The State of Web Vitals

Ad networks impact

Ad networks ranked by performance impact.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · All devices field outcomes
Metric LCP INP CLS
1

At a glance the headline numbers for Ad networks impact

Ad networks ranked by performance impact.

6
Providers ranked
After min-sites filter
17,836
Sites in sample
Combined across all items
2.1s
Best LCP (p75)
Amazon Publisher Services
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by LCP at p75, fastest first

# Provider LCP p75 Passing Sites
1 Amazon Publisher Services 2.1s 84.6%
298
2 Prebid.js 2.1s 86.2%
837
3 Google Publisher Tag/GAM 2.1s 84.1%
2,834
4 Google AdSense 2.4s 78.4%
12,936
5 Taboola 2.4s 77.5%
481
6 Criteo 2.6s 73.1%
450
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
3

Passing LCP per provider which group passes the LCP most often

ProviderSitesPassing LCPp75
Index Exchange 0% 45 87% 2.2s
Prebid.js 0.4% 837 86% 2.1s
Amazon Publisher Services 0.2% 298 85% 2.1s
Google Publisher Tag/GAM 1.5% 2,834 84% 2.1s
Outbrain 0% 25 80% 1.9s
Google AdSense 6.8% 12,936 78% 2.4s
Taboola 0.3% 481 78% 2.4s
Criteo 0.2% 450 73% 2.6s
Media.net 0% 21 38% 3.7s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good LCP (2.5s at p75) · one value per site

86% of Prebid.js sites pass LCP. Criteo trails 13 points behind, leaving 27% of its sites failing. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
4

All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75

LCP
INP
CLS
FCP
TTFB
Google AdSense 6.8%
782.4s
90151ms
830.07
721.9s
521.3s
Google Publisher Tag/GAM 1.5%
842.1s
87162ms
750.11
831.6s
68930ms
Prebid.js 0.4%
862.1s
86159ms
710.12
851.6s
74839ms
Taboola 0.3%
782.4s
80184ms
690.14
751.8s
66980ms
Criteo 0.2%
732.6s
78188ms
710.13
721.9s
561.1s
Amazon Publisher Services 0.2%
852.1s
80172ms
680.13
861.5s
79731ms
Index Exchange 0%
872.2s
93146ms
730.11
841.4s
80645ms
Outbrain 0%
801.9s
88141ms
840.08
881.3s
72843ms
Media.net 0%
383.7s
88178ms
380.92
432.5s
201.4s
60%95%+ passing Cell: pass rate, small number = p75 · faded rows: under 100 sites

One row per provider, one column per vital - the cell is the share of sites passing, the small number the p75. No toggling needed to see where the category actually differs.

Prebid.js leads on LCP: 86% of its sites pass. Criteo trails at 73%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (23) → Email marketing (8) → Font services (4) → CDN (15) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured