[Someone1234]

Bitwarden is closer to a LastPass competitor in the sense that it combines the encrypted database management with cloud storage, so that you can trivially share the database across devices.

Keepass is only the encrypted database management component. If you want to share that database across multiple devices you have to combine it with a cloud storage service (DropBox, Google Drive, OneDrive, iCloud, etc).

The major advantage of Keepass is that hypothetically it could be a completely off-line system, you could manually copy the database via e.g. USB Stick to every device if you so wished.

[binomialxenon]

You don't strictly need a cloud storage service to keep multiple devices synchronized with Keepass, there are also options such as Syncthing or rsync.