Open source focus

Open Source Alternatives to Build38

7 open source Cybersecurity options similar to Build38, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.

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Backslash Security
Not rated
Agentic endpoint security for AI coding, providing visibility, governance, and real-time protection.
Open source
OWASP
Not rated
A global non-profit foundation dedicated to improving software security through open community collaboration.
Open source · Self-hostable
Snyk
Not rated
Snyk is a developer security platform that helps software teams find and fix vulnerabilities in code, open source dependencies, containers, and cloud infrastructure.
Open source · Self-hostable
ARMO
Not rated
ARMO provides an open-source Kubernetes security platform, Kubescape, for end-to-end security from development to production.
Open source · Self-hostable
Puck
Not rated
Open-source, AI-driven endpoint investigation tool for security teams.
Open source · Self-hostable
Falco
Not rated
Open-source, cloud-native runtime security tool for detecting anomalous application behavior across hosts, containers, and Kubernetes.
Open source · Self-hostable
GrapheneOS
Not rated
A privacy and security-focused mobile operating system based on Android.
Open source · Self-hostable

Company	License	Founded	Rating	Reviews
Backslash SecurityAgentic endpoint security for AI coding, providing visibility, governance, and real-time protection.	Open source	-	Not rated	-
OWASPA global non-profit foundation dedicated to improving software security through open community collaboration.	Open source · Self-hostable	-	Not rated	-
SnykSnyk is a developer security platform that helps software teams find and fix vulnerabilities in code, open source dependencies, containers, and cloud infrastructure.	Open source · Self-hostable	-	Not rated	-
ARMOARMO provides an open-source Kubernetes security platform, Kubescape, for end-to-end security from development to production.	Open source · Self-hostable	-	Not rated	-
PuckOpen-source, AI-driven endpoint investigation tool for security teams.	Open source · Self-hostable	-	Not rated	-
FalcoOpen-source, cloud-native runtime security tool for detecting anomalous application behavior across hosts, containers, and Kubernetes.	Open source · Self-hostable	-	Not rated	-
GrapheneOSA privacy and security-focused mobile operating system based on Android.	Open source · Self-hostable	-	Not rated	-