o365recon vs Legion: 2026 Comparison
o365recon is a free penetration testing tool. Legion is a free penetration testing tool. Compare features, ratings, integrations, and community reviews side by side to find the best penetration testing fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
Penetration testers and red teamers running Office 365 assessments need o365recon because it pulls user enumeration, tenant configuration, and permission mappings from Azure AD using valid credentials, giving you reconnaissance data in minutes instead of hours of manual API queries. The tool's 731 GitHub stars and active maintenance reflect real adoption in offensive security workflows. Skip this if you're looking for unauthenticated reconnaissance or cloud infrastructure scanning beyond Microsoft's identity stack; o365recon assumes you already have compromised or test credentials and focuses narrowly on what those credentials expose.
Penetration testers running internal security assessments on smaller networks will benefit from Legion's automated reconnaissance pipeline, which compresses hours of manual scanning into minutes without licensing friction. The 1,052 GitHub stars and active open source community signal production-grade stability for teams already comfortable maintaining their own tools. Skip Legion if your organization needs commercial support, reporting that maps to compliance frameworks, or scanning at scale across hundreds of hosts; you'll spend more time patching gaps than testing.
