When comparing passacre vs Buttercup, the Slant community recommends Buttercup for most people. In the question“What is the best cross-platform password manager?” Buttercup is ranked 10th while passacre is ranked 13th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Lightweight
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 Can be installed with home brew
Pro Open source
There's a large base of developers who work on improving the software.
Pro Import other formats
Import passwords from other password managers including 1Password (.1pif), KeePass(.kdbx), and LastPass (.csv).
Pro Good UI
Pro It's free
As in beer.
Cons
Con Requires knowledge of the command line
To use passacre, some knowledge of the command line as well as Python is required.