For maximum security (no cloud sync): KeePassXC
In both cases an essential feature applies: if you forget your master password you've lost access to your password database.
Bitwarden (optionally with self-hosted Vaultwarden) - Best UX for the FOSS options, syncs all your devices, overall just pretty good.
Website: https://bitwarden.com/
Vaultwarden: https://github.com/dani-garcia/vaultwarden
KeepassXC (optionally synced with syncthing or your cloud provider of choice) - Portable, no need to host a server to keep the database, offline-first. Database format is standardized, and other password managers support the database format. Desktop: https://keepassxc.org/
Android: https://www.keepassdx.com/
iOS: https://strongboxsafe.com/
Syncthing: https://syncthing.net/
pass, if you're always on the terminal. (optionally synced with syncthing or any cloud provider). Or you can go with gopass, which uses the same database format, has better support for multiple users/stores, and enables git versioning by default. There are GUI and mobile clients available that are compatible with this database format. pass: https://www.passwordstore.org/
gopass: https://www.gopass.pw/
These are the main ones I would recommend you take a look at for the most common use-cases. I can't recommend anything that doesn't provide FOSS clients or that can't be self-hosted, so some decent options UX-wise were excluded. You really have to see what you want out of the password manager to choose one. Keep in mind that for both pass and keepass there are multiple clients that are compatible with the database format, that affords you with more portability, options, and the possibility of having native clients.
However, I have just started exploring using vaultwarden (a rust rewrite of bitwarden, which is self-hosted).
I sync via WebDAV on my Synology NAS and I’m not really worried to lose anything since every synced device has a full copy of the data.
Thought about switching to 1password a few months back since we’re using it at work and the client is better but they don’t have an Enpass import. It supports some kind of CSV transfer but I don’t want to pay for a bunch of, worst case scenario, not really perfectly structured data so I decided to stick with what I have.
Edit: when thinking of switching I was a little nitpicky. I’m pretty happy with Enpass everything considered. 1p client is just even better but with the give them your data and your money thing, which I’m not necessarily fond of
"no-nonsense, ad-free, tracker-free, and cloud-free manner. Free and open source."
Pair with Syncthing to go across devices.
Even “opensource” apps such as strongbox and keepassium have no way of asserting that whatever code they publish on GitHub is the same that I’m installing through the AppStore.
Am I just overly paranoid?
This is the main hindrance for me to using KeePassXC everywhere. If I’m going to blindly trust anyone I prefer to trust apple keychain.
Kepass kdb file compatible but can access through browser interface. Backup kdb file to cloud storage.
Don't like bitwarden. Keeping your encrypted password file in Google drive is much better and portable than self hosting on your own server.
There is also Passage, which is a similar offering, but I have problems with Yubikey PIV PIN caching (and prefer CV25519 to NIST curves).
i have very little confidence recommending anything other than bitwarden/vaultwarden or keepassxc