Comodo Antivirus Review: Default-Deny for Active Threats

An Overview of Comodo

Comodo Security Solutions, Inc., now named Xcitium, is a cybersecurity company established in 1998, founded in the United Kingdom, and based in Bloomfield, New Jersey. Although the company rebranded in 2022, the Comodo brand remains active, especially regarding consumer products.

Today, the Comodo website offers antivirus and device security tools for individuals. At the same time, the Xcitium platform focuses on business-oriented solutions, such as Zero Trust architecture and enterprise threat protection. Xcitium’s technologies power many tools that are available on the Comodo website. It’s also worth noting that a separate branch of the original Comodo organization, Comodo CA Limited, was acquired and renamed Sectigo in 2017. They now operate independently as a digital certificate authority.

Comodo offers various security tools to protect individuals' devices and websites. These include antivirus software, a full internet security suite, file containment technology, a personal firewall, website protection services, malware scanning and removal, secure DNS, content delivery optimization, a web application firewall, and data backup tools.

Comodo Antivirus is at the core of their consumer lineup and is offered in free and paid versions. It provides layered protection through real-time scanning, containment, and other integrated security tools.

Comodo’s antivirus is also part of their broader Internet Security suite, which AV-Test has independently evaluated. The suite earned 6 out of 6 in protection, 5.5 out of 6 in performance, and 5.5 out of 6 in usability, suggesting it delivers solid, well-rounded protection. Although the standalone antivirus hasn’t been tested separately, these results offer a meaningful picture of its capabilities.

The company maintains a profile with the Better Business Bureau (BBB) under the name "Comodo Group," though they are not accredited. Still, with more than two decades in cybersecurity, a global presence, and a focus on proactive protection, they remain a relevant and recognizable player in consumer and small-business digital security.

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What Services & Features Do They Offer?

Comodo offers both a free and a premium version of their antivirus software. While the free plan includes core protections, the premium tier expands into more advanced territory. Below is a comprehensive breakdown of the key features and tools found in Comodo Antivirus and their Internet Security suite.

• Real-time malware protection: Their antivirus monitors files, programs, and system processes in real time. As soon as a file is opened, downloaded, or executed, Comodo checks it for signs of malware. If a known threat is detected, such as a virus, Trojan, worms, or ransomware, the software blocks it before it can run and corrupt important files
• Default deny protection: This is Comodo’s core security approach. Instead of allowing files to run unless flagged as dangerous, the software automatically blocks anything that hasn’t been confirmed safe. Only verified, trusted files are allowed to operate, which reduces the risk of infection from unknown or disguised threats
• Auto containment: When a file’s safety is unclear, Comodo runs it in a virtual file system isolated from everything else. The file can be tested or used without access to critical files or settings in this sandbox. This protects the device even if the file turns out to be malicious
• Host Intrusion Prevention System (HIPS): HIPS monitors critical system areas, like system files, registry keys, and active processes, and looks for suspicious or unauthorized behavior. If an unknown application tries to make changes that could be harmful, Comodo blocks the action and notifies the user
• VirusScope behavior analysis: VirusScope analyzes how individual programs behave once running. It watches for actions commonly linked to malware, such as modifying system files or replicating processes. If dangerous behavior is detected, the system can stop the process and reverse changes, offering extra protection from any emerging threats
• Cloud-based antivirus scanning: Files that can’t be classified on the local device are uploaded to Comodo’s Valkyrie system for in-depth behavioral analysis. This cloud-based service examines how a file acts and determines if it shows malware traits, even if it hasn’t been officially added to threat lists. This is especially helpful for detecting trickier viruses that evolve rapidly
• Cloud-based behavior analysis: Files that can’t be classified on the local device are uploaded to Comodo’s Valkyrie system for in-depth behavioral analysis. This cloud-based service examines how a file acts and determines if it shows malware traits, even if it hasn’t been officially added to threat lists
• Firewall: Comodo’s firewall manages all network traffic coming in and going out. It blocks unauthorized access and prevents suspicious applications from connecting to the internet. By default, it runs in safe mode, automatically allowing trusted apps and creating rules for them if enabled, making setup easier. You can also create custom rules to allow or block specific programs
• Secure shopping: This feature creates a secure desktop session for online activities involving sensitive information, like banking or shopping. It isolates the browser from the main system and blocks keylogging, screen capture, or other techniques used to steal data during transactions. This allows for a secure user experience during online transactions
• Web filtering and anti-phishing: The software scans websites in real time to prevent users from accessing known phishing pages or malicious URLs. It blocks connections to sites associated with malware downloads, scams, and identity theft, helping protect personal information and system integrity
• Spyware and adware scanning: The software detects and removes programs designed to secretly monitor user behavior or serve unwanted advertisements. These may include keyloggers, tracking cookies, or installed toolbars without clear consent
• Quarantine system: Any files flagged as threats are moved into quarantine, where they can no longer run or affect the system. Users can review quarantined items and choose to delete them permanently or restore them if they believe the detection was a false positive
• Game mode: When this mode is active, Comodo suppresses pop-ups, notifications, and scheduled tasks so that games or full-screen applications run without interruptions. Core protections remain active, including containment and real-time monitoring
• Automatic updates: The software automatically updates virus definitions, cloud lookups, and protection engines in the background. This ensures that Comodo stays prepared to detect and block the latest threats without requiring the user to manage updates manually
• Customizable scanning options: Users can start a virus scan with a single click, choosing between quick, full, or custom options. They also offer the ability to schedule scans to run automatically at set times, helping ensure regular system checks without manual input

