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Speaches vs Speechmatics: catalog facts
Speaches	Speechmatics
Free Free and open source under the MIT licence.	Freemium A free start is offered, with paid usage and enterprise plans through sales.
Self-hosted	Web
Drop-in replacement for OpenAI's speech and transcription endpoints Streaming transcription over SSE	Real-time and batch transcription in many languages Speaker diarization and identification
A server with an API, not an end-user app Setup is based on Docker	Built mainly for developers working with an API On-premises and enterprise options require contacting sales
Self-hosted	Hosted service
Open source	Closed source
License: MIT	License not stated
No account needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.