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+
61
2
Open Page Rank 8+
1,315
28
Open Page Rank 7+
5,213
61
Open Page Rank 6+
9,906
98
Open Page Rank 5+
16,556
214
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
136,825
6,047
India
68,343
10,666
United Kingdom
49,161
2,583
Italy
46,831
1,758
Brazil
38,951
4,848
Türkiye
36,724
1,654
Germany
36,200
1,844
Canada
36,284
1,662
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 | 1400 ms |
Median site's p75 values from the Chrome UX Report, Jun 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 |