Email marketing impact Shopify sites
Performance impact by email_marketing provider.
1
At a glance the headline numbers for Email marketing impact
Performance impact by email_marketing provider.
3
Providers ranked
After min-sites filter
3,118
Sites in sample
Combined across all items
0.06
Best CLS (p75)
HubSpot
The State of Web Vitals · October 2026 · Shopify sites (8,248) · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | HubSpot | 0.06 | 86.1% | 117 | |
| 2 | Mailchimp | 0.07 | 82.7% | 648 | |
| 3 | Klaviyo | 0.07 | 82.2% | 2,353 |
The State of Web Vitals · October 2026 · Shopify sites (8,248) · desktop field datacorewebvitals.io/state-of-cwv
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Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
HubSpot 1.4% 117 0.06
Mailchimp 7.9% 648 0.07
Klaviyo 28.5% 2,353 0.07
ActiveCampaign 0.2% 17 0.11
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 82% and 86%. computed
The State of Web Vitals · October 2026 · Shopify sites (8,248) · desktop field datacorewebvitals.io/state-of-cwv
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All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75
LCP
INP
CLS
FCP
TTFB
Klaviyo 28.5%
951.7s
9989ms
820.07
951.1s
96480ms
Mailchimp 7.9%
971.6s
10068ms
830.07
97987ms
97470ms
HubSpot 1.4%
961.7s
9779ms
860.06
97979ms
92465ms
ActiveCampaign 0.2%
1001.1s
10066ms
730.11
100813ms
100324ms
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.
HubSpot leads on CLS: 86% of its sites pass. Klaviyo trails at 82%. computed
The State of Web Vitals · October 2026 · Shopify sites (8,248) · desktop field datacorewebvitals.io/state-of-cwv
Related signals Font services (4) → Session recording (11) → CMS (17) → Search (6) → 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.