I would go for bitwarden[1]. It's free software, can be self hosted and is available on most platforms and has nice browser addons. If you want to go the self hosted route, you might want to look into bitwarden_rs[2] because it uses way less resources than the official server.

[1] https://bitwarden.com/

[2] https://github.com/dani-garcia/bitwarden_rs