There are a few reasons why I don't use stuff like 1Password or LastPass:

- Not open source (or in part, e.g. the server side is closed);

- Uploads stuff to the cloud (I want to self-host);

- Not available on mobile;

Bitwarden sounded quite good at first: mobile, sync and open source. I can inspect the code and run the web part (the vault, they call it) myself. Then I had a look at the web part:

https://github.com/bitwarden/web/blob/master/src/Web/Program...

It's C#. I'm not going to run a Windows Server just for this.