Alt Security Autonomous Pentesting Platform vs Legion: Side-by-Side Comparison (2026)

Alt Security Autonomous Pentesting Platform: AI-autonomous pentesting platform for continuous web, API & AI app testing. built by Alt Security. Core capabilities include Autonomous AI-driven penetration testing agent, Continuous and automated attack surface testing, Blackbox, greybox, and whitebox test modes..

Legion: An open source network penetration testing framework with automatic recon and scanning capabilities..

Both serve the Penetration Testing market but differ in approach, feature depth, and target audience.

Alt Security Autonomous Pentesting Platform is developed by Alt Security. Legion is open-source with 1,052 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Alt Security Autonomous Pentesting Platform and Legion serve similar Penetration Testing use cases: both are Penetration Testing tools, both cover Reconnaissance. Key differences: Alt Security Autonomous Pentesting Platform is Commercial while Legion is Free, Legion is open-source. Review the feature comparison above to determine which fits your requirements.