adoptium.netvsgithub.com

Github edges out Adoptium modestly on homepage messaging, 83 to 72. Here's where the gap comes from.

Github is clearer about what it does (100 vs 44 on clarity). Github's hero ("Search code, repositories, users, issues, pull requests...") names something concrete, while Adoptium's ("The Power of Eclipse Temurin®.") stays abstract. Github has stronger CTAs (60 vs 42). Github has a much stronger pricing page (90 vs 0). Adoptium doesn't have a detectable pricing page at all.

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