What are some good Linux antivirus options besides ClamAV?

ESET has a Linux endpoint product, though it is aimed at business customers rather than the old standalone NOD32 for Linux. That older product is no longer supported.

Check the current distribution and version requirements before buying. Commercial Linux security tools often support a fairly short list of distributions, and a product meant for managed endpoints may be more than you need at home.

Elastic Defend is another option, particularly if you want endpoint monitoring rather than just a file scanner. It uses a centrally managed setup, so check what server infrastructure you would need. That may be a lot of work for one personal machine.

For a personal desktop, I would put the basics ahead of hunting for another scanner. Keep the system and browser updated, be careful with packages from unofficial sources, and use a firewall and browser ad blocker. Network-level filtering can be useful too.

That is not a guarantee against malware. It just addresses some ways unwanted software or attacks can reach the machine in the first place.

There's also a tradeoff with antivirus itself. A scanner may run with extensive privileges and process untrusted files, so vulnerabilities in it can create another way into the system. That doesn't make every scanner useless, but it is a reason to consider what protection it adds and keep it updated.

If free and open source real-time detection is the goal, that is a tougher request than finding an on-demand scanner. Check whether a candidate actually monitors files as they are accessed, rather than assuming real-time protection from the antivirus label.