open source
40 open-source tools redefining how security teams secure the stack
Open source security software has become a key way for teams to get flexibility, transparency, and capability without licensing costs. The free tools in this roundup address …
UTMStack: Open-source unified threat management platform
UTMStack is an open-source unified threat management platform that brings SIEM and XDR features into one system. The project focuses on real time correlation of log data, …
The Bastion: Open-source access control for complex infrastructure
Operational teams know that access sprawl grows fast. Servers, virtual machines and network gear all need hands-on work and each new system adds more identities to manage. A …
Portmaster: Open-source application firewall
Portmaster is a free and open source application firewall built to monitor and control network activity on Windows and Linux. The project is developed in the EU and is …
Hottest cybersecurity open-source tools of the month: November 2025
This month’s roundup features exceptional open-source cybersecurity tools that are gaining attention for strengthening security across various environments. Heisenberg: …
DeepTeam: Open-source LLM red teaming framework
Security teams are pushing large language models into products faster than they can test them, which makes any new red teaming method worth paying attention to. DeepTeam is an …
cnspec: Open-source, cloud-native security and policy project
cnspec is an open source tool that helps when you are trying to keep a sprawling setup of clouds, containers, APIs and endpoints under control. It checks security and …
What happens when vulnerability scores fall apart?
Security leaders depend on vulnerability data to guide decisions, but the system supplying that data is struggling. An analysis from Sonatype shows that core vulnerability …
Metis: Open-source, AI-driven tool for deep security code review
Metis is an open source tool that uses AI to help engineers run deep security reviews on code. Arm’s product security team built Metis to spot subtle flaws that are often …
Strix: Open-source AI agents for penetration testing
Security teams know that application flaws tend to show up at the worst time. Strix presents itself as an open source way to catch them earlier by using autonomous agents that …
Sprout: Open-source bootloader built for speed and security
Sprout is an open-source bootloader that delivers sub-second boot times and uses a clean, data-driven configuration format that works across operating systems. “We built …
ProxyBridge: Open-source proxy routing for Windows applications
ProxyBridge is a lightweight, open-source tool that lets Windows users route network traffic from specific applications through SOCKS5 or HTTP proxies. It can redirect both …
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