OneFuzz is a cross-platform free and open source fuzz testing framework by Microsoft.

[2] OneFuzz is a self-hosted fuzzing-as-a-service platform that automates the detection of software bugs that could be security issues.

[2] Notable features include composable fuzzing workflows, built-in ensemble fuzzing, programmatic triage and result de-duplication, crash reporting notification callbacks, and on-demand live-debugging of found crashes.

[4] Microsoft uses the OneFuzz testing framework to probe Edge, Windows and other products at the company.

[1] It replaced the previous Microsoft Security Risk Detection software testing mechanism.