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Deepgram

A speech AI company whose Aura product converts text to speech through an API, alongside its speech-to-text services.

AI voice and text to speech

Updated

Visit Deepgram (the official site)

Main use cases

  1. Build a voice agent
  2. Transcribe spoken audio
  3. Add narration to an app

Ranked in the order the vendor's pages put them.

Alternatives to Deepgram

  1. CartesiaSubstitute
    shares 2 of 3shares 2 of 3: Build a voice agent, Add narration to an app

    Cartesia states voice cloning, multilingual voices and phone or telephony integration; Deepgram's pages do not say. Deepgram states official SDK; Cartesia's pages do not say. Deepgram lists cli; Cartesia's pages do not say.

  2. Google Cloud Text-to-SpeechPartial overlap
    shares 2 of 3shares 2 of 3: Build a voice agent, Add narration to an app

    Google Cloud Text-to-Speech states voice cloning, pre-built voice library, multilingual voices and 4 more; Deepgram's pages do not say. Deepgram states speech to text and self-hosted or on-device deployment; Google Cloud Text-to-Speech's pages do not say. Deepgram lists cli and self-hosted; Google Cloud Text-to-Speech's pages do not say.

Deepgram next to its top 2 alternatives

Each cell is what the vendor's own pages state. Unknown means the pages do not say, which is not the same as no. Where a no rests on a figure, the cell shows the figure.

FeatureDeepgramCartesiaGoogle Cloud Text-to-Speech
Text-to-speech APIYes1Yes9Yes11
Voice cloningUnknownYes10Yes11
Pre-built voice libraryUnknownUnknownYes11
Multilingual voicesUnknownYes10Yes11
Emotion or style controlUnknownUnknownYes11
Real-time streaming outputYes1Yes10Yes11
Speech to textYes1Yes10Unknown
Video dubbingUnknownUnknownUnknown
SSML or markup controlUnknownUnknownYes11
Long-form generationUnknownUnknownYes11
Clear commercial usage rightsUnknownUnknownUnknown
Voice consent verificationUnknownUnknownUnknown
Background music or sound mixingUnknownUnknownUnknown
Webhook or async job supportUnknownUnknownUnknown
Official SDKYes2UnknownYes12
Phone or telephony integrationUnknownYes10Yes11
Self-hosted or on-device deploymentYes1Yes9Unknown
Consumer reading appUnknownUnknownUnknown

Feature list with quotes

  • Text-to-speech API: Yes1

    Build with real-time APIs for speech-to-text, text-to-speech, and voice agents on the world's best voice AI platform

  • Real-time streaming output: Yes1

    Text-to-speech built for live conversations

  • Speech to text: Yes1

    Speech-to-text Real-time transcription, production accuracy

  • Official SDK: Yes2

    SDKs SDK Features JavaScript SDK Python SDK .NET SDK Go SDK Java SDK

  • Self-hosted or on-device deployment: Yes1

    Available in real time or batch, in the cloud or self-hosted

Not stated on the vendor's pages: Voice cloning, Pre-built voice library, Multilingual voices, Emotion or style control, Video dubbing, SSML or markup control, Long-form generation, Clear commercial usage rights, Voice consent verification, Background music or sound mixing, Webhook or async job support, Phone or telephony integration, Consumer reading app.

Sources

  1. https://deepgram.com/, checked 20 Sep 2026
  2. https://developers.deepgram.com/home, checked 20 Sep 2026
  3. https://github.com/deepgram/deepgram-dotnet-sdk, checked 2 Oct 2026
  4. https://github.com/deepgram/deepgram-dotnet-sdk/releases/tag/7.1.1, checked 2 Oct 2026
  5. https://rdap.verisign.com/com/v1/domain/deepgram.com, checked 2 Oct 2026
  6. https://hn.algolia.com/api/v1/search?query=%22deepgram.com%22&restrictSearchableAttributes=url&tags=story&hitsPerPage=1000, checked 2 Oct 2026
  7. https://status.deepgram.com/, checked 2 Oct 2026
  8. https://deepgram.com/.well-known/security.txt, checked 2 Oct 2026
  9. https://www.cartesia.ai/, checked 20 Sep 2026
  10. https://docs.cartesia.ai/get-started/overview, checked 20 Sep 2026
  11. https://cloud.google.com/text-to-speech, checked 20 Sep 2026
  12. https://docs.cloud.google.com/text-to-speech/docs, checked 20 Sep 2026

Updated