Gitrob is described as 'tool to help find potentially sensitive files pushed to public repositories on Github' and is an app in the Development category. There are eight alternatives to Gitrob for Mac, Windows, Linux, Self-Hosted solutions and SaaS. The best alternative is Gitleaks, which is both free and Open Source. Other great apps like Gitrob are GitGuardian (Free Personal), truffleHog (Free, Open Source), Repo-supervisor (Free, Open Source) and repo-security-scanner (Free, Open Source).
GitGuardian is a cybersecurity startup solving the issue of secrets sprawling through source code, a widespread problem that leads to some credentials ending up in compromised places or even in the public space.
It happens sometimes that you can commit secrets or passwords to your repository by accident. The recommended best practice is not commit the secrets, that's obvious. But not always that obvious when you have a big merge waiting to be reviewed.