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
1.9s
Best LCP (p75)
Klaviyo
The State of Web Vitals · October 2026 · 210,902 crawled sites · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Klaviyo | 1.9s | 90.2% | 3,281 | |
| 2 | HubSpot | 2.1s | 85.6% | 3,439 | |
| 3 | Mailchimp | 2.3s | 79.9% | 3,641 | |
| 4 | ActiveCampaign | 2.3s | 79.6% | 488 | |
| 5 | Salesforce Marketing Cloud | 2.4s | 76.6% | 65 |
The State of Web Vitals · October 2026 · 210,902 crawled sites · desktop 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 1.9s
HubSpot 1.6% 3,439 2.1s
Iterable 0% 8 1.8s
Mailchimp 1.7% 3,641 2.3s
ActiveCampaign 0.2% 488 2.3s
Marketo 0% 43 2.4s
Salesforce Marketing Cloud 0% 65 2.4s
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
90% of Klaviyo sites pass LCP. ActiveCampaign trails 10 points behind. computed
The State of Web Vitals · October 2026 · 210,902 crawled sites · desktop 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%
802.3s
10065ms
760.10
751.8s
511.4s
HubSpot 1.6%
862.1s
9968ms
790.09
811.6s
601.2s
Klaviyo 1.6%
901.9s
9988ms
790.08
881.3s
80664ms
ActiveCampaign 0.2%
802.3s
9972ms
770.10
731.9s
461.5s
Salesforce Marketing Cloud 0%
772.4s
98114ms
470.18
662.0s
521.6s
Marketo 0%
792.4s
10076ms
630.18
761.8s
631.1s
Braze 0%
712.7s
95121ms
760.07
672.1s
521.4s
Iterable 0%
831.8s
83112ms
670.26
83970ms
83557ms
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: 90% of its sites pass. ActiveCampaign trails at 80%. computed
The State of Web Vitals · October 2026 · 210,902 crawled sites · desktop 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.