Bookero vs Calendly
Head-to-head usage across the sites we track.
Top sites by authority
Bookero · Calendly · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
1
25
Open Page Rank 8+
2
189
Open Page Rank 7+
5
566
Open Page Rank 6+
5
1,090
Open Page Rank 5+
8
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
Bookero · Calendly · share of sites in each country using one or the other
United States
8
16,610
Germany
17
16,330
India
7
7,172
France
7
5,006
Italy
10
4,959
United Kingdom
12
4,612
Canada
5
3,850
Spain
7
2,825
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bookero | Calendly |
|---|---|---|
| LCP | 2 s | 1.9 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 1000 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.