The frontend parts are explicitly and correctly licensed under the Apache licens...

godelski · 2026-02-02T22:37:36 1770071856

They also have a FAQ: https://docs.mattermost.com/product-overview/faq-license.htm...

Note that they have multiple licenses. This isn't entirely uncommon. The difference licenses apply to different things.

mring33621 · 2026-02-02T22:37:08 1770071828

Ooh, I see it now, right in the middle:

"...You are licensed to use the source code in Admin Tools and Configuration Files (server/templates/, server/i18n/, server/public/, webapp/ and all subdirectories thereof) under the Apache License v2.0...."