ClamAV

ClamAV is an open source antivirus engine for detecting trojans, viruses, malware, and other malicious threats. It scans files and content as part of desktop, server, and mail gateway workflows.

It includes a multi-threaded scanner daemon, command-line utilities for on-demand scanning, and automatic signature updates. It supports many file formats and signature languages, plus file and archive unpacking, and anyone can write custom detection signatures.

ClamAV runs on Linux, macOS, and Windows, with packages for Debian and RPM, a macOS PKG installer, and Windows MSI and ZIP packages. It can also run in Docker or be installed from common package managers. ClamAV is licensed under GPLv2 and maintained by Cisco Talos.