Cowboy vs IIS
Head-to-head usage across the sites we track.
Top sites by authority
Cowboy · IIS · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
53
Open Page Rank 8+
13
1,275
Open Page Rank 7+
26
5,011
Open Page Rank 6+
42
9,561
Open Page Rank 5+
56
15,981
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Cowboy · IIS · share of sites in each country using one or the other
United States
3,150
121,069
India
1,531
60,068
United Kingdom
1,488
43,214
Italy
942
39,691
Brazil
2,387
35,276
Canada
1,344
31,780
Germany
1,174
31,791
Türkiye
609
31,323
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Cowboy | IIS |
|---|---|---|
| LCP | 1.9 s | 1.6 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 700 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.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
Cowboy to IIS
| Domain | When |
|---|---|
| veezu.co.uk | May 2026 |