Compare the Top Free Computer Security Software as of November 2025

What is Free Computer Security Software?

Computer security software helps protect devices, networks, and sensitive data from unauthorized access, cyberattacks, and other security threats. These tools provide a range of protective features such as antivirus, firewall, encryption, malware detection, and intrusion prevention systems. Computer security software is essential for safeguarding against viruses, ransomware, spyware, and phishing attacks, ensuring the integrity, confidentiality, and availability of data. Many security solutions also offer real-time monitoring, automated updates, and threat intelligence to detect and mitigate new vulnerabilities as they emerge. Businesses and individuals rely on computer security software to reduce risks, comply with regulations, and maintain a secure computing environment. Compare and read user reviews of the best Free Computer Security software currently available using the table below. This list is updated regularly.

  • 1
    ManageEngine Endpoint Central
    ManageEngine Endpoint Central is built to secure the digital workplace while also giving IT teams complete control over their enterprise endpoints. It delivers a security-first approach by combining advanced endpoint protection with comprehensive management, allowing IT teams to manage the entire endpoint lifecycle, all from a single console. With automated patching across Windows, Mac, Linux and 1,000+ third-party applications, it ensures vulnerabilities are mitigated before attackers can exploit them. Its next-gen antivirus (NGAV) feature, powered by AI-driven behavioural detection, provides 24/7 protection against ransomware, malware, and zero-day threats. Endpoint Central further strengthens enterprise defenses with a broad set of security capabilities, including vulnerability assessment and mitigation, peripheral device control, data loss prevention, application control, endpoint privilege management, encryption with FileVault and BitLocker, and browser security.
    Starting Price: $795.00/one-time
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  • 2
    Google Chrome Enterprise
    Chrome Enterprise is a suite of business offerings that includes Chrome browser, Chrome's cloud management tool Chrome Enterprise Core, and the advanced security capabilities in Chrome Enterprise Premium. Chrome offers a dedicated enterprise download bundle, giving admins access to additional resources and policy templates for managing Chrome across desktop environments in their organization. Chrome Enterprise Core provides admins with simple, centralized management from the cloud. It allows admins to manage their enterprise browser deployment across platforms all from the same place. Chrome Enterprise Premium enables secure access to applications and resources, and offers integrated threat and data protection in the browser. It adds an extra layer of security to safeguard your Chrome browser environment, including DLP, real-time URL and file scanning, and context aware access for SaaS and web apps.
    Starting Price: Free
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  • 3
    OneLogin

    OneLogin

    OneLogin

    Secure critical company information and empower employees with OneLogin, a trusted identity and access management (IAM) solution for the modern enterprise. Designed to strengthen enterprise security while simplifying business logins, OneLogin is an excellent solution for companies looking to enforce security policies with ease. OneLogin includes top-rated features such as single sign-on (SS), unified directory, user provisioning, adaptive authentication, mobile identitiy, compliance reporting, and more.
  • 4
    CySight

    CySight

    IdeaData

    CySight's Dropless Collection method provides absolute data retention, enabling the most data orientated decision making and cost-effective workflow for any organization, significantly enhancing network performance, network security and cyber intelligence to the highest level. With a Unique approach, CySight delivers comparative baselining, superior granularity, scalable collection, root cause analysis and QoS Analysis. All Designed to run independently or work together as a powerful single unit. CySight empowers communication and application visibility for networking, security, billing and compliance with high-end integrated network traffic analytics, granular forensics, cybersecurity intelligence, cloud usage, internet-of-things analytics, peering and billing to medium and large enterprise customers and service providers. Our objective at CySight is to reveal your data’s potential and eliminate all blind spots.
    Starting Price: $299/month
  • 5
    EventSentry

    EventSentry

    NETIKUS.NET ltd

    Hybrid SIEM solution combining real-time (event) log monitoring with comprehensive system health & network monitoring provides users with a complete picture of their servers and endpoints. The included security event log normalization & correlation engine with descriptive email alerts provides additional context and presents cryptic Windows security events in easy to understand reports that offer insight beyond what is available from raw events. EventSentry's NetFlow component visualizes network traffic, can detect malicious activity and offers insight into bandwith usage. Keeping track of Active Directory changes is easy with EventSentry's ADMonitor component that records all changes to AD & Group Policy objects and provides a complete user inventory to help identify obsolete accounts. Various integrations & multi-tenancy available.
    Starting Price: $85.00/one-time
  • 6
    Bacula Enterprise

