Checkly vs Sentry
Head-to-head usage across the sites we track.
Top sites by authority
Checkly · Sentry · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
136
Open Page Rank 8+
0
2,050
Open Page Rank 7+
0
7,315
Open Page Rank 6+
1
13,313
Open Page Rank 5+
1
21,753
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Checkly · Sentry · share of sites in each country using one or the other
United States
5
359,106
United Kingdom
4
105,998
India
4
86,387
Canada
4
84,660
Germany
4
77,287
France
5
75,293
Brazil
4
74,887
Japan
4
58,513
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Checkly | Sentry |
|---|---|---|
| LCP | 1.8 s | 1.6 s |
| INP | 62 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 600 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.