Enterprise Voice AI: STT, TTS & Agent APIs for accurate, realistic, and cost-effective voice solutions.
Free plan available, paid tiers aboveVisit WebsiteThe Bottom Line
- Price
- Free plan available, paid tiers above. Compare plans
Key facts
- AI speech-to-text API
- Fast, accurate transcription
- Real-time and batch processing
Pros
- Fast transcription
- Good accuracy
- Real-time support
- Developer friendly
- Competitive pricing
Cons
- Newer player
- Language limitations
- Enterprise features limited
- Documentation gaps
- Smaller community
What is Deepgram?
Available on: Web
Ratings Across the Web
Deepgram holds an aggregate rating of 4.6 out of 5 from 475 reviews across G2, last checked August 26, 2026.
Ratings aggregated from independent review platforms. Learn more
Key Features
- Speech-to-text API
- Text-to-speech API
- Voice Agent API
- Audio Intelligence
- Custom model training
- Real-time streaming
- Self-hosted option
- Discord community
- 100+ languages
- Low latency
Pricing Plans
Free TrialPricing checked Oct 12, 2026
| Plan | Price | Details |
|---|---|---|
| Pay As You Go | $0 | Usage-based with $200 free credit (~43,000 minutes Nova transcription)
+10 more Show less
|
| Growth Popular | $4,000/year (minimum) | Pre-paid credits with up to 20% savings and higher concurrency
+7 more Show less
|
| Enterprise | Custom | Custom pricing for large volumes, specific deployment, or support needs
+1 more Show less
|
Is Deepgram worth the price?
Deepgram is the best-value speech AI platform for developers, and it is not close.
Nova-3 at $0.0077/minute ($0.46/hour) delivers accuracy rivaling OpenAI Whisper at roughly half the cost, with real-time streaming, speaker diarization, and 30+ languages. The per-second billing is a genuine differentiator: competitors like AssemblyAI and AWS Transcribe round to the nearest second or 15-second increment, which inflates costs 5-15% on short audio clips.
The Voice Agent API ($0.050-0.163/min depending on BYO components) positions Deepgram as a full voice AI stack, not just a transcription service. Main caveat: the older Enhanced and Base models are more expensive than Nova while being less accurate, always use Nova-3 or Flux unless you have a specific legacy reason.
Hidden Costs & Gotchas
Add-on features stack up
speaker diarization ($0.002/min) and PII redaction ($0.002/min) each add ~26% to the base Nova-3 price. A fully-featured transcription pipeline (Nova-3 + diarization + redaction + keyterm prompting) costs $0.0130/min vs $0.0077 base, a 69% premium.
Multilingual Nova-3 costs 19% more than monolingual ($0.0092/min vs $0.0077/min). If your audio is consistently in one language, always use the monolingual model to save.
Whisper Cloud (self-hosted Whisper model via Deepgram) is limited to 5 concurrent connections on all plans. If you need Whisper specifically at scale, you may need to self-host.
Growth plan requires a $4,000/year minimum commitment. Credits are pre-paid and redeemed against usage, if your usage drops, unused credits do not roll over (verify terms).
Audio Intelligence (summarization, sentiment, topics) uses a separate per-token pricing model ($0.0003-0.0006/1K tokens) that is difficult to estimate in advance since token count depends on audio content length and complexity.
Reviews
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Deepgram FAQ
How does Deepgram support real-time voice applications?
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How does Deepgram compare to AssemblyAI for transcription accuracy?
Source: deepgram.com