Speechmatics
Free tierLow-latency speech-to-text APIs powering multilingual, multi-speaker Voice AI
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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 is a speech-to-text and text-to-speech API platform built for developers and enterprises requiring production-grade voice AI. Its core ASR engine supports 55+ languages within a single model, eliminating the need to route requests to language-specific endpoints. Real-time transcription delivers sub-350ms latency, making it suitable for low-latency streaming applications. The platform exposes REST and WebSocket APIs, supports cloud, on-premises, and on-device deployment, and ships with speaker diarization and custom vocabulary out of the box. A specialized medical ASR model (Oak) targets clinical conversation transcription. Compliance certifications include HIPAA, GDPR, SOC 2 Type II, and ISO 27001, with no data logging enabled by default. Integrations include LiveKit (real-time communications) and Adobe Premiere (post-production workflows).