9 Open source cloud security tools for 2025

Open source cloud security tools are crucial for organizations striving to maintain security in dynamic, multi-cloud environments by providing transparency, collaboration, and community-driven innovation. These tools, ranging from cloud security posture management to continuous compliance, offer essential solutions for protecting cloud-native infrastructures against evolving threats. Key tools include Open Policy Agent for policy enforcement, Falco for runtime protection, Checkov for infrastructure as code security, Keycloak for identity management, HashiCorp Vault for secrets management, Wazuh for SIEM and log management, Zeek for network visibility, Cloud Security Suite for penetration testing, and OpenSCAP for compliance automation. While open source tools offer cost-effective and flexible security solutions, they require ongoing maintenance and updates, prompting some organizations to consider vendor-managed platforms like Sysdig Secure for a more streamlined approach to cloud security management.