Deepgram vs Fish Audio vs Cartesia
Side by side, from each listing’s own data. A row where every column says the same is shown once, dimmed.
 Deepgramby DeepgramRemove Deepgram from this comparison |  Fish Audioby Fish AudioRemove Fish Audio from this comparison |  Cartesiaby CartesiaRemove Cartesia from this comparison | |
|---|---|---|---|
| Sets it apart |
|
| — |
| What it is | Speech-to-text and voice AI API with real-time streaming transcription, speaker diarization, and text-to-speech for voice agents. | Generates speech, clones voices and transcribes audio through REST and WebSocket APIs backed by open-weight models, for developers building voice apps and phone agents. | Delivers ultra-low-latency text-to-speech and speech-to-text through the Sonic model family, with a voice-agent framework and streaming WebSocket API. |
| Provider | Deepgram | Fish Audio | Cartesia |
| Official vendor | Deepgram | Not an official listing | Not an official listing |
| Verified | YesSame for all | ||
| Access | API, CLI | API | API |
| Auth | API KeySame for all | ||
| CLI install | Install scriptcurl -fsSL https://deepgram.com/install.sh | sh | No CLI | No CLI |
| API base URL | https://api.deepgram.com | In its docs | In its docs |
| Skills | None listed | Text to Speech, Voice Cloning, Speech to Text, Voice Design, Voice Agent Platform | Speech Synthesis, Voice Cloning, Speech Recognition |
| Streaming | YesSame for all | ||
| Push notifications | NoSame for all | ||
| Categories | Voice & Messaging | Voice & Messaging, Content & Media | Voice & Messaging |
| Tags | speech-to-text, transcription, real-time-audio, diarization | text-to-speech, voice-cloning, speech-to-text, voice-design, websocket-streaming, open-weights | text-to-speech, speech-to-text, low-latency-voice, voice-cloning, sonic-model, websocket-streaming |
| Listed since | Aug 11, 2026 | Oct 17, 2026 | Sep 2, 2026 |
| Use it now | |||
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