Doesn't seem like it, it's a GUI app that runs CLI commands and flags for ClamAV, which is separately installed, according to Mark Allan, the developer of ClamX

Doesn't seem like it, it's a GUI app that runs CLI commands and flags for ClamAV, which is separately installed, according to Mark Allan, the developer of ClamXav: https://www.clamxav.com/BB/viewtopic.php?p=2386#p2386 https://www.clamxav.com/BB/viewtopic.php?p=2386#p2386 ClamXav was never open-source, it was previously freeware/donationware.