Keybase Chat - End-to-end encrypted chat built into Keybase
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
Tauria - True end-2-end encrypted group calls for up to 50 people
Seald - Keep your conversations secure, everywhere.
PortaCrypt - Create portable encrypted documents on your Mac