Smallest AI provides APIs for text-to-speech, speech-to-text, and voice agents.
Deepgram
Deepgram provides APIs for speech-to-text, text-to-speech, and voice agents for real-time voice applications.
About Deepgram
Deepgram provides APIs for speech-to-text, text-to-speech, voice agents and audio intelligence, aimed at developers and businesses building real-time voice applications. Its Flux models are described as conversation-aware, handling turn-taking, interruptions and conversational context, and the platform can be used in real time or in batch, in the cloud or self-hosted. A unified Voice Agent API combines speech-to-text, text-to-speech and LLM orchestration into a single API call.
Key features
- Speech-to-text API for real-time transcription and batch processing
- Text-to-speech with expressive voices and latency as low as 80ms
- Unified Voice Agent API covering STT, LLM orchestration and TTS
- Audio Intelligence extracts insight from conversations
- Conversation-aware Flux models handle turn-taking and interruptions
- Deployment in the cloud or self-hosted
Best for: Developers, product teams and enterprises building real-time voice agents, transcription or speech synthesis into their own products.
Good for
- Single API for speech-to-text, text-to-speech and voice agents instead of separate components
- Available in real time or batch, and in the cloud or self-hosted
- Offers separate paths for API builders, platform partners, and enterprises with custom compliance needs
Watch out for
- Homepage does not state pricing or plan details
- Free Flux TTS access is capped at up to 45 concurrent streaming connections in the US and 5 in the EU and AU, and runs only through September 12th
- Custom models and compliance-focused deployments require contacting sales rather than self-service
Deepgram at a glance
- Website
- deepgram.com
- Category
- AI & Machine Learning › AI Speech Transcription
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Deepgram alternatives
Tools and sites you could use instead, ranked by how closely they match.
RecCloud combines speech transcription, text-to-speech, subtitle generation, video translation, and other audio and video editing tools.
Otter AI Meeting Agent supports real-time transcription, live chat, automated summaries, insights, and action items.
Speech to Note records speech, transcribes it, and organizes voice notes across Mac, Windows, mobile, and web.
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Deepgram FAQ
Can Deepgram be self-hosted?
The homepage states the platform is available in real time or batch, in the cloud or self-hosted.
Are there concurrency limits on free Flux TTS use?
Yes. Free access through September 12th allows up to 45 concurrent streaming connections in the US and 5 in the EU and AU.
What does the Voice Agent API include?
It unifies speech-to-text, text-to-speech and LLM orchestration into a single API, with business logic and external systems connected around it.
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