When comparing passacre vs LessPass, the Slant community recommends LessPass for most people. In the question“What is the best cross-platform password manager?” LessPass is ranked 14th while passacre is ranked 15th. The most important reason people chose LessPass is:
Ranked in these QuestionsQuestion Ranking
The utility itself has no GUI, and is written in Python, so it’s portable and has few dependencies.
Pro Requires little to no storage
Passacre needs only a configuration file to tell it how to hash passwords, what kind of output it should produce, and which sites need specific generation rules. There’s no database where passwords are stored, so it’s not possible to be locked out of everything if that file is lost.
Pro Really platform-free
Pro Doesn't store passwords
If it's not stored, it can't be stolen.
Pro Open source
Con Requires knowledge of the command line
To use passacre, some knowledge of the command line as well as Python is required.
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.
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.
Deterministic password managers have many drawbacks.