1
At a glance the headline numbers for Email marketing impact
Performance impact by email_marketing provider.
5
Providers ranked
After min-sites filter
9,766
Sites in sample
Combined across all items
104ms
Best INP (p75)
Mailchimp
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by INP at p75, fastest first
| # | Provider | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Mailchimp | 104ms | 97.9% | 3,276 | |
| 2 | HubSpot | 110ms | 97.2% | 3,075 | |
| 3 | ActiveCampaign | 119ms | 96.3% | 438 | |
| 4 | Klaviyo | 145ms | 92.9% | 2,914 | |
| 5 | Salesforce Marketing Cloud | 202ms | 74.2% | 63 |
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
3
Passing INP per provider which group passes the INP most often
ProviderSitesPassing INPp75
Mailchimp 1.7%
3,276
104ms
Marketo 0%
40
114ms
HubSpot 1.6%
3,075
110ms
ActiveCampaign 0.2%
438
119ms
Klaviyo 1.5%
2,914
145ms
Iterable 0%
8
157ms
Braze 0%
20
184ms
Salesforce Marketing Cloud 0%
63
202ms
Good
Needs Improvement
Poor
Sorted best-passing first · median colored by its own rating · pass = good INP (200ms at p75) · one value per site
98% of Mailchimp sites pass INP. Klaviyo trails 5 points behind. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices 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
98104ms
870.04
702.0s
491.5s
HubSpot 1.6%
792.3s
97110ms
840.06
731.9s
541.3s
Klaviyo 1.5%
882.0s
93145ms
890.04
861.4s
81691ms
ActiveCampaign 0.2%
702.7s
96119ms
850.06
632.2s
401.7s
Salesforce Marketing Cloud 0%
752.5s
74202ms
780.10
642.1s
371.5s
Marketo 0%
802.4s
97114ms
680.11
751.8s
551.2s
Braze 0%
652.7s
85184ms
900.07
452.2s
301.5s
Iterable 0%
881.6s
88157ms
630.34
881.3s
88683ms
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: 98% of its sites pass. Klaviyo trails at 93%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
Related signals
Font services (4) →
Session recording (11) →
Search (5) →
Performance services (8) →
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.