Plans & Prices

Comodo offers two main options for individual users: a free antivirus version and a paid Internet Security suite. Both include their antivirus software and are available directly through their website.

Comodo’s free antivirus provides access to their core security engine without requiring a subscription. This version includes essential protections such as Defense+ Technology, Auto Sandbox Technology™, spyware scanning, and cloud-based antivirus scanning. Together, these features form a prevention-first approach, where threats are identified and isolated before they can cause harm.

The free version offers essential antivirus protection but excludes the more advanced tools in the full security suite. It’s a lightweight, but comprehensive option suited for users who need basic coverage without extra features.

Internet security suite

The paid version of Comodo’s antivirus software is the same product as their Internet Security suite. Whether you select the paid option under their antivirus product or go directly to the Internet Security section, both redirect to the same purchase page. This means users aren’t upgrading to a premium antivirus alone, but are instead buying the full Internet Security suite. This suite includes all the protections of the free version, along with additional features like a firewall, secure shopping mode, and web filtering.

In addition to its technical features, the Comodo Internet Security suite includes unlimited access to their GeekBuddy support team, which can assist with virus removal, setup, and other security concerns. The suite also has a virus-free guarantee, offering up to $500 in repair coverage if Comodo’s software cannot remove an infection.

The Internet Security suite costs $29.99 per year for one PC or $39.99 per year for three PCs. These fixed plans do not offer customization options or advanced tiers to individual users.

Comodo mobile security

Comodo also offers a mobile-focused product called Comodo Mobile Security (CMS), which is available for Android and iOS devices. Although it’s not a full antivirus in the traditional sense, CMS focuses on privacy, safe browsing, and device-level protection tailored to mobile users.

The Android version includes antivirus scanning, safe browsing, ID protection, and a secure VPN with unlimited traffic for premium users. It also offers app locking, a firewall for managing app-level network access, Wi-Fi security alerts, and a secure vault for storing sensitive data protected by biometrics or a pattern lock. The iOS version includes safe browsing, dark web ID protection, VPN access, and the secure vault feature. Due to platform restrictions, antivirus and firewall features are unavailable, but the focus remains on maintaining privacy and secure connections.

CMS is available in free and paid plans. The free version covers safe browsing, antivirus (on Android), and ID protection for one email address. The premium plan, priced at $3.99 per month or $12.99 per year, expands ID protection to up to 20 email addresses and credit cards, enables unlimited VPN usage, and unlocks the full set of mobile tools across supported platforms.

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The Benefits of Comodo

Freemium offerings

Comodo provides a free and paid version of their antivirus software, making it accessible to users with different needs and budgets. This allows individuals to try out the software without upfront cost while still receiving meaningful protection, and upgrade later if they see fit.

Automatic file isolation

One of Comodo’s standout features is their automatic containment of unknown files. Instead of allowing unverified files to run freely, the software isolates them in a secure environment, minimizing the chance of infection from ransomware, zero-day threats, or unfamiliar downloads.

Easy to install

The installation process is simple and streamlined for both versions of the software. For the free antivirus, users only need to click a single button to download and install the program. For the paid version, entering basic purchase information is all that is required; after that, the software installs automatically with minimal setup.

Competitive pricing for a full security suite

Comodo’s Internet Security suite includes a firewall, secure shopping mode, web filtering, and more, yet it’s priced significantly lower than many competitors. At $29.99 per year for one device and $39.99 for three, the suite offers an affordable option for layered protection.

Security for online purchases

The suite’s Secure Shopping mode isolates and protects banking and online purchases. This feature is especially relevant for users concerned about keyloggers, phishing, or spyware during financial transactions.

Configurable solutions

Comodo allows users to adjust settings and rules according to their preferences. While the default settings are ready, more advanced users can configure elements like firewall behavior, scan preferences, and application controls for a more personalized experience.

