ClamAV

About

Clam AntiVirus (ClamAV) is a free and open-source (GPL) anti-virus toolkit primarily designed for UNIX systems, specifically for e-mail scanning on mail gateways. It provides a flexible and scalable multi-threaded daemon, a command-line scanner, and advanced tools for automatic updates. Key features include being lightweight, privacy-focused with no tracking, and offering malware analysis, a graphical user interface, dark mode, and offline functionality. While it is owned by Cisco, as noted in user reviews, it is praised for being 100% free, fast, and open source. However, some users have reported concerns about its detection efficacy, describing it as being in an 'early alpha version for decades' and recognizing 'nothing,' or encountering installation and database update challenges, including Cisco's action of blocking database access for certain regions. It's also highlighted that its utility on Linux often extends to scanning files for Windows users in a networked environment to prevent the spread of infected files. Despite some criticisms, ClamAV remains a notable open-source solution for security on Mac, Linux, and BSD platforms.