AddEvent vs Calendly
Head-to-head usage across the sites we track.
Top sites by authority
AddEvent · Calendly · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
5
25
Open Page Rank 8+
25
189
Open Page Rank 7+
65
566
Open Page Rank 6+
113
1,090
Open Page Rank 5+
159
2,024
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
AddEvent · Calendly · share of sites in each country using one or the other
United States
588
16,610
Germany
150
16,330
India
253
7,172
France
161
5,006
Italy
130
4,959
United Kingdom
253
4,612
Canada
232
3,850
Spain
135
2,825
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | AddEvent | Calendly |
|---|---|---|
| LCP | 1.9 s | 1.9 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 800 ms |
Median site's p75 values from the Chrome UX Report, Aug 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
AddEvent to Calendly
| Domain | When |
|---|---|
| gspdx.org | Oct 2025 |