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FreemiumAPI
Stitching together a separate STT model, a TTS engine, and an LLM layer for a voice agent means three latency budgets, three failure surfaces, and three vendor contracts — Deepgram exists because that stack collapses under real conversational load.
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Screenshots 2
Summary
Deepgram provides a Speech-to-Text API, a Text-to-Speech API, and a Voice Agent API that the vendor describes as a single unified pipeline — STT, LLM routing, and TTS through one API call rather than three chained requests. The Flux STT and Flux TTS models are described as conversation-aware, designed to handle turn-taking and interruptions natively. Cloud deployment is the standard path; the vendor mentions self-hosted availability specifically for enterprise custom-model engagements, not as a self-service option. At free-tier volumes the API is accessible immediately, but teams building compliance-sensitive or regulated-industry workflows will hit gating on custom model access and require a sales conversation before deployment.
Bottom line: Deepgram is the right call when you need a low-latency real-time voice agent API and can run in their cloud — it breaks as a path when your compliance team requires on-premise data residency without enterprise contract overhead.
Pricing Plans
Usage-BasedLast verified 1 week ago- Free Tier
- $200 Credit then pay-as-you-go
Free
Free
No minimums. No expiration. No credit card required.
- All endpoint in public models
- Up to 50 concurrency for Speech-to-Text REST API
- Up to 150 concurrency for Speech-to-Text WSS API
- Up to 45 concurrency for Text-to-Speech REST API + WSS API
- Up to 45 concurrency for Voice Agent API WSS API
- Up to 10 concurrency for Audio Intelligence REST API
- Community & Discord Support
- Standard Uptime SLAs
Growth
per month
$4,000/yr
Save up to 20% With pre-paid credits for the year. Credits are redeemed against actual usage.
- All endpoints in public models
- Up to 50 concurrency for Speech-to-Text REST API
- Up to 225 concurrency for Speech-to-Text WSS API
- Up to 5 concurrency for Deepgram Whisper Cloud
- Up to 60 concurrency for Text-to-Speech REST API + WSS API
- Up to 60 concurrency for Voice Agent API WSS API
- Up to 10 concurrency for Audio Intelligence REST API
- Community & Discord Support
- Standard Uptime SLAs
- Discounted pricing on Speech-to-Text, Text-to-Speech, Voice Agent API, and Audio Intelligence
Enterprise
Custom
For businesses with large volumes, data or deployment requirements, or support needs.
- Custom pricing
- Contact Sales for details
View full pricing on deepgram.com →
Pricing may have changed since last verified. Check the official site for current plans.
Find your fit
Before you choose Deepgram
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Pros
- Unified STT-LLM-TTS pipeline in a single API call, which means teams avoid the compounding latency and error surface of chaining three separate vendor APIs together.
- Conversation-aware Flux models handle interruptions and turn-taking natively, so voice agents don't break when a user cuts off a response — the failure mode that makes generic transcription APIs unusable for live conversational products.
- Real-time and batch modes on the same API, so the same integration handles a live support agent and an overnight compliance transcription job without switching providers.
- Provider-level audio intelligence features — diarization, speaker separation, compliance monitoring — available through the same API surface, so teams avoid bolting on a separate analytics layer for meeting or call-center workloads.
- Freemium entry with pay-as-you-go pricing above the free credit threshold, which means a prototype can go to production without a procurement cycle blocking the first real traffic.
Cons
- Self-hosted deployment is not a self-service option: the vendor page describes it as part of an enterprise custom-model engagement requiring a sales conversation. Teams with data-residency requirements that cannot route audio through Deepgram's cloud hit this wall before writing a single line of integration code — and at that point they evaluate on-premise-first alternatives like AssemblyAI's self-hosted offering or open-source Whisper deployments.
- Custom model training and enterprise compliance configurations are behind a sales gate, not accessible through the standard API tier. A startup that outgrows the default models and needs domain-specific accuracy — medical terminology, heavy accents, proprietary jargon — faces a contract negotiation rather than a dashboard setting.
- The concurrent streaming connection cap on the Flux TTS free-access period (the vendor states 45 globally, 5 in EU/AU) means load testing a real-time voice product at scale requires moving to paid access before you have production validation of the model's behavior under your specific traffic patterns.
About
- API Available
- Yes
- Self-Hosted
- No
- Last Updated
- August 14, 2026
Best For
Who it's for
- Developers and startups
- Growing applications
- Enterprise-scale deployments
- Real-time voice solutions
What it does well
- Real-time transcription for applications
- Voice assistants and conversational AI
- Audio analysis for insights and compliance
- Multi-speaker meeting transcription
Frequently Asked Questions
- Is Deepgram free?
- Deepgram offers a free option alongside paid upgrades. Check the current allowances and terms before choosing a plan.
- Does Deepgram have an API?
- Yes. Deepgram exposes a developer API. See the official documentation at https://deepgram.com for details.
Stitching together a separate STT model, a TTS engine, and an LLM layer for a voice agent means three latency budgets, three failure surfaces, and three vendor contracts. Deepgram supplies a single API call that routes STT, LLM, and TTS together.
Core capabilities
The Flux STT and Flux TTS models handle turn-taking and interruptions natively. Real-time and batch modes run on the same integration. Audio intelligence features support analysis and compliance checks. The vendor states self-hosted options exist only inside enterprise custom-model deals, not as a self-service path.
Pricing and limits
Usage-based pricing starts with a $200 credit on the pay-as-you-go plan. Free-tier concurrency caps are listed as 50 REST or 150 WSS for STT, 45 for TTS and Voice Agent, and 10 for Audio Intelligence.
Who it is for / who should skip it
Developers and startups building real-time voice solutions or multi-speaker transcription fit the listed best-for profile. Teams needing immediate self-hosted deployment or sales-free custom model training should skip it and review on-premise-first alternatives instead.
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