When comparing HACT PassManager 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 HACT PassManager is ranked 42nd.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Plugins available (Chrome, Firefow, Opera)
Pro Easy to use
Pro Available from everywhere (simple website)
It's a simple javascript available from everywhere and that runs on all platforms. Passwords are generated on the device itself so they are never send over the network.
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 Passwords are always same length (20 characters)
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.