Compare software

Cartesia vs Kokoro-FastAPI: catalog facts
Cartesia	Kokoro-FastAPI
Paid Plans are listed on the pricing page, with a sales contact for larger deployments.	Free Free and open source under the Apache 2.0 licence.
Web	macOS, Linux, Self-hosted
One API covers text-to-speech, transcription and voice agents Built for low-latency, real-time conversation	OpenAI-compatible speech endpoint Prebuilt multi-architecture Docker images with models included
Mainly an API for developers rather than a consumer app Cloud only, with no local option	AMD GPU support is experimental Apple Silicon has no prebuilt image
Hosted service	Self-hosted
Closed source	Open source
License not stated	License: Apache-2.0
Account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 26, 2026

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