Open Apache-2.0 conversational speech model generating context-aware, natural speech
Sesame CSM is listed under AI Voice & Speech, in the Content & Media Generation category on Flocci AI Tools. Open Apache-2.0 conversational speech model generating context-aware, natural speech. It is free, with no paid plan attached, and it lives at github.com.
Sesame CSM is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 399 entries on Flocci AI Tools with no upgrade path built in.
Sesame CSM does 3 things the catalog singles out: Open apache-2.0 conversational speech model generating context-aware, natural speech; takes prior dialogue turns as context for prosody; weights on hugging face; base for the sesame voice companion.
Chatterbox (Resemble AI) is the closest free alternative: it sits in the same AI Voice & Speech sub-category and is free. Copilot Audio Expressions, CosyVoice and F5-TTS also start free. The full list is on the alternatives page.
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