WordPress

The dominant open-source CMS, historically powering a plurality of the web (~43% at its late-2025 peak). The request-time, database-backed publishing model that the static-site-generator / jamstack approach is positioned against.

Status (per our source)

• Share fell 43.20% → 41.90% over six months to May 2026 — see wordpress-market-share-decline, the first sustained slide in years.
• Pressures cited: governance drama (Mullenweg vs. WP Engine), security concerns, weaker core-web-vitals (48% pass rate vs. astro‘s 66%), usability friction.
• Independently, core-web-vitals-wordpress-astro ranks WordPress last of 7 platforms on CWV field data (49%), behind every site builder and CMS measured — reinforcing the performance angle of the decline.
• Gaining at its expense: Wix, Shopify, Squarespace, and static generators like astro (downloads ~doubled in early 2026).

Note

WordPress can be used in a static/headless setup (as a content source for an SSG like astro), so the contest is the rendering model (request-time vs. build-time), not WordPress-as-content per se.