ClamWin Free Antivirus
by ClamWin · Open source GPL virus scanner for Windows
BenchRank score
Screenshots of ClamWin Free Antivirus
Homepage
Overview
ClamWin Free Antivirus is a GPL-licensed virus and spyware scanner for Microsoft Windows, based on the ClamAV engine. It scans on demand rather than continuously, and includes a scheduler, automatic virus database downloads, right-click scanning from Windows Explorer and an Outlook add-in that removes infected attachments. The site states it is used by over 600,000 people daily.
- Best for
- Windows users who want a free, open-source on-demand scanner for viruses and spyware.
- Pricing
- No prices are shown; the software is free to download and use, with an optional donation to support development.
Strengths and trade-offs
Strengths
- Free of charge and open source under the GNU GPL
- Scan scheduler plus automatic virus database updates
- Right-click scanning in Explorer and an Outlook add-in
- Runs on Windows 98 to 10 and Server 2003 to 2012
Trade-offs
- No on-access real-time scanner; files must be scanned manually
- Windows only — no macOS or Linux version is mentioned
- Volunteer project funded by donations; help is via forums and mailing lists
How ClamWin Free Antivirus markets itself
A structured read of the promise, proof and page design on ClamWin Free Antivirus’s captured homepage.
Homepage capture
“Open source GPL virus scanner”
- Angle: Open source / ownership
- Hero: Typography only
Pricing
Published plans and prices from ClamWin Free Antivirus’s own pricing page.
How this score is made up
Each dimension is scored out of 100 and combined into the headline score using fixed weights.
MCP support
Whether an agent can drive the product through the Model Context Protocol, and how much setup that takes.
Documentation
Publicly reachable docs — coverage, freshness, code samples and machine readability.
Agent friendliness
How readable the site is to an automated client: llms.txt, structured data, server-rendered content, crawler access.
Changelog
A public, dated record of what shipped and when — the clearest signal that a product is still alive.
Marketing site structure
Whether the site answers a buyer's questions: clear positioning, the pages that matter, and accessibility.
Page speed
How fast the site loads for real visitors: Chrome UX Report 75th-percentile LCP, INP and CLS, with a Lighthouse mobile run standing in where a site has too little traffic for field data.
Operational trust
Status page and incident history, security disclosure, compliance and data-processing documentation.
Measured, but not part of the score
Useful to know, but not a mark for or against the product — so these do not affect the ranking.
Openness
Source availability, self-hosting, data export and open standards. Scored and shown, but not part of the composite — paid SaaS is not worse for being paid SaaS.
Maintenance
Release cadence and repository activity. Scored and shown, but not part of the composite — it is only measurable for open repositories.
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Where this comes from
The ClamWin Free Antivirus pages BenchRank reads when it scores the product — its documentation, release notes, status and security pages, and its repository where there is one.
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