@Tutanota@mastodon.social @firefox @torproject@mastodon.social @yubico@infosec.exchange @signalapp@mastodon.world @bitwarden@fosstodon.org @ecosia@mastodon.social @nextcloud@mastodon.xyz @StartpageSearch@mastodon.social @ublockorigin Threema is not recommended. It is centralised, paid, and does not have practical benefits over XMPP with OMEMO enabled. Signal is superior for its encryption but has KYC. Anyone who wants true security and privacy for chats and their matamata involved should use SimpleX instead. For a balance of security/privacy and convenience I will go for XMPP.