Vaultwarden is a great piece of self hosted server software, which meshes with Bitwarden software perfectly. And for people who can't self host, IMO Bitwarden gives you more than enough bang for your buck with their own hosting plans.
It's one of the few examples of software being open source and ethically making money regardless. (For comparison, Standard Notes has tried pretty hard to make sure non-paying users have an inferior experience even if they self-host literally everything.)