This is where your lack of understanding of the open source thing is readily apparent to everyone arguing with you. If it was backdoored, many people would be calling that out. In fact, this was one of the exact reasons at the heart of the original concerns leading to this story.

The fact that the source is available means that we can see exactly how the data is encrypted, allowing assurances to be made independently.

If nothing else, I trust Bitwarden MORE because of that and I’m happy to pay them for their services since it helps find further development.

Free cookie recipe not really free because oopsie! Man fixed it now. Cookie recipe is free again! Yay!