The State of Web Vitals

CMS

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

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · Phone 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
80,280 sites
73.5%
Top share
wordpress
0.00
Top CLS
Median for wordpress

WordPress powers 73.5% of the sites we measured.

The State of Web Vitals · Q2 2026 · 189,915 sites · phone 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
wordpress0.0074% of sites
shopify0.0010% of sites
wix0.007% of sites
drupal0.004% of sites
joomla0.003% of sites
typo30.000% of sites
ghost0.000% of sites
squarespace0.013% of sites
adobe_commerce0.021% of sites
storyblok0.070% of sites
VariantShare of sitesMedian
wordpress 58,969 sites
74%
0.00
shopify 7,614 sites
10%
0.00
wix 5,211 sites
7%
0.00
drupal 2,984 sites
4%
0.00
joomla 2,325 sites
3%
0.00
typo3 95 sites
0%
0.00
ghost 37 sites
0%
0.00
squarespace 2,027 sites
3%
0.01
adobe_commerce 987 sites
1%
0.02
storyblok 11 sites
0%
0.07

Wordpress sites post the best median CLS (0.00). Storyblok sites trail at 0.07. Correlation, not causation. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
3

Passing CLS per CMS which group passes the CLS most often

VariantSitesPassing CLSCLS
Wix 6.5% 5,211 97% 0.00
Typo3 0.1% 95 96% 0.00
Shopify 9.5% 7,614 94% 0.00
Joomla 2.9% 2,325 93% 0.00
Squarespace 2.5% 2,027 91% 0.01
Drupal 3.7% 2,984 91% 0.00
Ghost 0% 37 91% 0.00
Wordpress 73.5% 58,969 90% 0.00
Adobe commerce 1.2% 987 79% 0.02
Storyblok 0% 11 50% 0.07
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

97% of Wix sites pass CLS. Adobe commerce trails 18 points behind. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone 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, 97% of sites pass the CLS. With Adobe commerce, 79% do. The causal link is weak: the choice mostly marks what kind of site made it.

The split is bigger on LCP. With Shopify, 95% of sites pass it. With WordPress, 70% do.

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 189,915 sites, representing millions of real page loads · How we measured