Generous free version with meaningful features

Comodo’s free offering includes many core protection features, unlike many free antivirus tools that are little more than promotional versions. Their free features provide actual defense rather than just limited diagnostics or system cleanup.

The Drawbacks of the Software

Complex websites

Comodo maintains multiple websites for their products, often presenting different or inconsistent information. The antivirus and Internet Security suite are frequently described with overlapping or contradictory details, making it difficult to understand exactly what features are included in each version. This can confuse users trying to evaluate this antivirus provider.

Inconsistent platform support across plans

Comodo’s free antivirus is available for Windows, Mac, and Linux, but their full Internet Security suite is only compatible with Windows (specifically Windows 10, 8, and 7). This inconsistency in platform support limits options for users who rely on multiple operating systems, want to use the same provider across devices, and are willing to pay the subscription prices.

Lacks additional security features

Unlike competitors, Comodo doesn’t include features like a password manager, parental controls, anti-theft tools, or system performance optimizers. While not critical to core protection, the absence of these tools means users looking for an all-in-one solution may need to use other software to fill the gaps.

Technical expertise required

Although the software offers a variety of customization options, navigating and configuring them can be intimidating for users without a technical background. Some customers have reported that the dashboard and settings menu feel overwhelming, even when trying to make basic changes.

The User Experience

Customer opinions about Comodo are notably mixed across platforms, reflecting a wide spectrum of experiences with both the desktop and mobile products. Comodo Group has a profile on BBB and holds a B-rating, though they are not accredited.

On Trustpilot, Comodo holds a low rating of 1.7 out of 5, while on Sitejabber, the company fares much better at 4.5 out of 5. On G2, Comodo earns a 4.1 out of 5. The mobile app is also generally well-received on Google Play, with a 4.4 out of 5, though iOS users are less enthusiastic, giving it a 3.1 out of 5 on the App Store.

Positive feedback

Many users commend Comodo for delivering robust security features, especially in their free version. Real-time protection, sandboxing, and firewall controls were frequently highlighted, with containment technology standing out for allowing users to open suspicious files safely. Reviewers also appreciated that the software ran quietly in the background without slowing down their systems, even during full scans.

Ease of setup and a user-friendly interface were additional points of praise. Users found installation quick and navigation simple, with options for basic use and advanced customization. Mobile feedback was also largely positive—Android users praised the app’s feature-rich design and minimal ads, while iOS users appreciated its simplicity, though noted fewer features by comparison.

Critical feedback

Despite the positive feedback, users also voiced frustrations, particularly around usability and support. Some found the dashboard difficult to navigate and felt the firewall and containment settings required more technical knowledge than expected. Other customers said the containment system was overly aggressive, often isolating safe files without a clear explanation, leading to frequent false positives. Many also voiced concerns over the company's customer support, claiming slow or absent responses, unresolved billing issues, broken download links, and challenges with canceling services.

On the BBB site, Comodo currently has two listed complaints—neither of which has been addressed by the company. One complaint details a billing system error that caused unauthorized charges on a customer’s credit card; the customer did not receive a refund despite internal staff confirming the charge was a mistake. The other complaint also concerns a billing issue, but is related to another Comodo product.

Customer Service & Support Options

Comodo offers several customer support options for users seeking assistance with installation, troubleshooting, or general product use. Support is available by phone at +1 (888) 551-1531 or +1 (973) 859-4000, and users can also reach their sales team by emailing support@comodo.com.

They also provide a dedicated address at security@comodo.com for reporting security-related issues or vulnerabilities.

Through their website, you can also submit a form to contact their sales team and a form for emergency incidents. In addition to direct support, they offer a range of self-service tools. These include online help guides, a community forum for user discussions and troubleshooting, and an official blog that shares product updates and cybersecurity tips. These resources allow you to learn about and manage their software independently while addressing common technical product questions.

Final Thoughts

Comodo takes a prevention-first approach to cybersecurity, offering antivirus and Internet Security solutions, prioritizing early threat detection and containment. Their default-deny model, auto-sandboxing, and real-time behavior analysis are designed to keep unknown threats from slipping through the cracks. The free version includes comprehensive features, while the paid Internet Security suite adds deeper protection, secure browsing tools, and support services that enhance the overall experience.

At the same time, the service comes with its trade-offs, from occasional usability challenges to differences in platform compatibility. For users who value a prevention-based approach and don’t mind a slightly steeper learning curve, Comodo may be a suitable option, particularly for those drawn to their free version or competitive pricing on paid plans.

If you're still considering your options, we encourage you to explore our other reviews and compare providers to find the best antivirus software for your needs. You can also browse our blog for deeper context on cybersecurity trends and tips to stay protected online.

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