How is Sqreen different from SAST or DAST tools?

Static Application Security Testing and Dynamic Application Security Testing tools, focus on possible vulnerabilities instead of focusing on vulnerabilities that are actually triggered by attackers. They give you a list of vulnerabilities that you have to fix, often with a lot of false-positives. Sqreen protects your application at runtime, it will give you a list of vulnerabilities triggered while also protecting your application from attacks.

You can read more about SAST vs. DAST vs. Sqreen here