ClamAV is a free, open-source antivirus tool that allows public scrutiny of its code, ensuring security and integrity. It is compatible with multiple platforms, including Linux, Windows, and macOS, and is suitable for self-hosted servers and virtual machines. ClamAV includes features like SigTool for managing the virus signature database and ClamBC for advanced dynamic detection capabilities. It operates through a command-based interface, which may be intimidating for some users, and requires initial configuration. Despite its thorough scanning process, it may not perform as quickly as other antivirus solutions. ClamAV is recognized for its ability to identify a wide array of potential threats without financial investment.