Please reconsider these advice's.

#Brave: just some days ago they announced to cooperate with IOHK, who's CEO and billionaire? Charles Hoskinos campaigned for Trump and helped JFK. Jr. to gain office.
Not to forget about the homophobic statements done in the past by it's founder Brendan Eich.

#Session: just don't for the reason it's popular among child abuser, for reasons. Not to forget their shitcoin grifting.

#Threema: markets their product towards fascists.

Consider instead:
@xmpp , @cwtch @briar , irc, @delta