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
123ms
Best INP (p75)
Mailchimp
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by INP at p75, fastest first
| # | Provider | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Mailchimp | 123ms | 96.2% | 3,276 | |
| 2 | HubSpot | 134ms | 93.6% | 3,075 | |
| 3 | ActiveCampaign | 148ms | 92.7% | 438 | |
| 4 | Klaviyo | 163ms | 88.8% | 2,914 | |
| 5 | Salesforce Marketing Cloud | 220ms | 63.9% | 63 |
The State of Web Vitals · Q2 2026 · 189,915 sites · phone 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
123ms
Marketo 0%
40
156ms
HubSpot 1.6%
3,075
134ms
ActiveCampaign 0.2%
438
148ms
Klaviyo 1.5%
2,914
163ms
Iterable 0%
8
179ms
Braze 0%
20
186ms
Salesforce Marketing Cloud 0%
63
220ms
Good
Needs Improvement
Poor
Sorted best-passing first · median colored by its own rating · pass = good INP (200ms at p75) · one value per site
96% of Mailchimp sites pass INP. Klaviyo trails 7 points behind. computed
The State of Web Vitals · Q2 2026 · 189,915 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
491.4s
HubSpot 1.6%
772.4s
94134ms
860.04
692.0s
521.3s
Klaviyo 1.5%
872.0s
89163ms
900.03
851.5s
80710ms
ActiveCampaign 0.2%
692.7s
93148ms
850.04
602.3s
431.7s
Salesforce Marketing Cloud 0%
742.5s
64220ms
790.09
632.1s
341.5s
Marketo 0%
722.6s
94156ms
830.03
642.0s
501.4s
Braze 0%
672.7s
83186ms
890.08
442.2s
331.3s
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.
Mailchimp leads on INP: 96% of its sites pass. Klaviyo trails at 89%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · phone 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.