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Production-ready speech AI API with best-in-class accuracy, audio intelligence, and a Voice Agent platform.
Pros
- Very low base per-hour pricing
- Generous free tier (185 hrs pre-recorded)
- Strong audio intelligence add-ons
- Clean developer docs
Cons
- Add-ons stack up quickly to ~$0.45/hr
- Higher-tier model costs more for streaming
- Volume pricing requires sales contact
✓ Where it shines / best for
- Developers building transcription features with intelligence layer needs
- Healthcare apps needing Medical Mode compliance
- Teams building full Voice Agent pipelines
- Enterprises needing PII redaction and compliance
✕ Not the best fit for
- End users needing a consumer dictation interface
- Projects requiring sub-$0.10/hr commodity transcription pricing
- Users needing extensive language support beyond English-primary
Features
- ✓ Universal-2 and Universal-3 Pro models for pre-recorded and streaming transcription
- ✓ Streaming WebSocket API with billing by session duration
- ✓ Audio Intelligence add-ons: speaker ID, sentiment, entities, topic detection, summarization
- ✓ Medical Mode for healthcare transcription (+$0.15/hr)
- ✓ PII text and audio redaction
- ✓ Voice Agent API (STT + LLM + TTS in one endpoint)
- ✓ LLM Gateway supporting GPT-5, Claude 4.x, Gemini 3
- ✓ $50 free credit on signup; EU region at same price
Pricing
| Plan | Price | Billing | Notes |
|---|---|---|---|
| Free Credit | $50 | one-time | On signup; no credit card required; covers ~185 hours of Universal-2 transcription |
| Universal-2 (async) | $0.15 | per hour | Pre-recorded transcription; pay-as-you-go; ~$0.0025/min |
| Universal-3 Pro (async) | $0.21 | per hour | Higher accuracy model; $0.45/hr for streaming version |
| Voice Agent API | $4.50 | per hour | All-inclusive: STT, LLM reasoning, TTS, turn detection, interruption handling |
| Enterprise | Custom | annual | Higher concurrency, custom SLAs, dedicated support |
Pricing verified from the official source. Prices change often — confirm on the vendor's site before buying.
Specifications
| models | Universal, Universal-3 Pro, Slam |
| free_tier | 185 hrs pre-recorded |
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