When comparing Clipperz vs KeeWeb, the Slant community recommends Clipperz for most people. In the question“What is the best cross-platform password manager?” Clipperz is ranked 14th while KeeWeb is ranked 18th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Disposable one-time pass phrase for use on a public computer
Pro Open source
Clipperz has been around for many years as an open source project.

Pro Completely anonymous
Clipperz does not ask for any personal information, no email required, nothing.
Pro Encryption is client-side
Everything is encrypted in the browser and stored encrypted on the server.
Pro Can be run on own server
Clipperz can be run on a private server.
Pro Download local copy for backup in a pinch
Pro Its password databases are compatible with those of KeePass 2.x
KeePass 2.x *.kdbx password-databases (provided they are encrypted by AES-256 with AES key-derivation) are compatible with KeeWeb.
Pro Available as an online or offline app
There are Windows, Linux and Mac OSX offline apps.
Pro Supports WebDAV, Google Drive and OneDrive
Pro Syncs with Dropbox
Pro Supports 2FA
And it's Google Authentication compatible.
Cons
Con Backups are up to the user
There is no service with this application, it is up to the end user to backup all data.
Con Has to be running on a server to work
Unlike other password managers such as KeePass, Clipperz can not just be simply run by executing once downloaded. It has to be setup to run on a server and then can be accessed from the necessary devices.
Con Drab interface largely devoid of color
