $0.05 per minute on Pay as You Go
| Plan | Price | What you get |
|---|---|---|
| Pay as You Go | $0per month, plus $0.05 per minute | 30 free minutes, then 5 cents a minute; up to 5 concurrent calls and 2 RAG corpora. |
| Pro | $100per month, billed yearly | No hard cap on concurrency, outbound call scheduler, 5 custom voices and 20 RAG corpora. |
| Enterprise | Custom | Priority SLA, org support and customizable limits. |
Read from ultravox.ai on Nov 13, 2026. Prices change, so confirm with Ultravox before you buy.
Ultravox alternatives
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- Ultravox vs Pipecat
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Common questions
Does Ultravox have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. Ultravox is listed for Web.
Does Ultravox have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. Ultravox is listed for Web.
Is Ultravox open source?
Ultravox is not described as open source on its own site, as read on Nov 13, 2026.
Does Ultravox have an API?
Yes. Ultravox offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.