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
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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.
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Speechmatics provides REST and WebSocket APIs for batch and real-time transcription respectively. Key integration points and developer details include:
- Real-time API: WebSocket-based streaming with sub-350ms latency; suitable for live captioning, voice agents, and contact center tooling.
- Batch API: REST endpoint for file-based transcription jobs.
- Models: General-purpose
Meliamodel (from $0.12/hr); Enhanced model (up to $0.38/hr); Medical modelOak($0.15/hr). - TTS: $0.011 per 1,000 characters; first 1M characters free.
- Features included: Speaker diarization, custom vocabulary, punctuation, and formatting — no separate add-on fees noted.
- Deployment options: SaaS cloud, self-hosted on-premises, and on-device (edge) deployments supported.
- Compliance: HIPAA, GDPR, SOC 2 Type II, ISO 27001; no data logging by default.
- Integrations: Native support for LiveKit (real-time voice pipelines) and Adobe Premiere (media production).
- Pricing: Free tier includes $100 in credits, no card required. Pro plans via credit packs from $25 or monthly subscriptions. Volume discounts up to 25% off. Enterprise pricing available.
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