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
138
Open Page Rank 8+
0
2,041
Open Page Rank 7+
0
7,254
Open Page Rank 6+
0
13,210
Open Page Rank 5+
0
21,676
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
4
323,523
United Kingdom
4
95,135
India
4
78,278
Canada
4
75,350
Brazil
4
73,076
Germany
4
70,758
France
4
65,757
Japan
4
51,705
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Checkly | Sentry |
|---|---|---|
| LCP | 1.6 s | 1.7 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 650 ms | 600 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.