1
At a glance the headline numbers for Scheduling impact
Performance impact by scheduling provider.
1
Providers ranked
After min-sites filter
823
Sites in sample
Combined across all items
0.04
Best CLS (p75)
Calendly
The State of Web Vitals · Q1 2026 · 94,910 sites · all devices field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Calendly | 0.04 | 88.7% | 823 |
The State of Web Vitals · Q1 2026 · 94,910 sites · all devices field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Cal.com 0% 5 0.04
Calendly 0.9% 823 0.04
Acuity Scheduling 0% 6 0.14
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good CLS (0.1 at p75) · one value per site
The State of Web Vitals · Q1 2026 · 94,910 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
Calendly 0.9%
832.2s
98105ms
890.04
781.7s
571.1s
Acuity Scheduling 0%
1001.8s
80195ms
670.14
1001.3s
100587ms
Cal.com 0%
752.8s
67256ms
1000.04
801.6s
751.2s
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.
The State of Web Vitals · Q1 2026 · 94,910 sites · all devices field datacorewebvitals.io/state-of-cwv
Related signals Reviews (8) → Customer data platforms (5) → Analytics (20) → Consent platforms (16) → 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.