> For the complete documentation index, see [llms.txt](https://docs.vultisig.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vultisig.com/help-and-legal/license.md).

# Vultisig software license

STMF License for Vultisig software. Open source license terms governing use, modification, and distribution.

Vultisig software is released under the **Software Terms and Modification Freedom (STMF) License**.

***

## STMF License Summary

The STMF License grants you the freedom to:

* **Use** the software for any purpose
* **Study** how the software works
* **Modify** the software to suit your needs
* **Distribute** copies of the original or modified software

### Conditions

* Include the original license and copyright notice
* State changes made to the software
* Derivative works must use the same license

### No Warranty

The software is provided "as is" without warranty of any kind.

***

## Full License Text

The complete STMF License text is available at:

* **Repository**: [github.com/vultisig](https://github.com/vultisig)
* **License file**: `LICENSE` in each repository

***

## Component Licenses

Vultisig incorporates open-source components with their own licenses:

| Component             | License    | Repository                                                                               |
| --------------------- | ---------- | ---------------------------------------------------------------------------------------- |
| mobile-tss-lib        | STMF       | [github.com/vultisig/mobile-tss-lib](https://github.com/vultisig/mobile-tss-lib)         |
| tss-lib (Binance)     | Apache 2.0 | [github.com/bnb-chain/tss-lib](https://github.com/bnb-chain/tss-lib)                     |
| dkls23 (Silence Labs) | MIT        | [github.com/silence-laboratories/dkls23](https://github.com/silence-laboratories/dkls23) |

***

## Contributing

By contributing to Vultisig repositories, you agree that your contributions will be licensed under the STMF License.

See contribution guidelines in each repository for details.

***

## Questions

For licensing questions:

* **Email**: <legal@vultisig.com>
* **GitHub**: Open an issue in the relevant repository

***

## Related

* [Terms of Use](/help-and-legal/terms.md)
* [Security](/help-and-legal/security.md)


---

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