1
At a glance the headline numbers for Personalization impact
Performance impact by personalization provider.
4
Providers ranked
After min-sites filter
15,479
Sites in sample
Combined across all items
0.10
Best CLS (p75)
Algolia Recommend
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Algolia Recommend | 0.10 | 77.1% | 13,065 | |
| 2 | Elfsight | 0.11 | 73.3% | 2,298 | |
| 3 | Dynamic Yield | 0.13 | 64.0% | 65 | |
| 4 | Nosto | 0.17 | 60.0% | 51 |
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Algolia Recommend 6.9%
13,065
0.10
Elfsight 1.2%
2,298
0.11
Dynamic Yield 0%
65
0.13
Klevu 0%
26
0.13
Nosto 0%
51
0.17
Good
Needs Improvement
Poor
Sorted best-passing first · median colored by its own rating · pass = good CLS (0.1 at p75) · one value per site
No provider stands out: pass rates sit between 73% and 77%. computed
The State of Web Vitals · Q2 2026 · 189,915 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
Algolia Recommend 6.9%
872.0s
9969ms
770.10
831.5s
641.1s
Elfsight 1.2%
852.1s
10072ms
730.11
811.6s
591.2s
Dynamic Yield 0%
782.2s
83188ms
640.13
761.5s
68985ms
Nosto 0%
782.3s
100106ms
600.17
781.6s
551.1s
Klevu 0%
802.4s
100100ms
640.13
801.5s
60845ms
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.
Algolia Recommend leads on CLS: 77% of its sites pass. Elfsight trails at 73%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
Related signals
JS libraries (23) →
Tag managers (8) →
A/B testing (10) →
Chat & messaging (17) →
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.