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+
27
199
Open Page Rank 7+
71
587
Open Page Rank 6+
118
1,124
Open Page Rank 5+
169
2,074
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
669
18,062
Germany
164
18,452
India
296
8,027
France
213
6,306
Italy
150
5,616
United Kingdom
288
5,376
Canada
278
4,350
Spain
167
3,324
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, Jun 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 |