Appears to be "open core" agpl https://github.com/mattermost/mattermost?tab=readme-ov-file https://github.com/mattermost/mattermost?tab=readme-ov-file Not sure

Appears to be "open core" agpl https://github.com/mattermost/mattermost?tab=readme-ov-file https://github.com/mattermost/mattermost?tab=readme-ov-file Not sure what isn't included in the core though.