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Conjur
Conjur: Open-source secrets management and application identity

Conjur is an open-source secrets management project designed for environments built around containers, automation, and dynamic infrastructure. It focuses on controlling access …

Anubis
Anubis: Open-source web AI firewall to protect from scraper bots

Anubis is an open-source tool designed to protect websites from automated scraping and abusive traffic by adding computational friction before a request is served. Maintained …

Zabbix
Zabbix: Open-source IT and OT observability solution

Zabbix is an open source monitoring platform designed to track the availability, performance, and integrity of IT environments. It monitors networks along with servers, …

Prometheus
Prometheus: Open-source metrics and monitoring systems and services

Prometheus is an open-source monitoring and alerting system built for environments where services change often and failures can spread fast. For security teams and DevOps …

open-source security tools
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
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, …

Bastion
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
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 …

open-source cybersecurity tools
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
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 …

Tor
Tor Project is rolling out Counter Galois Onion encryption

People who rely on Tor expect their traffic to move through the network without giving away who they are. That trust depends on the strength of the encryption that protects …

cnspec
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 …

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