Personalization impact Shopify sites
Performance impact by personalization provider.
1
At a glance the headline numbers for Personalization impact
Performance impact by personalization provider.
2
Providers ranked
After min-sites filter
1,368
Sites in sample
Combined across all items
0.01
Best CLS (p75)
Elfsight
The State of Web Vitals · October 2026 · Shopify sites (8,248) · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Elfsight | 0.01 | 95.1% | 108 | |
| 2 | Algolia Recommend | 0.03 | 91.9% | 1,260 |
The State of Web Vitals · October 2026 · Shopify sites (8,248) · phone field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Elfsight 1.3% 108 0.01
Algolia Recommend 15.3% 1,260 0.03
Nosto 0.3% 26 0.06
Klevu 0.1% 6 0.16
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 92% and 95%. computed
The State of Web Vitals · October 2026 · Shopify sites (8,248) · phone 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 15.3%
921.9s
90162ms
920.03
921.3s
95554ms
Elfsight 1.3%
951.9s
94131ms
950.01
861.3s
92491ms
Nosto 0.3%
921.9s
83179ms
880.06
961.3s
92515ms
Klevu 0.1%
672.3s
67195ms
670.16
1001.5s
83532ms
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.
Elfsight leads on CLS: 95% of its sites pass. Algolia Recommend trails at 92%. computed
The State of Web Vitals · October 2026 · Shopify sites (8,248) · phone field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (26) → Tag managers (8) → A/B testing (12) → Chat & messaging (17) → 203,892 crawled sites with Chrome field data, representing millions of real page loads · How we measured
203,892 crawled sites with Chrome field data, representing millions of real page loads. How we measured.