When comparing Cockatoo 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 Cockatoo is ranked 43rd.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Simple password modifiers
Just two optional prefixes to adapt password to each site's complexity requirements
Pro Graphical input method as an option
Gestures allow to remember more with a way less effort
Pro Cross-platform solution
Available as an autonomous web-app + as an add-on for Chrome, Opera and Firefox (desktop and mobile)
Pro Free, open-source
Fully transparent code, which everybody can inspect thoroughly
Pro Industry-accepted hash function
It's based on the famous KDF "scrypt"
Pro No clouds, no vaults
All passwords can be cryptographically derived from a single secret gesture (or a master-password)
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.