The State of Web Vitals

CMS

The CMS the site is built on, as a per-site dimension.

Field data PhoneDesktopAll Scope All sites Q1 2026 edition · Desktop field outcomes
Metric LCP INP CLS
1

At a glance the headline numbers for CMS

The CMS the site is built on, as a per-site dimension.

12
Categories
42,025 sites
73.3%
Top share
wordpress
0.03
Top CLS
Median for wordpress

WordPress powers 73.3% of the sites we measured.

The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
2

CMS who uses what, and how stable each group is

Median CLS
0
0.05
0.10
0.15
0.20
0.25
wix0.016% of sites
typo30.010% of sites
shopify0.0210% of sites
joomla0.023% of sites
wordpress0.0373% of sites
drupal0.034% of sites
squarespace0.042% of sites
ghost0.050% of sites
adobe_commerce0.071% of sites
VariantShare of sitesMedian
wix 2,687 sites
6%
0.01
typo3 48 sites
0%
0.01
shopify 4,046 sites
10%
0.02
joomla 1,222 sites
3%
0.02
wordpress 30,809 sites
73%
0.03
drupal 1,608 sites
4%
0.03
squarespace 1,010 sites
2%
0.04
ghost 19 sites
0%
0.05
adobe_commerce 565 sites
1%
0.07

Wix sites post the best median CLS (0.01). Adobe_commerce sites trail at 0.07. Correlation, not causation. computed

The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
3

Passing CLS per CMS which group passes the CLS most often

VariantSitesPassing CLSCLS
Wix 6.4% 2,687 96% 0.01
Shopify 9.6% 4,046 86% 0.02
Joomla 2.9% 1,222 85% 0.02
Squarespace 2.4% 1,010 79% 0.04
Drupal 3.8% 1,608 79% 0.03
Wordpress 73.3% 30,809 78% 0.03
Typo3 0.1% 48 73% 0.01
Adobe commerce 1.3% 565 66% 0.07
Ghost 0% 19 64% 0.05
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good CLS (0.1 at p75) · one value per site

96% of Wix sites pass CLS. Adobe commerce trails 30 points behind, leaving 34% of its sites failing. computed

The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
4

Why this matters for the Core Web Vitals, and where to start fixing it

The CMS decides your defaults: the theme's markup, the plugin economy, how images are sized, what loads in the head. Most sites never change those defaults, so the platform's choices become the platform's vitals.

No platform is doomed and none is safe. The spread inside a platform is bigger than the gap between platforms: a tuned site on a slow-median CMS beats a neglected site on a fast one. The platform pages rank them on real field data.

How does this affect the Core Web Vitals?

CMS correlates with the CLS. With Wix, 96% of sites pass the CLS. With Adobe commerce, 66% do. The causal link is weak: the choice mostly marks what kind of site made it.

Go fix it CMS standings → WordPress Core Web Vitals guide → Shopify Core Web Vitals guide →
Related signals Analytics on page → Optimization plugins → Cookie wall detected → JS framework → Chrome field data from 94,910 sites, representing millions of real page loads · How we measured