June 2025 platform CWV pass rates (SEJ): Duda 83.63%, Shopify 75.22%, Wix 70.76%, Squarespace 67.66%, Drupal 59.07%, WordPress 43.44%
Claim: Per the June 2025 CWV Technology Report (summarised by Search Engine Journal, Roger Montti, August 2025):
| Platform | CWV "Good" (all 3) | INP "Good" | Notes |
|---|---|---|---|
| Duda | 83.63% | ~93% (rank #2) | Native asset pipeline; bfcache support |
| Shopify | 75.22% | ~89% (rank #3) | Controlled hosting + Cloudflare CDN |
| Wix | 70.76% | 86.82% | Heavy default JS (~1 MB) but optimised loading |
| Squarespace | 67.66% | 95.85% (rank #1) | Strong on INP, weaker on LCP |
| Drupal | 59.07% | 85.5% (lowest INP) | Bias of Drupal sites toward better hosting |
| WordPress | 43.44% | 85.89% | Plugin/theme ecosystem entropy |
Source: Search Engine Journal, "2025 Core Web Vitals Challenge: WordPress Versus Everyone" — Roger Montti, August 2025.
Confidence: Verified.
The platform spread IS the moat. Duda, Shopify, Squarespace, and Wix all outperform WordPress on CWV because they control hosting, theme architecture, and the asset pipeline. WordPress's 43.44% pass rate is structural, not coincidental — an open ecosystem of low-quality themes, page builders, and plugins compounds page weight. The agency that delivers durable CWV on WordPress (or migrates clients to Astro/Next.js/Hugo) is doing work freelancers cannot replicate. Supersedes the older 44% figure from brief 2 ([[wordpress-cwv-44pct-mobile-2025]]) with more precise per-platform numbers.
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- reference Platform mobile CWV pass rates, November 2025 CrUX Tech Report (SEJ analysis, Dec 2025) supersedes