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
62ms
Best INP (p75)
Google Optimize
The State of Web Vitals · October 2026 · 210,902 crawled sites · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by INP at p75, fastest first
| # | Provider | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Google Optimize | 62ms | 99.2% | 21,150 | |
| 2 | AB Tasty | 95ms | 95.7% | 117 | |
| 3 | VWO | 96ms | 98.0% | 475 | |
| 4 | Convert | 105ms | 98.1% | 210 | |
| 5 | Kameleoon | 117ms | 94.9% | 129 | |
| 6 | Optimizely | 122ms | 91.9% | 157 | |
| 7 | LaunchDarkly | 127ms | 82.2% | 141 | |
| 8 | Dynamic Yield | 178ms | 84.3% | 69 |
The State of Web Vitals · October 2026 · 210,902 crawled sites · desktop 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 62ms
Convert 0.1% 210 105ms
VWO 0.2% 475 96ms
Monetate 0% 28 135ms
AB Tasty 0.1% 117 95ms
Kameleoon 0.1% 129 117ms
Optimizely 0.1% 157 122ms
Dynamic Yield 0% 69 178ms
LaunchDarkly 0.1% 141 127ms
Split.io 0% 9 128ms
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good INP (200ms at p75) · one value per site
99% of Google Optimize sites pass INP. LaunchDarkly trails 17 points behind. computed
The State of Web Vitals · October 2026 · 210,902 crawled sites · desktop 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%
862.0s
9962ms
760.10
811.6s
581.2s
VWO 0.2%
822.3s
9896ms
780.10
771.7s
561.2s
Convert 0.1%
762.5s
98105ms
730.11
732.0s
591.4s
Optimizely 0.1%
742.7s
92122ms
680.14
761.8s
611.1s
LaunchDarkly 0.1%
573.3s
82127ms
670.27
592.5s
73826ms
Kameleoon 0.1%
822.1s
95117ms
720.12
851.6s
541.1s
AB Tasty 0.1%
822.1s
9695ms
710.12
831.5s
70904ms
Dynamic Yield 0%
802.2s
84178ms
650.13
781.5s
70901ms
Monetate 0%
852.1s
96135ms
780.07
931.6s
631.1s
Split.io 0%
333.4s
80128ms
500.32
332.6s
671.8s
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: 99% of its sites pass. LaunchDarkly trails at 82%. computed
The State of Web Vitals · October 2026 · 210,902 crawled sites · desktop 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.