# Sesame CSM

Open Apache-2.0 conversational speech model generating context-aware, natural speech. Sesame CSM is free, with no paid plan attached, at github.com.

## Facts

- **Pricing tier:** Free
- **Works on:** Self-hosted
- **Works in browser:** No

## Capabilities

- 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

## FAQ

### What is Sesame CSM?

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.

### Is Sesame CSM free?

Sesame CSM is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 397 entries on Flocci AI Tools with no upgrade path built in.

### Can I use Sesame CSM in a browser, or is there an app?

Sesame CSM needs to be installed or self-hosted — it doesn't run in a browser tab. It is available on self-hosting.

### What can Sesame CSM do?

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.

### What is the best free alternative to Sesame CSM?

Copilot Audio Expressions is the closest free alternative: it sits in the same AI Voice & Speech sub-category and is free. Kokoro Web, Zonos and Chatterbox (Resemble AI) also start free. The full list is on the alternatives page.

## Related

- [Sesame CSM alternatives](https://aitools.flocci.in/alternatives/sesame-csm)
- [AI Voice & Speech](https://aitools.flocci.in/category/content-media-generation/ai-voice-speech)
- [Best free AI voice and text-to-speech tools](https://aitools.flocci.in/best/best-ai-voice-speech)
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Source: Flocci AI Tools — https://aitools.flocci.in/tool/sesame-csm

Facts last verified: October 2026