It had excellent chat functionality that worked well, and this was at a time in which the Signal client for Android was still quite buggy (hundreds of Bad encry

It had excellent chat functionality that worked well, and this was at a time in which the Signal client for Android was still quite buggy (hundreds of Bad encrypted message messages flooding group chats, messages delivered hours late and all at once, poor performance etc.) My group naturally gravitated towards Keybase as our secure messaging platform. The other killer feature was KBFS, which was a sort of shared encrypted filesystem with which you could sync files securely across all of your devices, share files publicly or with specific users or sets of users or groups in cryptographically protected ways. The unintelligible foray into cryptocurrency with Lumens made very little sense to me, but apparently the coins I was gifted for free by Keybase are worth over 100 USD now. I'll probably hold on to them.