IIS vs OpenGSE
Head-to-head usage across the sites we track.
Top sites by authority
IIS · OpenGSE · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
53
2
Open Page Rank 8+
1,275
22
Open Page Rank 7+
5,011
55
Open Page Rank 6+
9,561
92
Open Page Rank 5+
15,981
198
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
IIS · OpenGSE · share of sites in each country using one or the other
United States
121,069
5,201
India
60,068
9,222
United Kingdom
43,214
2,244
Italy
39,691
1,392
Brazil
35,276
4,270
Germany
31,791
1,463
Canada
31,780
1,355
Türkiye
31,323
1,279
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | IIS | OpenGSE |
|---|---|---|
| LCP | 1.6 s | 2.7 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0.05 |
| TTFB | 700 ms | 1500 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.
IIS to OpenGSE
| Domain | When |
|---|---|
| comereason.org | Apr 2026 |