Speechmatics
Free tierLow-latency speech-to-text APIs powering multilingual, multi-speaker Voice AI
Free tier available·All audiences·API available
Key strengths
55+ language multilingual speech-to-text with a single modelSub-second real-time transcription (350ms latency)Enterprise security: HIPAA, GDPR, SOC 2 Type II, ISO 27001 compliantFlexible deployment: cloud, on-prem, on-deviceSpecialized medical model (Oak) for clinical conversationsSpeaker diarization and custom vocabulary includedNo data logging by default
Free tier + paid plans · from $0.12 USD/mo
Cambridge, United Kingdom
Founded 2006
Self-hostable
Facts verified against speechmatics.com on
Recent changes
- Plans updated: Free tier: $100 in credits, no card required. Pro: credit packs from $25 or monthly subscriptions. Transcription from $0.12/hr (Melia general purpose) to $0.38/hr (Enhanced). Medical model (Oak) at $0.15/hr. TTS at $0.011 per 1,000 characters (first 1M characters free). Volume discounts up to 25% off. Enterprise: custom pricing.
Get alerts when Speechmatics changes
Free. We'll email you when pricing, the free tier, API access or open-source status changes.
No ratings yet
Speechmatics is well-suited for the following developer and enterprise scenarios:
- Real-time voice agents & conversational AI: Sub-350ms streaming transcription via WebSocket enables low-latency turn detection and response in voice bots; integrates directly with LiveKit for WebRTC-based pipelines.
- Contact center analytics: Batch or real-time transcription of calls with speaker diarization to separate agent and customer turns; custom vocabulary for domain-specific terminology.
- Clinical documentation: The
Oakmedical ASR model handles clinical conversation transcription with HIPAA-compliant infrastructure and no default data logging. - Media & broadcast captioning: High-accuracy multilingual transcription across 55+ languages from a single model endpoint; Adobe Premiere integration supports post-production subtitle workflows.
- On-premises / air-gapped deployments: Self-hosting capability satisfies data residency requirements in regulated industries (legal, government, healthcare).
- Multilingual applications: Single-model multilingual support removes the engineering overhead of language detection and routing logic.
Alternatives
See all alternatives