I Scanned 5 Popular JavaScript Sites for SEO...

Everyone assumes big tech companies have flawless SEO. I decided to test that. I scanned five well-known JavaScript-heavy sites — react.dev, vercel.com, stripe.com/docs, linear.app, and shopify.com — running 19 SEO health checks across 10 pages each. Every single site had issues. Some had a lot of them. The Scores react.dev — 74/100 (Best of the group) vercel.com — 71/100 (Solid but sloppy on details) stripe.com/docs — 60/100 (Surprising for Stripe) linear.app — 57/100 (Heavy SPA showing its sea