1
At a glance the headline numbers for Ad networks impact
Ad networks ranked by performance impact.
6
Providers ranked
After min-sites filter
17,864
Sites in sample
Combined across all items
2.2s
Best LCP (p75)
Prebid.js
The State of Web Vitals · Q2 2026 · 189,915 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 | 84.3% | 841 | |
| 2 | Amazon Publisher Services | 2.2s | 81.2% | 299 | |
| 3 | Google Publisher Tag/GAM | 2.2s | 82.4% | 2,840 | |
| 4 | Google AdSense | 2.4s | 78.3% | 12,952 | |
| 5 | Taboola | 2.5s | 75.0% | 482 | |
| 6 | Criteo | 2.6s | 70.7% | 450 |
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Index Exchange 0% 45 2.2s
Prebid.js 0.4% 841 2.2s
Outbrain 0% 25 2.0s
Google Publisher Tag/GAM 1.5% 2,840 2.2s
Amazon Publisher Services 0.2% 299 2.2s
Google AdSense 6.8% 12,952 2.4s
Taboola 0.3% 482 2.5s
Criteo 0.2% 450 2.6s
Media.net 0% 21 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 13 points behind, leaving 29% of its sites failing. computed
The State of Web Vitals · Q2 2026 · 189,915 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
Criteo 0.2%
712.6s
73208ms
720.13
712.0s
541.2s
Google Publisher Tag/GAM 1.5%
822.2s
83177ms
750.10
821.6s
68925ms
Amazon Publisher Services 0.2%
812.2s
75197ms
690.13
821.6s
77745ms
Outbrain 0%
832.0s
87145ms
830.07
911.3s
78609ms
Index Exchange 0%
862.2s
93152ms
790.09
841.5s
79709ms
Google AdSense 6.8%
782.4s
84173ms
840.06
721.9s
531.3s
Prebid.js 0.4%
842.2s
83171ms
720.12
841.6s
73843ms
Taboola 0.3%
752.5s
77194ms
680.14
731.9s
66967ms
Media.net 0%
353.7s
92178ms
350.92
292.6s
131.6s
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 71%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (25) → Email marketing (8) → Font services (4) → CDN (16) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured
Chrome field data from 189,915 sites, representing millions of real page loads. How we measured.