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
2.2s
Best LCP (p75)
Prebid.js
The State of Web Vitals · October 2026 · 210,902 crawled sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Prebid.js | 2.2s | 83.8% | 940 | |
| 2 | Index Exchange | 2.2s | 80.4% | 53 | |
| 3 | Google Publisher Tag/GAM | 2.2s | 82.4% | 3,188 | |
| 4 | Amazon Publisher Services | 2.2s | 80.7% | 327 | |
| 5 | Google AdSense | 2.4s | 78.5% | 14,427 | |
| 6 | Taboola | 2.4s | 75.9% | 529 | |
| 7 | Criteo | 2.6s | 71.6% | 490 |
The State of Web Vitals · October 2026 · 210,902 crawled sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Outbrain 0% 29 1.9s
Prebid.js 0.4% 940 2.2s
Google Publisher Tag/GAM 1.5% 3,188 2.2s
Amazon Publisher Services 0.2% 327 2.2s
Index Exchange 0% 53 2.2s
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
84% of Prebid.js sites pass LCP. Criteo trails 12 points behind, leaving 28% of its sites failing. computed
The State of Web Vitals · October 2026 · 210,902 crawled sites · phone 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
84174ms
840.06
721.9s
541.3s
Google Publisher Tag/GAM 1.5%
822.2s
83178ms
750.10
811.6s
68931ms
Prebid.js 0.4%
842.2s
83172ms
720.12
831.6s
73856ms
Taboola 0.3%
762.4s
77194ms
690.13
731.9s
66958ms
Criteo 0.2%
722.6s
71214ms
710.14
711.9s
551.2s
Amazon Publisher Services 0.2%
812.2s
76195ms
700.13
811.6s
77752ms
Index Exchange 0%
802.2s
92153ms
770.10
801.5s
77725ms
Outbrain 0%
851.9s
89158ms
820.07
931.3s
82594ms
Media.net 0%
393.7s
93178ms
390.92
332.6s
121.6s
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: 84% of its sites pass. Criteo trails at 72%. computed
The State of Web Vitals · October 2026 · 210,902 crawled sites · phone 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.