AssemblyAI's Speech-to-Text API transcribes audio in streaming and pre-recorded modes with speaker diarization.
The Speech-to-Text API offers transcription in streaming and pre-recorded modes, with a real-time model that emits end-of-turn events for conversational flows. Speaker diarization separates participants in multi-speaker audio, and the API integrates with voice-agent frameworks such as Pipecat and LiveKit.
AssemblyAI positions the service for developer and enterprise teams building transcription, meeting, and voice-agent applications.
| Attribute | AssemblyAI Speech-to-Text API | Agent STT, Speech-to-Text API | |
|---|---|---|---|
| Provider |  |  | |
| Founded | 2017 | 2006 | |
| Pricing Model | — | Recurring Subscription | |
| Ownership | Venture-backed | Private |
Provider
Founded 2017
Pricing Model —
Ownership Venture-backed
Provider
Founded 2006
Pricing Model Recurring Subscription
Ownership Private
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Deepgram's Speech-to-Text API is a conversational speech recognition service in real-time and pre-recorded modes.
Developer API for streaming real-time speech-to-speech translation and dubbing over WebSocket.
On-Device Speech-to-Text is a speech recognition offering for Mac and Windows that processes audio locally.
Deepgram's Text-to-Speech API generates streamed spoken audio for enterprise voice-agent applications.
Developer API platform for production-ready speech, transcription, music, agents, and audio generation.
OpenAI Realtime API provides conversational speech-to-speech models for developers building interactive voice agents.
Besimple AI's conversational audio training-data offering.
Meeting-notes software that transcribes conversations and names speakers without a bot.
AI transcription platform that produces live rough-draft transcripts with speaker identification for court reporters and legal transcriptionists.
Offline-capable voice-to-text software that types polished text into any app.
Deepgram's Self-Hosted Speech-to-Text runs its speech recognition models on customer-controlled infrastructure.
Gemini Live API enables real-time voice and vision interactions through streaming conversational models.
Developer platform providing real-time and batch APIs for speech-to-text, text-to-speech, and voice agents.