Compare the Top Free Computer Security Software as of June 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
    ActivTrak

    ActivTrak

    Birch Grove Software

    ActivTrak’s workforce intelligence platform transforms work activity data into actionable insights to optimize performance management and boost business productivity. Unlike traditional employee monitoring tools, ActivTrak is the only complete solution with employee monitoring, productivity and performance management, and workforce planning capabilities that deliver measurable ROI in just weeks. Key differentiators include: - Enterprise-class scale to accelerate time-to-value - Employee-centric approach to ensure data privacy - AI-powered insights to help prioritize actions - Best-in-class expertise to optimize outcomes
    Starting Price: $10/user/month billed annually
  • 2
    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
  • 3
    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
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