Ultravox
ultravox.ai
Real-time speech-native voice AI.
Quick Information
- Category:
- Speech & Transcription
- Pricing:
- Freemium
- Platforms:
- API, Web, Mobile SDK
- Free Plan:
- Yes
- API Available:
- Yes
- Last Verified:
- October 2026
What Is Ultravox?
Ultravox is a real-time, speech-native voice AI infrastructure layer for voice agents, from Fixie.ai. Ultravox's own pricing page, stamped October 9, 2026, shows dollar prices with no currency code. Pay as You Go is $0 a month with 30 free minutes of calls, then $0.05 a minute including speech synthesis, no surge pricing, unlimited playground calls and up to 5 concurrent calls. Pro is $100 a month, marked as an annual rate, with no hard concurrency caps, an outbound call scheduler, 5 custom voices and 20 RAG corpora. Enterprise is custom with a priority SLA and org support, via a demo request. The feature table lists SIP pricing at 0.5 cents a minute on Pay As You Go and 0.48 cents on Pro, and thread pricing of $2.00 per million uncached input tokens and $15.00 per million output tokens, with cached input free.
The homepage describes a research lab and product company, and says Ultravox v0.7 scores 91.8% on Big Bench Audio without reasoning and 97% with thinking enabled, which is a vendor claim. It also lists UltraVAD v0.1, a neural turn-taking model, REST APIs, web and mobile SDKs, telephony integrations and built-in tools, and a speech generation section marked coming soon. The page says it is built on open-weight models published on Hugging Face, which is not the same as an open-source licence. The footer shows a 2026 copyright, with no funding or acquisition news and no sign of inactivity. Test latency and interruption handling on your own calls.
Ultravox suits developers building phone and web voice agents who want one speech-to-speech model. Compare Vapi, Retell AI and Pipecat. Browse the Speech & Transcription tools directory for more.
What Can You Use Ultravox For?
Voice agents over phone and web
Speech-native model.
Outbound call scheduling
Pro.
Ultravox Features
- Ultravox v0.7 — 97% on Big Bench Audio with thinking (vendor claim).
- UltraVAD turn-taking — v0.1.
- SIP at about 0.5 cents a minute — Telephony.
Who Is Ultravox For?
- Voice agent developers — Single model stack.
- Contact centres — Scheduling and SIP.
Ultravox Pros & Limitations
What We Like
- Simple per-minute price
- Free minutes
- No surge pricing
Limitations
- Licence is open-weight, not open source
- Pro price is an annual rate
- Benchmark claims are vendor reported
Ultravox Pricing
| Plan | Price | Main Features |
|---|---|---|
| Pay as You Go | $0/month; 30 free minutes then $0.05/min | Up to 5 concurrent calls; unlimited playground |
| Pro | $100/month (annual rate) | No hard concurrency caps; 5 custom voices; 20 corpora |
| Enterprise | Custom | Priority SLA; org support |
Pricing was last verified October 2026. Check the official website for the latest pricing.
AI Listing Jungle Ranking
- Global Rank:
- #687
- Overall Score:
- 58.1/100
- Monthly Users:
- –
- Rank Change:
- ▲ 1271
This ranking reflects AI Listing Jungle's own independent scoring methodology and is not an endorsement by Ultravox or its company. How Our Rankings Work
Frequently Asked Questions
Ultravox price?
$0.05/min after 30 free minutes.
Pro plan?
$100 a month annual rate.
Open source?
Open-weight models.
Concurrency?
5 on pay as you go.
Our Take
A sleek speech-native voice stack.
Test real-call latency.
Ultravox Alternatives
Ultravox Comparisons
Ready to try Ultravox?
Visit the official website to get started.
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