Checkly vs Sentry
Head-to-head usage across the sites we track.
Detections for Checkly end in May 2026. The fingerprint catalog behind our crawls no longer carries that technology as its own entry, usually because it was retired or split into more specific ones, so its figure is the last recorded and is not directly comparable with a currently tracked technology.
Top sites by authority
Checkly · Sentry · how many of each technology's sites sit in the web's highest authority tiers
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
316,827
United Kingdom
3
94,693
India
5
77,149
Canada
4
74,305
Brazil
4
72,498
Germany
4
69,458
France
4
66,242
Japan
4
51,207
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Checkly | Sentry |
|---|---|---|
| LCP | 1.8 s | 1.7 s |
| INP | 87 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 650 ms | 600 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.