1
At a glance the headline numbers for A/B testing impact
Performance impact by ab_testing provider.
8
Providers ranked
After min-sites filter
22,448
Sites in sample
Combined across all items
104ms
Best INP (p75)
Google Optimize
The State of Web Vitals · October 2026 · 210,902 crawled sites · all devices field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by INP at p75, fastest first
| # | Provider | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Google Optimize | 104ms | 95.9% | 21,150 | |
| 2 | AB Tasty | 169ms | 84.0% | 117 | |
| 3 | VWO | 179ms | 80.9% | 475 | |
| 4 | Convert | 181ms | 87.0% | 210 | |
| 5 | LaunchDarkly | 194ms | 77.2% | 141 | |
| 6 | Optimizely | 203ms | 74.5% | 157 | |
| 7 | Kameleoon | 206ms | 73.2% | 129 | |
| 8 | Dynamic Yield | 287ms | 49.1% | 69 |
The State of Web Vitals · October 2026 · 210,902 crawled sites · all devices field datacorewebvitals.io/state-of-cwv
3
Passing INP per provider which group passes the INP most often
ProviderSitesPassing INPp75
Google Optimize 10% 21,150 104ms
Convert 0.1% 210 181ms
AB Tasty 0.1% 117 169ms
VWO 0.2% 475 179ms
LaunchDarkly 0.1% 141 194ms
Optimizely 0.1% 157 203ms
Kameleoon 0.1% 129 206ms
Monetate 0% 28 209ms
Split.io 0% 9 267ms
Dynamic Yield 0% 69 287ms
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good INP (200ms at p75) · one value per site
96% of Google Optimize sites pass INP. Kameleoon trails 23 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 Optimize 10%
822.2s
96104ms
860.05
751.8s
551.3s
VWO 0.2%
782.4s
81179ms
830.05
721.9s
561.1s
Convert 0.1%
722.6s
87181ms
810.07
751.8s
571.3s
Optimizely 0.1%
702.7s
75203ms
770.10
652.2s
471.3s
LaunchDarkly 0.1%
513.8s
77194ms
750.11
512.7s
531.2s
Kameleoon 0.1%
772.4s
73206ms
720.12
721.9s
541.1s
AB Tasty 0.1%
772.4s
84169ms
710.12
711.9s
621.0s
Dynamic Yield 0%
722.6s
49287ms
660.18
751.8s
62963ms
Monetate 0%
862.3s
73209ms
750.10
791.7s
431.0s
Split.io 0%
333.3s
63267ms
440.34
442.6s
56884ms
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.
Google Optimize leads on INP: 96% of its sites pass. Kameleoon 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 Maps (4) → CDN (16) → Chat & messaging (17) → Bot detection (8) → 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.