1
At a glance the headline numbers for Ad networks impact
Ad networks ranked by performance impact.
7
Providers ranked
After min-sites filter
19,954
Sites in sample
Combined across all items
2.1s
Best LCP (p75)
Prebid.js
The State of Web Vitals · October 2026 · 210,902 crawled 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 | Prebid.js | 2.1s | 85.5% | 940 | |
| 2 | Google Publisher Tag/GAM | 2.1s | 83.9% | 3,188 | |
| 3 | Amazon Publisher Services | 2.1s | 84.4% | 327 | |
| 4 | Index Exchange | 2.3s | 79.2% | 53 | |
| 5 | Google AdSense | 2.4s | 78.5% | 14,427 | |
| 6 | Taboola | 2.4s | 78.4% | 529 | |
| 7 | Criteo | 2.6s | 73.0% | 490 |
The State of Web Vitals · October 2026 · 210,902 crawled sites · all devices field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Prebid.js 0.4% 940 2.1s
Amazon Publisher Services 0.2% 327 2.1s
Google Publisher Tag/GAM 1.5% 3,188 2.1s
Outbrain 0% 29 1.9s
Index Exchange 0% 53 2.3s
Google AdSense 6.8% 14,427 2.4s
Taboola 0.3% 529 2.4s
Criteo 0.2% 490 2.6s
Media.net 0% 22 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 · October 2026 · 210,902 crawled 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%
792.4s
90151ms
830.07
721.9s
521.3s
Google Publisher Tag/GAM 1.5%
842.1s
87163ms
750.11
821.6s
68938ms
Prebid.js 0.4%
862.1s
86161ms
700.12
841.6s
74842ms
Taboola 0.3%
782.4s
80184ms
700.14
741.8s
66966ms
Criteo 0.2%
732.6s
76197ms
700.14
721.9s
571.1s
Amazon Publisher Services 0.2%
842.1s
82170ms
670.13
851.5s
79733ms
Index Exchange 0%
792.3s
93151ms
720.11
811.5s
77786ms
Outbrain 0%
791.9s
89154ms
830.08
901.3s
76748ms
Media.net 0%
413.7s
89178ms
410.92
462.5s
191.4s
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 · October 2026 · 210,902 crawled sites · all devices field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (26) → Email marketing (8) → Font services (4) → CDN (16) → 210,902 crawled sites with Chrome field data, representing millions of real page loads · How we measured
210,902 crawled sites with Chrome field data, representing millions of real page loads. How we measured.