Ultravox vs Retell AI
Pricing last verified from each vendor's own site.
Verdict
Ultravox is $0.05/min after the first 30 free minutes (Pro $100/mo lifts concurrency caps). Retell is pay as you go at $0.07–$0.31/min by model choice, with $10 free credits.
- Consider Ultravox if: You want a flat, low per-minute rate.
- Consider Retell AI if: You want Retell's no-code agent builder and choice of voice and LLM providers.
Factual summary
- Both are listed under Voice AI & Dialers.
- Directly comparable starting prices are not available for both: Ultravox — Pay as you go: $0/mo with the first 30 minutes free, then $0.05/min, up to 5 concurrent calls; Pro $100/mo (no hard concurrency caps) at $0.05/min; SIP $0.0048/min; Enterprise custom; Retell AI — Pay as you go, $0.07–$0.31/min; $10 free credits.
This is a factual comparison drawn from vendor sites, not a recommendation. Which fits depends on your channels, volume and budget.
| Ultravox | Retell AI | |
|---|---|---|
| Summary | Speech-native voice AI model and platform for real-time voice agents, priced per minute. | AI phone agents priced per minute. |
| Starting price | See vendor | See vendor |
| Pricing details | Pay as you go: $0/mo with the first 30 minutes free, then $0.05/min, up to 5 concurrent calls; Pro $100/mo (no hard concurrency caps) at $0.05/min; SIP $0.0048/min; Enterprise custom | Pay as you go, $0.07–$0.31/min; $10 free credits |
| Model | usage | usage |
| Free trial | — | — |
| Free plan | — | — |
| Channels | phone | phone |
| Last verified | 2026-11-01 | 2026-10-28 |
FAQ
What is the difference between Ultravox and Retell AI?
Ultravox is $0.05/min after the first 30 free minutes (Pro $100/mo lifts concurrency caps). Retell is pay as you go at $0.07–$0.31/min by model choice, with $10 free credits.
Which is cheaper, Ultravox or Retell AI?
We can't compare entry prices directly. Ultravox: Pay as you go: $0/mo with the first 30 minutes free, then $0.05/min, up to 5 concurrent calls; Pro $100/mo (no hard concurrency caps) at $0.05/min; SIP $0.0048/min; Enterprise custom. Retell AI: Pay as you go, $0.07–$0.31/min; $10 free credits.
When should I choose Ultravox over Retell AI?
Consider Ultravox if: You want a flat, low per-minute rate. Consider Retell AI if: You want Retell's no-code agent builder and choice of voice and LLM providers.
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