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+
50
1
Open Page Rank 8+
1,251
4
Open Page Rank 7+
4,874
15
Open Page Rank 6+
9,276
22
Open Page Rank 5+
15,469
26
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
117,730
207
India
58,829
152
United Kingdom
42,820
116
Italy
40,808
91
Brazil
34,656
95
Canada
31,601
107
Türkiye
31,246
87
Germany
31,200
119
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | IIS | TornadoServer |
|---|---|---|
| LCP | 1.7 s | 1.7 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 600 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 TornadoServer
| Domain | When |
|---|---|
| cmenergyshipping.com | Aug 2026 |
TornadoServer to IIS
| Domain | When |
|---|---|
| hotels-kefalonia.net | Nov 2025 |