There is a license blurb in the readme.

> This code, apart from the source in core/third-party, is licensed under the MIT License, see LICENSE in this repository.

> The English-language models are also released under the MIT License. Models for other languages are released under the Moonshine Community License, which is a non-commercial license.

> The code in core/third-party is licensed according to the terms of the open source projects it originates from, with details in a LICENSE file in each subfolder.