You can self-host Bitwarden, too. My understanding is that VaultWarden is much simpler to self-host, though. Note that VaultWarden isn’t a “fork”; it’s a compatible rewrite in Rust (Bitwarden’s codebase, by contrast, is primarily C#).

I also use Bitwarden and strongly prefer it over every other password manager I’ve tried or investigated, for what that’s worth. I’d recommend it to 99% of non-enterprise users (it’s probably great for enterprise use as well, TBF).

The only use case I wouldn’t recommend it for is when you don’t want your passwords stored in the cloud, in which case KeePass is the way to go. To be clear, that recommendation does not apply if you’re syncing your vault with a cloud storage provider - even one you’re hosting, like SyncThing - even if your vault is encrypted. At that point just use Bitwarden or VaultWarden, because they’re at least audited with your use case in mind (Vaultwarden has only been audited once afaik, though).