Basilisk review
Broad self-hosted AI security testing with evolutionary adversarial search and CI/CD support.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Basilisk is an open-source AI red teaming and LLM security testing framework for security researchers, penetration testers, and defensive teams. It runs on Windows, macOS, and Linux, and supports hosted and local language models through integrations including OpenAI, Anthropic, Google Gemini, Azure, AWS Bedrock, Ollama, vLLM, and llama.cpp. Its self-hosted model suits teams that want local control over testing workflows and evidence.
Its standout capability is evolutionary adversarial prompt search, which automates the discovery of challenging prompts instead of limiting assessments to fixed examples. The testing scope includes OWASP-aligned attack modules, prompt injection, jailbreaks, data exfiltration, RAG attacks, unsafe outputs, and guardrail posture. Differential scanning can compare multiple models, while deterministic evaluation suites with assertions support repeatable checks and custom test cases. These capabilities make Basilisk a fit for teams building structured security evaluations across changing models and deployments.
Basilisk also fits development and audit workflows through GitHub Actions CI/CD integration, signed audit logging, evidence-backed findings, and exports in HTML, JSON, SARIF, Markdown, and PDF. The breadth is useful for open-source teams that need one framework spanning local runtimes, model APIs, attack testing, reporting, and regression checks. However, self-hosting shifts environment management and operational responsibility to the adopting team, and the AGPL-3.0 license may not suit every commercial distribution model. Choose Basilisk for broad, locally controlled testing; consider a different tool if you need a managed service or a narrower workflow with less operational ownership.
Basilisk pros and cons
- Where it wins
- Evolutionary prompt search covers injection, jailbreak, RAG, and leakage attacks
- Works across Windows, macOS, Linux, hosted models, and local runtimes
- Exports HTML, JSON, SARIF, Markdown, and PDF reports for security workflows
- Where it doesn't
- Self-hosted deployment requires teams to manage the operating environment
- AGPL-3.0 licensing may require review before commercial adoption
- Its broad module set may require security expertise to configure and interpret
Basilisk fact sheet, pricing and score →
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