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+
50
2
Open Page Rank 8+
1,251
21
Open Page Rank 7+
4,874
55
Open Page Rank 6+
9,276
92
Open Page Rank 5+
15,469
197
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
117,730
5,095
India
58,829
9,044
United Kingdom
42,820
2,197
Italy
40,808
1,437
Brazil
34,656
4,120
Canada
31,601
1,341
Germany
31,200
1,397
Türkiye
31,246
1,250
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | IIS | OpenGSE |
|---|---|---|
| LCP | 1.7 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, 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.
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 |