Proton Pass is open source and the company that runs it recently reincorporated as a Swiss non-profit to ensure their privacy mission can’t be bought out by venture capitalists etc.

https://www.reddit.com/r/ProtonPass/comments/153t85q/proton_pass_is_open_source_and_has_now_passed_an/?utm_source=share&utm_medium=mweb3x&utm_name=mweb3xcss&utm_term=1&utm_content=share_button

https://proton.me/blog/proton-non-profit-foundation