1
At a glance the headline numbers for Email marketing impact
Performance impact by email_marketing provider.
4
Providers ranked
After min-sites filter
5,151
Sites in sample
Combined across all items
64ms
Best INP (p75)
Mailchimp
The State of Web Vitals · Q1 2026 · 94,910 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 | 99.9% | 1,748 | |
| 2 | HubSpot | 68ms | 98.7% | 1,645 | |
| 3 | ActiveCampaign | 73ms | 100.0% | 238 | |
| 4 | Klaviyo | 87ms | 99.0% | 1,520 |
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing INP per provider which group passes the INP most often
ProviderSitesPassing INPp75
ActiveCampaign 0.3% 238 73ms
Marketo 0% 22 71ms
Mailchimp 1.8% 1,748 64ms
Klaviyo 1.6% 1,520 87ms
HubSpot 1.7% 1,645 68ms
Salesforce Marketing Cloud 0% 30 95ms
Braze 0% 12 123ms
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 · Q1 2026 · 94,910 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 1.8%
802.3s
10064ms
770.10
761.8s
521.4s
HubSpot 1.7%
872.0s
9968ms
810.08
831.6s
611.1s
Klaviyo 1.6%
901.9s
9987ms
780.09
871.3s
80669ms
ActiveCampaign 0.3%
842.2s
10073ms
770.10
771.7s
501.3s
Salesforce Marketing Cloud 0%
832.3s
9795ms
480.18
662.1s
591.6s
Marketo 0%
712.7s
10071ms
620.22
711.8s
671.1s
Braze 0%
583.0s
92123ms
920.03
582.3s
421.5s
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. Klaviyo trails at 99%. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
Related signals Font services (4) → Session recording (11) → Search (4) → Performance services (8) → Chrome field data from 94,910 sites, representing millions of real page loads · How we measured
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.