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
24
Open Page Rank 8+
2
188
Open Page Rank 7+
5
578
Open Page Rank 6+
5
1,095
Open Page Rank 5+
8
2,029
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
16,543
Germany
16
16,090
India
6
7,113
France
5
5,462
Italy
9
5,184
United Kingdom
13
4,681
Canada
4
3,854
Spain
7
3,136
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bookero | 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, Sep 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.