github.comvsshadowserver.org

Github edges out Shadowserver significantly on homepage messaging, 83 to 34. Here's where the gap comes from.

Github is clearer about what it does (100 vs 60 on clarity). Github has stronger CTAs (60 vs 42). Github has a much stronger pricing page (90 vs 0). Shadowserver doesn't have a detectable pricing page at all.

Github uses a "Community / Movement" positioning while Shadowserver goes with "Trust / Authority" — fundamentally different approaches to winning the same buyer.