It's 2018 and there's no single messaging/chat/instant messaging app that is/has:
* FOSS
* encrypted/security-aware
* plain-text export of all messages for all time
* search across all messages
@PifyZ I am 80% sure none of these have all 4 criteria, based on my searching! Happy to be proven wrong, but I know 100% that Singal doesn't, gitter doesn't, most stable XMPP implementations don't, and Riot (matrix imp) doesn't.