Speechmatics' Speech-to-Text API is a multilingual automatic speech recognition service offered in real-time and batch modes with speaker diarization.
The Speech-to-Text API converts spoken audio into accurate text in both real-time streaming and batch transcription modes, with speaker diarization to distinguish participants in multi-speaker recordings and support for custom vocabulary and domain-specific language.
It is available for enterprise and developer customers through cloud, containerized, virtual appliance, on-device, and hybrid deployments, and covers a wide range of languages and dialects, positioning the service for contact centers, media, meetings, and voice-driven applications.
AssemblyAI
AssemblyAI Speech-to-Text API
assemblyai.com
Deepgram
Deepgram Speech-to-Text API
deepgram.com
ElevenLabs
ElevenAPI
elevenlabs.io
| Attribute | Speech-to-Text API | AssemblyAI Speech-to-Text API | Deepgram Speech-to-Text API | ElevenAPI | |
|---|---|---|---|---|---|
| Provider |  | | | | |
| Founded | 2006 | 2017 | 2015 | 2022 | |
| Sells To | — | — | Enterprise, Small Business | B2B, B2C, Enterprises | |
| Pricing Model | Recurring Subscription | — | Recurring, Software, Usage-based | B2B Subscription, Recurring, Usage-based | |
| Ownership | Private | Venture-backed | Venture-backed | Private, Venture-backed |
Provider
Founded 2006
Sells To —
Pricing Model Recurring Subscription
Ownership Private
Provider
Founded 2017
Sells To —
Pricing Model —
Ownership Venture-backed
Provider
Founded 2015
Sells To Enterprise, Small Business
Pricing Model Recurring, Software, Usage-based
Ownership Venture-backed
Provider
Founded 2022
Sells To B2B, B2C, Enterprises
Pricing Model B2B Subscription, Recurring, Usage-based
Ownership Private, Venture-backed
Deepgram's Text-to-Speech API generates streamed spoken audio for enterprise voice-agent applications.
Developer platform providing real-time and batch APIs for speech-to-text, text-to-speech, and voice agents.
Developer API for streaming real-time speech-to-speech translation and dubbing over WebSocket.
Deepgram's Self-Hosted Speech-to-Text runs its speech recognition models on customer-controlled infrastructure.
OpenAI Realtime API provides conversational speech-to-speech models for developers building interactive voice agents.
Amazon Nova Sonic provides streaming speech-to-speech models for conversational applications and voice assistants.
Offline-capable voice-to-text software that types polished text into any app.
Gemini Live API enables real-time voice and vision interactions through streaming conversational models.
Voice-to-text software that turns speech into formatted writing across apps.
AI transcription platform that produces live rough-draft transcripts with speaker identification for court reporters and legal transcriptionists.
Voice-to-text software that turns spoken words into formatted writing in any app.
Deepgram's Text-to-Speech API generates streamed spoken audio for enterprise voice-agent applications.
Developer platform providing real-time and batch APIs for speech-to-text, text-to-speech, and voice agents.
Developer API for streaming real-time speech-to-speech translation and dubbing over WebSocket.
Deepgram's Self-Hosted Speech-to-Text runs its speech recognition models on customer-controlled infrastructure.
OpenAI Realtime API provides conversational speech-to-speech models for developers building interactive voice agents.
Amazon Nova Sonic provides streaming speech-to-speech models for conversational applications and voice assistants.
Offline-capable voice-to-text software that types polished text into any app.
Gemini Live API enables real-time voice and vision interactions through streaming conversational models.
Voice-to-text software that turns speech into formatted writing across apps.
AI transcription platform that produces live rough-draft transcripts with speaker identification for court reporters and legal transcriptionists.
Programmable voice APIs for making, receiving, and managing phone calls globally.
Voice-to-text software that turns spoken words into formatted writing in any app.
