If you're looking for something that's offline first go for pass [0], gopass [1], or any keepass-compatible [2][3][4] password manager and sync the database yourself.

[0]: https://www.passwordstore.org/

[1]: https://www.gopass.pw/

[2]: https://keepassxc.org/

[3]: https://www.keepassdx.com/

[4]: https://strongboxsafe.com/