Selfhosted

If you don't have a hard requirement of it being fully (!) OpenSource, then I would recommend Enpass. Relatively pleasing UI that runs native on Win, Mac, Linux, Android and iOS. It has browser plugins for Chrome and Firefox that talk directly to the running fat client (so no multiple authentication with different browsers necessary).

The password db is completely local, but it offeres several sync mechanisms like WebDAV or Dropbox or also iCloud; basically whatever can store files. If it's a NAS in your home, it simply will sync once you are back home.

It also offers "WiFi Sync", in which case you designate one machine running Enpass as the server and link other clients to it, then you don't even need to run a separate hosting for it (but that machine needs to be on and running Enpass when you want to sync, obviously).

It's basically a less open but much more convenient and beautiful KeePass(XC).

I don’t really see the problem with having the password manager in the cloud if it is protected by 2FA. I tried vaultwarden (self hosted) about a year ago and the showstopper was that I couldn’t store a new password when off LAN or without first connecting the VPN. I am sure there are on demand vpn type services, but it was clunky. It would have been great it if would work locally on the phone then sync the password to the vault when it came back online

Self hosting a password manager is great, but be sure to read up on keeping it secure, and don’t store anything important in it until you have working, tested backup solution. And re-test it frequently in a non-destructive way.

If you lose your password storage to a disk failure or something, you’re gonna be hurting for a while.

just have 1 password for everything, problem solved.

i have keepass on only one device. i don't mind looking up individual passwords and typing them in manually when on other devices.

on the device which hosts keepass, the app is hidden and hoops must be jumped to reach it.

i back up the encrypted password database once a month to a cloud service as insurance against me losing that one device.

it's not the most convenient setup but i sleep so much easier for it.

Is the data super important to you?

Let someone else host it.

~~Bitwarden in the cloud.~~

Edit: Bitwarden paying the monthly/yearly fee to BW. I wasn’t implying trying to host it yourself in the cloud.

If you’re happy with how Apple Password works for you, I can recommend StrongBox. It keeps all data in a KeePass2 database and integrates into Apple’s AutoFill API. That means it feels almost native when using it. No browser plugin needed. (At least not for Safari.) And you can decide how you sync the database file.

I use keepass (KeepassXC on desktop, KeepassDX on Android but I'm sure there is an IOS client too) I sync the database between all my devices and my server (hub and spoke) with Syncthing

Seafile or nextcloud

Bitwarden/vaultwarden is a popular option for selfhosters.