IIS vs TornadoServer
Head-to-head usage across the sites we track.
Top sites by authority
IIS · TornadoServer · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
53
1
Open Page Rank 8+
1,275
8
Open Page Rank 7+
5,011
19
Open Page Rank 6+
9,561
28
Open Page Rank 5+
15,981
33
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
IIS · TornadoServer · share of sites in each country using one or the other
United States
121,069
201
India
60,068
156
United Kingdom
43,214
114
Italy
39,691
91
Brazil
35,276
92
Germany
31,791
123
Canada
31,780
108
Türkiye
31,323
84
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | IIS | TornadoServer |
|---|---|---|
| LCP | 1.6 s | 1.8 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 600 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 TornadoServer
| Domain | When |
|---|---|
| cmenergyshipping.com | Aug 2026 |
TornadoServer to IIS
| Domain | When |
|---|---|
| hotels-kefalonia.net | Nov 2025 |