Calendly vs Sirvoy
Head-to-head usage across the sites we track.
Top sites by authority
Calendly · Sirvoy · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
25
1
Open Page Rank 8+
189
1
Open Page Rank 7+
566
1
Open Page Rank 6+
1,090
1
Open Page Rank 5+
2,024
2
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Calendly · Sirvoy · share of sites in each country using one or the other
United States
16,610
24
Germany
16,330
22
India
7,172
3
France
5,006
11
Italy
4,959
6
United Kingdom
4,612
4
Canada
3,850
8
Spain
2,825
9
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Calendly | Sirvoy |
|---|---|---|
| LCP | 1.9 s | 1.8 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 800 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.