AssemblyAI
Speech-to-text API for developers
4.4(150) ratingsFree tierBy AssemblyAI · since 2017
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Updated 6 Aug 2026
What AssemblyAI does
AssemblyAI provides transcription, speaker diarisation and audio intelligence models through a developer API.
Our review of AssemblyAI
AssemblyAI is infrastructure rather than an app: you call it, you get accurate transcripts with speakers, topics and sentiment attached. Accuracy on noisy real-world audio is strong and the documentation is unusually good. There is no end-user interface, so non-developers should look at Otter or Descript instead.
Pros
- High transcription accuracy
- Speaker diarisation and audio intelligence
- Excellent developer docs
- Usage-based pricing
Cons
- Developer-only, no end-user app
- Costs scale with audio hours
- Requires engineering time
Pricing
Free credits to start; usage-based pricing per audio hour.
Use cases
Meeting transcriptionCall analyticsMedia captioning
Integrations
APIPython SDKNode SDK
AssemblyAI alternatives
Closest competitors we have tested against AssemblyAI.
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