1
At a glance the headline numbers for Ad networks impact
Ad networks ranked by performance impact.
6
Providers ranked
After min-sites filter
9,463
Sites in sample
Combined across all items
2.1s
Best LCP (p75)
Amazon Publisher Services
The State of Web Vitals · Q1 2026 · 94,910 sites · phone 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 | 82.9% | 158 | |
| 2 | Prebid.js | 2.2s | 84.1% | 441 | |
| 3 | Google Publisher Tag/GAM | 2.2s | 82.5% | 1,487 | |
| 4 | Taboola | 2.3s | 79.5% | 247 | |
| 5 | Google AdSense | 2.4s | 79.1% | 6,899 | |
| 6 | Criteo | 2.4s | 77.2% | 231 |
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Outbrain 0% 8 2.2s
Prebid.js 0.5% 441 2.2s
Amazon Publisher Services 0.2% 158 2.1s
Google Publisher Tag/GAM 1.6% 1,487 2.2s
Taboola 0.3% 247 2.3s
Google AdSense 7.3% 6,899 2.4s
Index Exchange 0% 24 2.3s
Criteo 0.2% 231 2.4s
Media.net 0% 8 3.5s
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 7 points behind. computed
The State of Web Vitals · Q1 2026 · 94,910 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 7.3%
792.4s
85173ms
850.06
731.9s
541.3s
Google Publisher Tag/GAM 1.6%
832.2s
83177ms
760.10
821.6s
70916ms
Prebid.js 0.5%
842.2s
84170ms
710.13
851.6s
74821ms
Taboola 0.3%
802.3s
78183ms
680.14
801.7s
73825ms
Criteo 0.2%
772.4s
73208ms
740.12
741.9s
581.1s
Amazon Publisher Services 0.2%
832.1s
78183ms
720.12
821.6s
77749ms
Index Exchange 0%
772.3s
91154ms
730.12
821.5s
73798ms
Outbrain 0%
862.2s
86154ms
710.13
861.3s
71716ms
Media.net 0%
433.5s
80183ms
430.91
432.6s
172.0s
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 77%. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (22) → Email marketing (7) → Font services (4) → CDN (15) → Chrome field data from 94,910 sites, representing millions of real page loads · How we measured
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.