Deepgram Voice Agent API vs Retell AI
Pricing last verified from each vendor's own site.
Verdict
Deepgram's Voice Agent API runs $0.075/min Standard (down to $0.050/min bringing your own LLM and TTS; Advanced $0.163/min) with $200 free credit. Retell is $0.07–$0.31/min pay as you go with $10 free credits.
- Consider Deepgram Voice Agent API if: You are building on an API and want a single published per-minute rate.
- Consider Retell AI if: You want a hosted agent builder with phone numbers, testing and analytics.
Factual summary
- Both are listed under Voice AI & Dialers.
- Directly comparable starting prices are not available for both: Deepgram Voice Agent API — Voice Agent API, pay as you go: Standard $0.075/min ($0.068 on Growth), Standard with your own TTS $0.065/min ($0.051), your own LLM $0.059/min, your own LLM and TTS $0.050/min ($0.041), Advanced $0.163/min ($0.146); $200 free credit; Growth plans from $4K/year; Enterprise via sales; 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.
| Deepgram Voice Agent API | Retell AI | |
|---|---|---|
| Summary | Speech-to-text, text-to-speech and an all-in-one Voice Agent API for building AI phone agents. | AI phone agents priced per minute. |
| Starting price | See vendor | See vendor |
| Pricing details | Voice Agent API, pay as you go: Standard $0.075/min ($0.068 on Growth), Standard with your own TTS $0.065/min ($0.051), your own LLM $0.059/min, your own LLM and TTS $0.050/min ($0.041), Advanced $0.163/min ($0.146); $200 free credit; Growth plans from $4K/year; Enterprise via sales | Pay as you go, $0.07–$0.31/min; $10 free credits |
| Model | usage | usage |
| Free trial | — | — |
| Free plan | — | — |
| Channels | phone | phone |
| Last verified | 2026-10-30 | 2026-10-28 |
FAQ
What is the difference between Deepgram Voice Agent API and Retell AI?
Deepgram's Voice Agent API runs $0.075/min Standard (down to $0.050/min bringing your own LLM and TTS; Advanced $0.163/min) with $200 free credit. Retell is $0.07–$0.31/min pay as you go with $10 free credits.
Which is cheaper, Deepgram Voice Agent API or Retell AI?
We can't compare entry prices directly. Deepgram Voice Agent API: Voice Agent API, pay as you go: Standard $0.075/min ($0.068 on Growth), Standard with your own TTS $0.065/min ($0.051), your own LLM $0.059/min, your own LLM and TTS $0.050/min ($0.041), Advanced $0.163/min ($0.146); $200 free credit; Growth plans from $4K/year; Enterprise via sales. Retell AI: Pay as you go, $0.07–$0.31/min; $10 free credits.
When should I choose Deepgram Voice Agent API over Retell AI?
Consider Deepgram Voice Agent API if: You are building on an API and want a single published per-minute rate. Consider Retell AI if: You want a hosted agent builder with phone numbers, testing and analytics.
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