Compare software

Speechmatics vs Cartesia: catalog facts
Speechmatics	Cartesia
Best for: Developers adding speech recognition to voice agents or transcription products	Best for: Developers building real-time voice agents and speech features
Free + paid options A free start is offered, with paid usage and enterprise plans through sales.	Paid Plans are listed on the pricing page, with a sales contact for larger deployments.
Web	Web
Real-time and batch transcription in many languages Speaker diarization and identification All 4 strengths for Speechmatics Real-time and batch transcription in many languages Speaker diarization and identification Cloud, on-premises and on-device deployment options Integrations with LiveKit, Pipecat, Vapi and Zapier	One API covers text-to-speech, transcription and voice agents Built for low-latency, real-time conversation All 3 strengths for Cartesia One API covers text-to-speech, transcription and voice agents Built for low-latency, real-time conversation Documentation for developers is published
Built mainly for developers working with an API On-premises and enterprise options require contacting sales	Mainly an API for developers rather than a consumer app Cloud only, with no local option All 3 limitations for Cartesia Mainly an API for developers rather than a consumer app Cloud only, with no local option Larger deployments go through sales
Hosted service	Hosted service
Not open source	Not open source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Sources for Speechmatics speechmatics.com Catalog checked October 2, 2026	Official website Full listing and sources Sources for Cartesia cartesia.ai Catalog checked September 26, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.