Overview

The suite combines antivirus, host intrusion prevention, a packet-filtering firewall, and automatic sandboxing. Unknown files run in an isolated environment, reducing their ability to affect the computer. Cloud scanning, behavior analysis, and whitelisting add further layers to its security approach.

Malicious Website Filtering blocks dangerous sites and lets users create custom block lists for family members. Comodo also directs users to technical support, an online help guide, and a user forum.

Key features

Auto Sandbox: Unknown files run apart from the rest of the computer. This is useful for people who encounter unfamiliar downloads, though remediation automation is manual.
Firewall: Users can block unauthorized inbound and outbound connections, control which programs access the internet, and stealth ports. That makes it more configurable than antivirus-only protection, but it also gives users more decisions to manage.
Secure Shopping: An isolated browser session includes keylogger prevention, screen-capture blocking, and SSL certificate inspection. It can also run applications such as email clients, password managers, spreadsheets, FTP clients, and VPN clients in the isolated environment.
Web filtering: Dangerous websites can be blocked, and custom lists offer a way to tailor filtering for family members.
Recovery tools: Offline scan mode, threat quarantine, and bootable rescue media provide options for handling infected systems. The listed remediation approach is manual, so these tools do not amount to automated cleanup.

Pricing

Comodo uses a freemium model, with a free plan and paid plans from $29.99/yr. The free Comodo Internet Security Premium plan costs 0.00 USD per free and provides core security features for a Windows PC. It is the clearest fit for a single Windows user who wants the basic suite without paid support or add-on services.

Comodo Internet Security Pro for one device costs 29.99 USD per year, billed $29.99 for 12 months. The three-device Pro plan costs 39.99 USD per year, billed $39.99 for 12 months. Both add GeekBuddy expert support and a virus-free guarantee covering repair costs up to $500 if Comodo support cannot restore an infected PC. The three-device option is the more practical paid choice for a small household; the one-device plan suits someone prioritizing the support promise on one PC.

A separate Pro plan is priced at 39.99 USD per year, billed annually, and includes GeekBuddy expert support and the virus-free guarantee. Complete costs 89.99 USD per year, billed annually, and adds 50GB of online storage and 10GB/month of TrustConnect. These fit users seeking those specific services, but the added storage and monthly allowance distinguish Complete rather than expand the stated security features. Premium includes antivirus, firewall, security features, and updates, but has no published price beyond the separate free edition above; custom pricing applies.

Platforms

Comodo Internet Security is for Windows. The guide lists Windows 10, Windows 8, and Windows 7; version 12.0.0.6882 and later do not support Windows XP or Vista. For Windows 10, the stated minimums are 384 MB available RAM, 210 MB disk space, an SSE2-capable CPU, and Internet Explorer 5.1 or later. This is not a cross-platform choice for people needing protection on macOS, Linux, or mobile devices.

Who it's for

Choose Comodo if you want a Windows security suite that pairs antivirus with configurable network controls, isolated unknown-file execution, and a protected shopping session. The free edition is compelling for users comfortable managing security tools themselves. Paid Pro is more relevant when GeekBuddy support and the repair-cost guarantee matter; Complete is for those who also want its specified storage and TrustConnect allowances.

Look elsewhere if you need current Windows versions beyond those listed, another operating system, or automated remediation. Users who want only straightforward antivirus protection may also find the firewall and isolation controls more involved than they need.

Pros and cons

Pro: The free Windows edition includes core security features, rather than reserving the basic suite for paid customers.
Pro: Firewall rules, automatic isolation of unknown files, and Secure Shopping cover different risks in one product.
Pro: The Pro guarantee offers repair-cost coverage up to $500 if Comodo support cannot restore an infected PC.
Con: Support and the guarantee require a paid Pro plan, and the guarantee is tied to Comodo support being unable to restore the PC.
Con: The supported operating-system list is limited to Windows 10, 8, and 7, with XP and Vista unsupported in version 12.0.0.6882 and later.
Con: Remediation is manual, so users should not expect the listed recovery tools to handle cleanup automatically.

Alternatives

For firewall-focused comparison, browse Firewall Management Software; for malware cleanup, see Malware Removal Software; for broader antivirus choices, see Antivirus software.

pfSense is worth considering when a free, open-source Community Edition and web or Linux platform support are more relevant than Comodo's Windows suite. Choose WatchGuard FireCloud if you need its broader platform coverage and are prepared for a paid plan; its listed one-year, 1–50 license plan is 97.75 USD per year per user license.

CacheGuard-OS is another freemium option for web or Linux. AlgoSec is a paid alternative spanning API, Linux, self-hosted, and web environments, with buying information by request. Check Point DDoS Protector is a paid option for Linux, self-hosted, or web environments. Forcepoint ZTNA is a paid alternative with macOS, self-hosted, web, and Windows support, with pricing by request. FireMon is a paid option with API, Linux, self-hosted, and web support; its Cloud Defense Pro plan costs 200.00 USD per month per cloud account. Google Cloud Firewall Policies is a freemium alternative for web.

Verdict

Comodo Internet Security is a strong fit for Windows users who want a free suite with firewall control, sandboxing, web filtering, and isolated shopping sessions in addition to antivirus. Its main reason to choose it is that breadth in the free edition; look elsewhere if you need broader operating-system support or automated remediation.

	CacheGuard-OS	Comodo Internet Security
Free plan	No	Yes
Free trial	No	No
Paid from	—	—
Open source	No	No
Platforms	Web, Linux	Windows
Free plan	Yes	Yes
Multi-vendor support	No	—
Deployment model	hybrid	—
Policy automation	Yes	—

CacheGuard-OS vs Comodo Internet Security

CacheGuard-OS

Comodo Internet Security