Comodo Internet Security review
A free Windows security suite with sandboxing, firewall controls, and ransomware containment.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Comodo Internet Security is a Windows security suite for home and business users who want antivirus protection alongside firewall, intrusion prevention, application control, and file containment. Its free Premium version combines antivirus scanning and malware removal with a packet-filtering firewall, host intrusion prevention, automatic sandboxing, malicious-website filtering, secure shopping browser isolation, behavior analysis, parental website controls, and containment-based ransomware protection. The product is designed for a single Windows device and is not positioned as a cross-platform option.
Its main distinction is the layered handling of unknown files. Automatic sandboxing or containment can isolate unfamiliar applications, while application control and host intrusion prevention add further controls over software behavior. Cloud-based antivirus and behavior analysis extend detection beyond traditional scanning, and secure shopping provides a separate browser-isolation feature for online transactions. This makes the suite a fit for users who prioritize local control and containment features rather than a minimal antivirus-only installation.
The plan structure combines free protection with paid services. Premium includes the core security features, while Pro is listed at $29.99 per year and adds GeekBuddy support and a virus-free guarantee. Complete adds TrustConnect, cloud backup, and the Comodo Guarantee alongside the core security features. Buyers seeking free Windows protection can start with Premium; those wanting support or additional services can consider Pro or Complete. Users who need protection for multiple devices or platforms should choose a different product category fit.
Comodo Internet Security pros and cons
- Where it wins
- Free Premium plan includes firewall, sandboxing, and application control
- Containment protects against unknown files and ransomware behavior
- Adds web filtering, secure shopping, and parental website controls
- Where it doesn't
- Supports Windows only
- Protection is limited to one device
- Pro and Complete use legacy-style plan naming and add-on services
Comodo Internet Security fact sheet, pricing and score →
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