Mattermost does offer transport level encryption, via HTTPS. For most things, that's plenty good enough. But for many organizations, they want unlimited viewi

Mattermost does offer transport level encryption, via HTTPS. For most things, that's plenty good enough. But for many organizations, they want unlimited viewing of the messages anyway, so E2E would be a non-starter. It all depends on your needs. Mattermost would never be a good solution for a global chat system, nor would it be a good fit for wide-open public/untrusted access chat either, both of those are where E2E type encryption would really shine.