Open source fuzzing projects
Every project in the registry tagged fuzzing, ranked by real GitHub adoption.
the champagne of beta embedded databases
Catch API bugs before your users do
A powerful tool for automated LLM fuzzing. It is designed to help developers and security researchers identify and mitigate potential jailbreaks in their LLM AP
Frequently asked questions
How many open source fuzzing projects are there?
This registry tracks 3 projects tagged fuzzing, with 14,273 GitHub stars between them. The most-adopted is sled at 9,091 stars.
Are these fuzzing 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 fuzzing 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 fuzzing projects still maintained?
1 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.