Arachni vs Start Left® Security DAST: side-by-side comparison (2026)

Arachni: An open-source web application security scanner framework that identifies vulnerabilities in web applications.

Start Left® Security DAST: DAST tool that tests running apps for runtime vulnerabilities via attack simulation. Built by Start Left® Security.

The table above shows where their features, integrations, deployment and company size fit differ.

Often, yes. Arachni and Start Left® Security DAST are both Dynamic Application Security Testing products, and both cover App Security. Key differences: Arachni is Free while Start Left® Security DAST is Commercial. Use the table above to see where features, deployment and company size fit differ.