I was thinking of upgrading to #protonmail plus. But there is still missing an important part. Although they ve released the source code of the web client, the android app and the desktop bridge are still closed. Probably they have their reasons for not doing so. But e2e encryption without an end client that you truly control implies that you totally trust the app provider. This is a contradiction of e2e philosophy, designed to offer secure communications even in untrustworthy environments.