Kiwi Sizing vs RichRelevance
Head-to-head usage across the sites we track.
Top sites by authority
Kiwi Sizing · RichRelevance · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
3
0
Open Page Rank 8+
4
2
Open Page Rank 7+
12
13
Open Page Rank 6+
23
19
Open Page Rank 5+
40
33
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 · RichRelevance · share of sites in each country using one or the other
United States
2,106
95
India
962
71
United Kingdom
952
73
Canada
787
73
Australia
688
48
Germany
620
68
France
590
64
Italy
490
57
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Kiwi Sizing | RichRelevance |
|---|---|---|
| LCP | 1.7 s | 2.1 s |
| INP | 100 ms | 100 ms |
| CLS | 0 | 0.05 |
| TTFB | 500 ms | 900 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.