    Bacula Enterprise

    Bacula Systems

    Bacula Enterprise delivers Physical, Virtual, Container and Hybrid Cloud Backup & Recovery software for the Modern Data Center - all from a single platform. Designed for medium and large organizations, Bacula Enterprise backup and recovery software brings unique innovation, modern architecture, business value benefits and low cost of ownership. Bacula Enterprise corporate data backup software solution uses exclusive technologies that increase the interoperability, power, flexibility and functionality of Bacula Enterprise into a wide range of IT environments such as enterprise data centers, managed service providers, software vendors or cloud providers. Thousands of organizations worldwide use Bacula Enterprise in mission-critical environments, including NASA, Texas A&M University, Unicredit, Swisscom, Sky, and many more. Bacula provides additional security features over other vendors and offers advanced, hybrid Cloud connectivity to Amazon, S3, Google, Oracle and many more.
  • 7
    Xeams

    Xeams

    Synametrics Technologies

    Xeams is, a secure and powerful complete mail server for Windows, Linux, Solaris, MacOSX and other flavors of UNIX. Xeams supports SMTP, POP3, and IMAP. It features a powerful spam filtering engine that eliminates up to 99% of junk email upon installation. The software offers a flexible approach to email, making it a very user-friendly server. Xeams can block 99% percent of all junk messages right out of the box. The filtering rules are fully customizable and get better as Xeams adapts to your email environment. IMAP and POP3 servers built right into the system to easily fetch emails from an email repository to a client's machine. Xeams can be used as an email firewall in front of another server, such as MS Exchange, or as a full email server requiring no other software to process emails. Use Xeams in front of your Office 365 infrastructure to gain additional filtering, reporting and archiving capabilities that you don't get with Office 365 alone.
    Starting Price: $20.00/year/user
  • 8
    Adaware Protect
    Adaware Protect is the all-in-one suite that includes Adaware Safe Browser to increase your online security. Adaware Protect's online security keeps your entire computer safe from suspicious websites. Adaware Protect blocks unsafe sites and lets you see what applications try to access malicious or unknown URLs. With one click, Adaware Protect allows you to block hackers and spyware from accessing your camera and microphone. When it's time to video conference, one quick click and you're ready to go. The Adaware Safe Browser gives you a faster more private way to navigate the web. Block ads for a faster browsing experience. Block cookies and trackers to keep from being tracked. Use our private search to keep your search history hidden. Choose your favorite features to optimize your PC’s performance. Scan and clean unnecessary files and applications on your PC from Adaware Protect. Keeping your computer safe has never been this easy!
    Starting Price: Free
  • 9
    ShieldApps Cyber Privacy Suite
    What you do online and on your computer should be your own business. Yet, in most cases, your personal information & web habits are being tracked constantly by 3rd parties who want to monetize your online behaviors or steal your identity. It takes powerful software to stave off malicious cyber attacks all day, every day. In our increasingly digital world, anyone is an easy target for a cyber attack. We put so much of our personal information online today, making it harder to guard against malicious hacking attempts. Our comprehensive software keeps you and your family safe at all times when using your devices or surfing the web. Cyber Privacy Suite fends off harmful privacy threats and proactively identifies where your information is vulnerable or exposed.
    Starting Price: $77.90 per 3 devices
  • 10
    Bitdefender Ultimate Small Business Security
    Bitdefender Small Business Security delivers enterprise-grade, layered cyber-protection designed specifically for small organizations. It covers Windows, macOS, iOS, and Android devices with centralized, easy-to-use management, so businesses without a dedicated IT staff can deploy and monitor security from one dashboard. Key features include multi-layered endpoint protection (machine learning, behavioral analytics, real-time monitoring, process termination, and rollback) to prevent known and unknown threats. It offers ransomware prevention and mitigation (detecting abnormal encryption attempts and restoring files from backups), fileless attack protection (memory/back-injection interference, script blocking), phishing & fraud prevention (blocking deceptive sites and warning users), and advanced exploit protection (real-time shield of browsers, Office apps, Adobe Reader) for comprehensive endpoint defense.
    Starting Price: $188.99 per month
  • 11
    indeni

    indeni

    indeni

    Indeni’s security infrastructure automation platform monitors firewall health and auto-detects issues like misconfigurations or expired licenses before they affect network operations. It automatically prioritizes issues so you only receive the most important alerts. Indeni protects your cloud environment by taking a snapshot of it before it’s built. Our cloud security analysis tool, Cloudrail, reviews your infrastructure-as-code files so you can identify violations earlier in development when they’re easier to fix. Constant detection of HA unreadiness from cross-device inconsistencies in security policies, forwarding tables, and other configurations and state. Consistent measurement of device configuration skew against locally-defined organizational standards. Collect relevant performance and configuration data from leading firewalls, load balancers, and other security infrastructure.
  • 12
    Votiro

    Votiro

    Votiro

    The only file security solution that ensures all files coming into your enterprise are completely safe. Unlike detection-based file security solutions that scan for suspicious elements and block files, Positive Selection singles out only the safe elements of each file, ensuring every file that enters your organization is 100% safe. Any file, anywhere, anytime. With a deep, expert understanding of all types of files, Votiro’s Secure File Gateway eliminates threats from the widest possible range of files, no matter how they enter your organization.
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