When comparing Keeper Password Manager vs LessPass, the Slant community recommends LessPass for most people. In the question“What is the best cross-platform password manager?” LessPass is ranked 11th while Keeper Password Manager is ranked 20th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Available on all major platforms, OS & browser extensions
Keeper is available for download on Android, iOS, Windows, Mac, Windows Phone, Linux, Kindle, and Nook, and available as a browser extension for IE, Chrome, Firefox, Safari and Opera.
Pro Multiple certifications & security compliance
Keeper is a password manager that is certified and is security compliant with HITECH and HIPAA, SOC-2, TRUSTe, McAfee Secure, ES-EU Safe Harbor, PCI-DSS & U.S. Department of Commerce's Bureau of Industry and Security.
Note: These features are "NOT VERY EASY" to obtain.
Pro Open source
Pro Really platform-free
Works everywhere, in any device that can run javascript.
Pro Doesn't store passwords
If it's not stored, it can't be stolen.
Cons
Con Double authentication is nightmare
Con Confusing setup instructions
Con Deterministic
Deterministic password managers have many drawbacks.
Con Cannot store existing secrets
Existing secrets (aka passwords) cannot be stored with deterministic password managers. In order to use LessPass effectively, you will need to change your password on every site.
Con Easily cracked with exposed/compromised master password
Since anyone can use LessPass with the same parameters as you, all they need is your master password (which could be obtained through keylogging or numerous other methods) to gain access to every one of your site passwords.