Since Keybase is being acquired by Zoom (see
https://news.ycombinator.com/item?id=23102430), it would be lazy to not start looking at alternatives already
I myself mostly use the following features from Keybase: Chat, KBFS, Git repositories and encrypting messages sent out-of-band via PGP in Keybase (and the various cryptographic tools [signing, validation etc])
What alternatives have the features outlined above, but are ideally either FOSS or at least not run by a for-profit company? I mainly used Keybase to make using those features easier, so please don't suggest the cli of gnupgp (or similar) as alternatives.
While all these features are individually nice, I kinda started to worry about Keybase as a product when they started bolting on stuff like this.
I think the key (pun intended) to stable & ongoing success in this space is to focus on doing one thing well. Keybase was incepted as a service for signing & validation. There's currently https://keys.pub for that. I'd be interested to hear if there's others.
For chat, there's a lot of competitors to choose from. I like Riot.im.
For KBFS, Tresorit has been mentioned. I signed up, but haven't been super impressed with their clients yet. I'm not sure what better options are out there.