You could look into prose. The interface of slack/discord/mattermost, built on XMPP, with E2EE.

Bitwardens local cache does not include attachments, though. If you rely on them, you have to rely on the server being available.

So “it’s weird then”. As I said. And basically as the person I answered to said.

Yeah but why not both? Extra support shouldn’t hurt.

… each time the server restart and randomly during login.

They already accept donations as a means of continuous support. So I guess this is now just another channel for people who prefer buying a license over using github donations.

Edit: oh I just realized they stopped donations with the restructuring. Ok, that’s weird then.

I am surprised that no one mentioned snikket yet, which is essentially a distribution of Prosody with sane defaults and a custom client.