[SylvieLorxu]

I see SimpleLogin mentioned in the replies several times, but I haven't seen anyone mention that you can use your own domain name with them to prevent vendor lock-in.

You can also export your setup through their API so you can very easily migrate to a self-hosted instance if ever necessary:

wget --header "Authentication: YOUR_API_KEY" https://app.simplelogin.io/api/export/aliases -o simplelogin-export-$(date +%s).csv

And given the author talks about Have I Been Pwned, I feel I should mention that SimpleLogin has built-in HIBP integration (contributed by me in https://github.com/simple-login/app/pull/472)