1
At a glance the headline numbers for Personalization impact
Performance impact by personalization provider.
2
Providers ranked
After min-sites filter
8,167
Sites in sample
Combined across all items
0.04
Best CLS (p75)
Algolia Recommend
The State of Web Vitals · Q1 2026 · 94,910 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 | 86.5% | 6,936 | |
| 2 | Elfsight | 0.05 | 85.3% | 1,231 |
The State of Web Vitals · Q1 2026 · 94,910 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 7.3% 6,936 0.04
Elfsight 1.3% 1,231 0.05
Nosto 0% 30 0.10
Dynamic Yield 0% 37 0.18
Klevu 0% 17 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 85% and 87%. computed
The State of Web Vitals · Q1 2026 · 94,910 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 7.3%
842.1s
95114ms
870.04
781.7s
621.1s
Elfsight 1.3%
822.2s
97113ms
850.05
781.7s
601.2s
Dynamic Yield 0%
662.9s
57297ms
630.18
662.1s
541.2s
Nosto 0%
802.3s
90170ms
770.10
801.5s
571.1s
Klevu 0%
772.5s
100155ms
590.21
771.6s
59962ms
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: 87% of its sites pass. Elfsight trails at 85%. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · all devices field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (22) → Tag managers (8) → A/B testing (10) → Chat & messaging (16) → 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.