1
At a glance the headline numbers for Email marketing impact
Performance impact by email_marketing provider.
5
Providers ranked
After min-sites filter
9,785
Sites in sample
Combined across all items
64ms
Best INP (p75)
Mailchimp
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by INP at p75, fastest first
| # | Provider | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Mailchimp | 64ms | 99.8% | 3,286 | |
| 2 | HubSpot | 68ms | 99.1% | 3,078 | |
| 3 | ActiveCampaign | 72ms | 99.1% | 441 | |
| 4 | Klaviyo | 87ms | 99.3% | 2,917 | |
| 5 | Salesforce Marketing Cloud | 115ms | 98.4% | 63 |
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing INP per provider which group passes the INP most often
ProviderSitesPassing INPp75
Marketo 0% 40 71ms
Mailchimp 1.7% 3,286 64ms
Klaviyo 1.5% 2,917 87ms
ActiveCampaign 0.2% 441 72ms
HubSpot 1.6% 3,078 68ms
Salesforce Marketing Cloud 0% 63 115ms
Braze 0% 20 126ms
Iterable 0% 8 122ms
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good INP (200ms at p75) · one value per site
No provider stands out: pass rates sit between 99% and 100%. computed
The State of Web Vitals · Q2 2026 · 189,915 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
Klaviyo 1.5%
901.9s
9987ms
790.09
881.3s
80669ms
Mailchimp 1.7%
802.2s
10064ms
760.10
761.8s
511.4s
ActiveCampaign 0.2%
792.3s
9972ms
770.10
721.9s
451.6s
HubSpot 1.6%
862.0s
9968ms
790.08
811.6s
611.2s
Salesforce Marketing Cloud 0%
762.4s
98115ms
470.18
652.0s
501.6s
Braze 0%
682.8s
95126ms
790.07
632.2s
471.5s
Marketo 0%
782.4s
10071ms
650.18
761.8s
621.1s
Iterable 0%
832.0s
83122ms
670.34
831.0s
83628ms
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.
Mailchimp leads on INP: 100% of its sites pass. HubSpot trails at 99%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
Related signals Font services (4) → Session recording (11) → CMS (17) → Search (6) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured
Chrome field data from 189,915 sites, representing millions of real page loads. How we measured.