g0
g0 is an open-source security control layer for AI agent systems, built by Guard0.
About
g0 is an open-source security control layer for AI agent systems, built by Guard0. It tackles three questions that most agent operators can't currently answer well: what agents do you have, what can they access, and can you demonstrate they're under control. The tool runs 1,200+ security rules across 12 domains mapped to OWASP, NIST, ISO, and EU AI Act frameworks, generates AI Bills of Materials in CycloneDX format, runs adversarial tests using 4,000+ attack payloads with CVSS scoring, and monitors agent fleets as a background daemon for security drift. It integrates into CI/CD pipelines via SARIF output for GitHub Code Scanning and supports 10 frameworks including LangChain, CrewAI, OpenAI Agents, and OpenClaw. Licensed under AGPL 3.0 with optional Guard0 Cloud for visualization.
Engineering teams deploying AI agents in regulated industries or any context where security governance and auditability matter. Also valuable for any team that wants to understand its agent attack surface before it becomes a production incident.
Pros & Cons
Pros
- check The combination of static assessment, adversarial testing, and continuous fleet monitoring covers the full security lifecycle rather than just point-in-time checks
- check Compliance mapping to EU AI Act, OWASP, NIST, and ISO standards makes it a practical tool for teams with regulatory obligations, not just security hobbyists
- check CI/CD integration with SARIF output means security gates can be enforced automatically before agents reach production
Cons
- close AGPL 3.0 licensing has copyleft implications that some commercial teams will need to evaluate carefully before adopting
- close The depth of coverage (1,200+ rules, 4,000+ payloads) means initial triage of findings can be time-consuming for teams new to AI security
- close Full visualization and triage capabilities depend on the paid Guard0 Cloud service — the open-source tool alone has a less polished results experience
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