When comparing Yith Library vs KeeWeb, the Slant community recommends KeeWeb for most people. In the question“What is the best cross-platform password manager?” KeeWeb is ranked 18th while Yith Library is ranked 28th. The most important reason people chose KeeWeb is:
KeePass 2.x *.kdbx password-databases (provided they are encrypted by AES-256 with AES key-derivation) are compatible with KeeWeb.
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Pros
Pro Allows setting up own server
Yith Library's server code is available on Github along with instruction on how to set it up. It requires enough knowledge to set up and run a server in a virtual Python environment.
Pro Passwords are encrypted client-side
Yith Library uses client side JS encryption to ensure that passwords never travel in clear text.
Pro Free and open source
Yith Library is licensed under AGPL with source code available on GitHub.
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 Poor user experience
Yith Library is confusing. It's hard to navigate, it ask for permissions without explaining why or how those permissions will be used, none of the UI elements are explained and the language is iffy at best.
Con Drab interface largely devoid of color
