The State of Web Vitals

Personalization impact

Performance impact by personalization provider.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · All devices field outcomes
Metric LCP INP CLS
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
0.04
Best CLS (p75)
Algolia Recommend
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by CLS at p75, fastest first

# Provider CLS p75 Passing Sites
1 Algolia Recommend 0.04 86.4%
13,065
2 Elfsight 0.05 86.3%
2,298
3 Nosto 0.11 74.5%
51
4 Dynamic Yield 0.19 63.5%
65
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices 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 86% 0.04
Elfsight 1.2% 2,298 86% 0.05
Nosto 0% 51 75% 0.11
Dynamic Yield 0% 65 64% 0.19
Klevu 0% 26 54% 0.21
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 86% and 86%. computed

The State of Web Vitals · Q2 2026 · 189,915 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
Algolia Recommend 6.9%
842.1s
95114ms
860.04
781.7s
621.1s
Elfsight 1.2%
822.2s
96113ms
860.05
771.8s
591.2s
Dynamic Yield 0%
702.6s
47295ms
640.19
751.8s
61967ms
Nosto 0%
732.5s
90169ms
750.11
731.8s
521.4s
Klevu 0%
732.5s
96153ms
540.21
811.7s
62938ms
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: 86% of its sites pass. Elfsight trails at 86%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices 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