Open source prompt-injection projects
Every project in the registry tagged prompt-injection, ranked by real GitHub adoption.
Security scanner for AI agent skills. Detect vulnerabilities, malicious patterns, security risks, prompt injection, data exfiltration, and supply-chain risks in
ADR secures enterprise AI agents through observability, security benchmarking, and threat detection. Deployed at Uber.
The independent security agent for AI-written software. Finds issues, investigates whether they are real, and shows you the evidence. Deterministic core, no API
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Frequently asked questions
How many open source prompt-injection projects are there?
This registry tracks 3 projects tagged prompt-injection, with 20,038 GitHub stars between them. The most-adopted is SkillSpector at 17,624 stars.
Are these prompt-injection projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which prompt-injection project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these prompt-injection projects still maintained?
3 of the 3 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.