I've been using Protonmail since 2018, but I have never used any personal login/password manager prior to this. Proton Pass is brilliant with several advantages (Open-source audited code, end-to-end encrypted service, added functionality as time goes on).

Just like the rest of the Proton ecosystem, Proton Pass is also free, which is possible due to paying users like me.

Their e-mail alias creation system (proxy/cloak e-mail service) works nicely and is well integrated to my Protonmail account.