ClusterFuzz vs Virgil Security: What are the differences?

What is ClusterFuzz? Scalable fuzzing infrastructure which finds security and stability issues in software, used by Google Chrome. ClusterFuzz is a scalable fuzzing infrastructure which finds security and stability issues in software. It is used by Google for fuzzing the Chrome Browser, and serves as the fuzzing backend for OSS-Fuzz.

What is Virgil Security? We make every developer into an applied cryptologist. Virgil consists of an open-source encryption library, which implements CMS and ECIES(including RSA schema), a Key Management API, and a cloud-based Key Management Service.

ClusterFuzz and Virgil Security can be primarily classified as "Security" tools.

ClusterFuzz and Virgil Security are both open source tools. It seems that ClusterFuzz with 3.78K GitHub stars and 294 forks on GitHub has more adoption than Virgil Security with 139 GitHub stars and 12 GitHub forks.