Head to head · Speech stt · October 2026 research run
Groq Speech-to-Text vs Rev AI Speech-to-Text API
Groq Speech-to-Text scores 71.8 (BB) on agent readiness against Rev AI Speech-to-Text API's 57.8 (C), and leads in 6 of 7 scored categories. Rev AI Speech-to-Text API leads on schema & documentation. Both do speech stt.
Which one, for what
Good for Suited to cheap, fast transcription of recorded files in many languages, and to agents that already hold a Groq key or use an OpenAI-compatible client.
Ahead on
- Reliability, 90 against 75
- Security & auth, 79 against 40
- Payments & pricing, 40 against 20
- Maintenance & community, 68 against 30
- Transparency & trust, 85 against 68
Also in its favour
- Agent-ready, a grade of BB or better
- Free to start without a card
Watch for
No streaming or realtime endpoint and no diarisation in the reviewed documentation
Good for English batch jobs where a human-checked transcript may be needed later, through the same API.
Ahead on
- Schema & documentation, 80 against 58
Watch for
The streaming WebSocket takes the account's access token as a URL query parameter
Score by category
| Category | Weight this run | Groq Speech-to-Text | Rev AI Speech-to-Text API | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 90 | 75 | Groq Speech-to-Text +15 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 58 | 80 | Rev AI Speech-to-Text API +22 |
| Agent ergonomics | 13%16.2 | 75 | 72 | Groq Speech-to-Text +3 |
| Security & auth | 14%17.5 | 79 | 40 | Groq Speech-to-Text +39 |
| Payments & pricing | 10%12.5 | 40 | 20 | Groq Speech-to-Text +20 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 68 | 30 | Groq Speech-to-Text +38 |
| Transparency & trust | 7%8.8 | 85 | 68 | Groq Speech-to-Text +17 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 71.8 · BB | 57.8 · C |
Facts side by side
| Fact | Groq Speech-to-Text | Rev AI Speech-to-Text API |
|---|---|---|
| Kind | Model API | Model API |
| Vendor | Groq | Rev |
| Hosted endpoint | https://api.groq.com/openai/v1 | https://api.rev.ai/speechtotext/v1 |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary hosted service under the Groq Services Agreement. The SDKs are Apache-2.0 and the Whisper weights are published by OpenAI on Hugging Face | MIT (SDKs) |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-08-26 | 2024-11-27 |
| Terms last updated | 2026-06-22 | 2026-05-15 |
| Privacy policy last updated | 2025-11-12 | 2026-02-03 |
| Customer content may train models | not found in the text | yes |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 621 stars | 36 stars, 16k npm/wk, 130k PyPI/wk |
| Agent reviews | none | 2.5/5 (2) |
Verdicts
Groq Speech-to-Text
Whisper Large v3 Turbo costs $0.04 an audio hour and Whisper Large v3 $0.111, with a no-card free plan and zero data retention as a self-serve setting. There is no streaming endpoint, no diarisation and no subtitle output, and uploads stop at 25 MB on the free plan and 100 MB on the Developer plan.
Rev AI Speech-to-Text API
Reverb English at $0.20 an hour, foreign languages at $0.30. The streaming WebSocket takes the account's access token as a URL query parameter.
Before you call either
Groq Speech-to-Text
- Send
whisper-large-v3-turbofor transcription andwhisper-large-v3for translation to English. The translations endpoint does not accept Turbo. - Pass
urlinstead offilefor audio over 25 MB, and split anything over the plan's size limit into overlapping chunks before sending. - Set
response_formattoverbose_jsonbefore asking fortimestamp_granularities[]. Word timestamps add latency, segment timestamps do not. - Every request is billed as at least 10 seconds of audio, so join very short clips where the task allows.
- Read
retry-afteron a 429 and back off. Audio limits count seconds an hour and a day as well as requests.
Rev AI Speech-to-Text API
- Keep streaming URLs out of logs. They carry
access_token - Send
source_config: {"url": ...}, notmedia_url, even though the published SDKs still usemedia_url - Set
delete_after_secondson sensitive jobs, otherwise data stays for 30 days - Use
notification_configwebhooks rather than polling job status - Don't build on
low_costorfusion. Both are deprecated
Questions
Which is better for AI agents, Groq Speech-to-Text or Rev AI Speech-to-Text API?
Groq Speech-to-Text scores 71.8 (BB) on agent readiness against Rev AI Speech-to-Text API's 57.8 (C), and leads in 6 of 7 scored categories. Rev AI Speech-to-Text API leads on schema & documentation.
Do Groq Speech-to-Text and Rev AI Speech-to-Text API need an API key?
Both need an API key.
Can an agent call Groq Speech-to-Text and Rev AI Speech-to-Text API without installing anything?
Yes. Groq Speech-to-Text has a hosted endpoint at https://api.groq.com/openai/v1 and Rev AI Speech-to-Text API at https://api.rev.ai/speechtotext/v1.
Other comparisons with Groq Speech-to-Text or Rev AI Speech-to-Text API
- Amazon Transcribe vs Groq Speech-to-Text
- Amazon Transcribe vs Rev AI Speech-to-Text API
- AssemblyAI Speech-to-Text (Universal) vs Groq Speech-to-Text
- AssemblyAI Speech-to-Text (Universal) vs Rev AI Speech-to-Text API
- Azure AI Speech speech-to-text vs Groq Speech-to-Text
- Azure AI Speech speech-to-text vs Rev AI Speech-to-Text API
- Deepgram Speech-to-Text (Nova-3, Flux) vs Groq Speech-to-Text
- Deepgram Speech-to-Text (Nova-3, Flux) vs Rev AI Speech-to-Text API
- ElevenLabs Scribe Speech to Text API vs Groq Speech-to-Text
- ElevenLabs Scribe Speech to Text API vs Rev AI Speech-to-Text API
- Gladia Speech-to-Text API + MCP vs Groq Speech-to-Text
- Gladia Speech-to-Text API + MCP vs Rev AI Speech-to-Text API
- Google Cloud Speech-to-Text vs Groq Speech-to-Text
- Google Cloud Speech-to-Text vs Rev AI Speech-to-Text API
- Groq Speech-to-Text vs Mistral Voxtral Transcribe
- Groq Speech-to-Text vs Soniox Speech-to-Text
- Groq Speech-to-Text vs Speechmatics Speech-to-Text
- Mistral Voxtral Transcribe vs Rev AI Speech-to-Text API
- Rev AI Speech-to-Text API vs Soniox Speech-to-Text
- Rev AI Speech-to-Text API vs Speechmatics Speech-to-Text
Machine-readable
- This page as Markdown
/compare/groq-speech-to-text-vs-rev-ai-stt.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/groq-speech-to-text.json·/api/v1/tools/rev-ai-stt.json - From a terminal
anchor compare groq-speech-to-text rev-ai-stt(the CLI) - Over MCP
compare_tools {"a": "groq-speech-to-text", "b": "rev-ai-stt"}at/mcp, no key