One of my users has been using clamxav for years, and is now being asked to upgrade to the new version which is now a subscription model like other anti-malware things.
I’m inclined to have him switch to one of the others that scans for more things since the security climate has changed over the last few years. Sophos is free and the officially sanctioned choice, but at least as configured by the university, takes up a lot of resources (and the config can’t be changed by mere mortals). In principle I like Malwarebytes, but some of features are windows only with Mac having the same price. I haven’t found any reviews I trust that cover the newer always-on version.