I've cancelled my subscription yesterday, conveniently it was about to renew at the end of the week, so I have a few days to migrate from Proton, here's what I'm thinking of, but I'd love to hear what other people are switching to
I would maybe hold off on choosing Bitwarden. Around the time they raised their pricing they started getting venture capitalist money so the enshittification there may be coming. As far as alternatives, the only other one I've used besides Proton is KeePass which could be make or break depending on how you setup the vault, I'd probably save it in something pCloud so you aren't screwed should something happen to your server, but YMMV.