Astra vs Understrap
Head-to-head usage across the sites we track.
Top sites by authority
Astra · Understrap · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
21
3
Open Page Rank 8+
312
32
Open Page Rank 7+
915
81
Open Page Rank 6+
1,690
127
Open Page Rank 5+
3,081
207
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Astra · Understrap · share of sites in each country using one or the other
United States
61,862
1,999
India
47,125
395
Spain
22,977
320
France
19,758
404
Brazil
19,843
216
Germany
19,508
436
United Kingdom
18,404
995
Indonesia
17,425
177
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Astra | Understrap |
|---|---|---|
| LCP | 2.5 s | 1.9 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 1300 ms | 1000 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.