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+
61
2
Open Page Rank 8+
1,315
11
Open Page Rank 7+
5,213
22
Open Page Rank 6+
9,906
32
Open Page Rank 5+
16,556
38
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
136,825
225
India
68,343
172
United Kingdom
49,161
139
Italy
46,831
115
Brazil
38,951
105
Türkiye
36,724
105
Canada
36,284
130
Germany
36,200
133
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | IIS | TornadoServer |
|---|---|---|
| LCP | 1.7 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, 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.
TornadoServer to IIS
| Domain | When |
|---|---|
| hotels-kefalonia.net | Nov 2025 |