Axum

The bitwarden vaults themselves are encrypted with your password. So I’m not sure what there is to not trust with bitwarden, as even if files were stolen, they are encrypted so they’re largely useless.

I pay for bitwarden premium because it supports the development of a good open source project.

Edit: fixed phrasing given suggestion below

Lol. 4 mil is absolutely nothing

If it’s just android, you may look at Headwind mdm

https://h-mdm.com/