Letro vs Loox
Head-to-head usage across the sites we track.
Top sites by authority
Letro · Loox · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
3
Open Page Rank 8+
3
8
Open Page Rank 7+
9
20
Open Page Rank 6+
14
44
Open Page Rank 5+
33
88
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Letro · Loox · share of sites in each country using one or the other
United States
19
12,331
United Kingdom
9
4,338
Germany
8
3,654
Australia
12
3,412
Canada
10
3,358
France
8
3,021
India
9
2,879
Italy
8
1,990
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Letro | Loox |
|---|---|---|
| LCP | 1.8 s | 1.6 s |
| INP | 125 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 650 ms | 500 ms |
Median site's p75 values from the Chrome UX Report, Sep 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.