Deepgram

Deepgram's Voice Agent API

A single, unified conversational AI API for building real-time, enterprise-ready, and cost-effective voice AI agents. Combines the simplicity developers want with the orchestration control enterprises need. No stitching together STT, TTS, and LLM orchestration. No black box limitations. Priced at $4.50/hr.

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Voice Agent API features

Powered by the industry’s fastest, most performant speech recognition and voice synthesis models, our voice agent stack delivers unparalleled performance and scale.

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Unified Voice Agent API

One API that combines speech-to-text, LLM orchestration, and text-to-speech in real time. Simplifies development by eliminating the need to stitch together multiple services.

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Conversational control

Built-in barge-in detection, turn-taking prediction, function calling, and mid-session control ensure smooth conversations without pauses or interruptions.

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Full model ownership

Deepgram controls the full voice stack across STT, TTS, and runtime orchestration for optimized latency, model tuning, and tightly synchronized speech-to-speech flow.

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Deployment flexibility

Deploy fully managed, dedicated single-tenant, in VPC, or self-hosted. Supports HIPAA, GDPR, regional data residency, and isolated runtimes for enterprise compliance.

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BYO LLM & TTS

Easily integrate your own LLM or TTS provider while retaining Deepgram’s orchestration, streaming pipeline, and real-time responsiveness.

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Scalable cost optimization

Flat-rate pricing at $4.50/hr with Deepgram’s full stack, plus built-in rate reductions for BYOM. Optimized compute efficiency lowers TCO for large-scale deployments.

Powering the future of real-time Voice AI Agents

Our Voice Agent API enables real-time conversational AI agents that seamlessly handle interruptions, take complex actions, and deliver natural, responsive customer interactions without delays or rigid turn-taking.

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Superior Conversation Quality

Deepgram ranked #1 overall in the VAQI composite index, outperforming all other providers in total conversational quality. Deepgram’s final VAQI score was 71.5, which is 6.4% higher than OpenAI and 29.3% higher than ElevenLabs.

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How to Measure Voice Agent Quality: Introducing the VAQI Benchmark

Affordable - Priced at $4.50/hour

Deepgram delivers complete voice capabilities at 24% less than ElevenLabs Conversational AI and 75% less than OpenAI’s Realtime API, with built-in discounts when you bring your own models.

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Bar chart comparing estimated hourly cost of real-time voice agent APIs, showing Deepgram at $4.50, ElevenLabs at $5.79, and OpenAI at $18.03

Start building real-time Voice AI Agents

Deploy conversational AI agents with one unified Voice Agent API, delivering natural conversations, real-time responsiveness, and full control over deployment, orchestration, and performance.