CartStack vs Keptify
Head-to-head usage across the sites we track.
Top sites by authority
CartStack · Keptify · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 8+
4
0
Open Page Rank 7+
19
0
Open Page Rank 6+
30
0
Open Page Rank 5+
51
1
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
CartStack · Keptify · share of sites in each country using one or the other
Brazil
2,932
1
United States
1,129
22
Canada
236
4
India
149
4
United Kingdom
141
4
Portugal
120
1
Australia
100
3
Italy
100
2
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | CartStack | Keptify |
|---|---|---|
| LCP | 2 s | 2 s |
| INP | 100 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 1000 ms | 700 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.