1
At a glance the headline numbers for Email marketing impact
Performance impact by email_marketing provider.
5
Providers ranked
After min-sites filter
10,914
Sites in sample
Combined across all items
2.0s
Best LCP (p75)
Klaviyo
The State of Web Vitals · October 2026 · 210,902 crawled sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Klaviyo | 2.0s | 87.8% | 3,281 | |
| 2 | Mailchimp | 2.4s | 76.8% | 3,641 | |
| 3 | HubSpot | 2.5s | 76.2% | 3,439 | |
| 4 | Salesforce Marketing Cloud | 2.5s | 75.0% | 65 | |
| 5 | ActiveCampaign | 2.7s | 70.9% | 488 |
The State of Web Vitals · October 2026 · 210,902 crawled sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Klaviyo 1.6% 3,281 2.0s
Iterable 0% 8 1.7s
Mailchimp 1.7% 3,641 2.4s
HubSpot 1.6% 3,439 2.5s
Salesforce Marketing Cloud 0% 65 2.5s
Marketo 0% 43 2.8s
ActiveCampaign 0.2% 488 2.7s
Braze 0% 25 2.7s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good LCP (2.5s at p75) · one value per site
88% of Klaviyo sites pass LCP. ActiveCampaign trails 17 points behind, leaving 29% of its sites failing. computed
The State of Web Vitals · October 2026 · 210,902 crawled sites · 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
Mailchimp 1.7%
772.4s
96123ms
880.02
702.0s
501.5s
HubSpot 1.6%
762.5s
93135ms
860.04
692.0s
511.3s
Klaviyo 1.6%
882.0s
88164ms
900.03
851.5s
81700ms
ActiveCampaign 0.2%
712.7s
93149ms
860.04
622.2s
441.7s
Salesforce Marketing Cloud 0%
752.5s
64226ms
800.08
642.1s
331.5s
Marketo 0%
712.8s
94155ms
820.03
662.0s
501.3s
Braze 0%
672.7s
81190ms
910.08
432.3s
331.4s
Iterable 0%
861.7s
86179ms
710.25
861.3s
86703ms
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.
Klaviyo leads on LCP: 88% of its sites pass. ActiveCampaign trails at 71%. computed
The State of Web Vitals · October 2026 · 210,902 crawled sites · phone field datacorewebvitals.io/state-of-cwv
Related signals Font services (4) → Session recording (11) → CMS (17) → Search (6) → 210,902 crawled sites with Chrome field data, representing millions of real page loads · How we measured
210,902 crawled sites with Chrome field data, representing millions of real page loads. How we measured.