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+
298
30
Open Page Rank 7+
889
76
Open Page Rank 6+
1,677
120
Open Page Rank 5+
3,030
198
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
54,700
1,771
India
40,848
348
Spain
19,785
278
Germany
17,658
374
Brazil
17,822
202
United Kingdom
16,239
872
France
16,604
318
Indonesia
14,649
154
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Astra | Understrap |
|---|---|---|
| LCP | 2.4 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, 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.