It started as a community fork of KeePassX[3][4] (itself a cross-platform port of KeePass).

It is built using Qt5 libraries, making it a multi-platform application which can be run on Linux, Windows, macOS, and BSD.

KeePassXC supports having key files and YubiKey challenge-response for additional security.

[3] The Electronic Frontier Foundation mentions KeePassXC as "easy-to-use [and] robust software".

[10] An accompanying browser extension[11] is available for Firefox,[12] Tor-Browser, Google Chrome,[13] Vivaldi, Microsoft Edge,[14] and Chromium.