Check out pw, my alternative to pass, designed because of the reason you mentioned: I don't want my password manager to leak the list of services I use.

https://github.com/gioele/pw

In pw each password database is a single file, the internal indexes are random IDs. Each line in a database is a serialized GPG file with a password and associated metadata.

The file format is git-compatible and everything can be managed with standard command line tools.