Kiwi Sizing vs Raptor
Head-to-head usage across the sites we track.
Top sites by authority
Kiwi Sizing · Raptor · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
4
0
Open Page Rank 8+
6
0
Open Page Rank 7+
14
0
Open Page Rank 6+
24
2
Open Page Rank 5+
40
8
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Kiwi Sizing · Raptor · share of sites in each country using one or the other
United States
2,456
26
United Kingdom
1,161
30
India
1,134
20
Canada
927
8
Germany
735
46
Australia
765
6
France
712
33
Italy
547
19
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Kiwi Sizing | Raptor |
|---|---|---|
| LCP | 1.7 s | 1.5 s |
| INP | 100 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 700 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.