My choice would be Keybase, or at least something that uses Keybase as its back-end in some way.
Just want to say that I adore Keybase. I think it needs a password manager like bitwarden/lastpass/1password, but a lot of the features are compelling to me. I really hope it gets widespread adoption because the app and the company deserve it, in my opinion.
Yeah, it has some usability concerns, not yet at the level of Slack for large group work or onboarding speed, but I've found it very good for smaller groups of people and the rest of the features they've built on it are very cool and useful (at least for me).
Just want to say that I adore Keybase. I think it needs a password manager like bitwarden/lastpass/1password, but a lot of the features are compelling to me. I really hope it gets widespread adoption because the app and the company deserve it, in my opinion.