IIS vs Microsoft HTTPAPI
Head-to-head usage across the sites we track.
Top sites by authority
IIS · Microsoft HTTPAPI · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
61
12
Open Page Rank 8+
1,315
54
Open Page Rank 7+
5,213
137
Open Page Rank 6+
9,906
222
Open Page Rank 5+
16,556
305
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
IIS · Microsoft HTTPAPI · share of sites in each country using one or the other
United States
136,825
3,242
India
68,343
1,959
United Kingdom
49,161
1,705
Italy
46,831
1,151
Brazil
38,951
1,084
Canada
36,284
1,540
Germany
36,200
1,446
Türkiye
36,724
876
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | IIS | Microsoft HTTPAPI |
|---|---|---|
| LCP | 1.7 s | 1.8 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 700 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 Microsoft HTTPAPI
| Domain | When |
|---|---|
| jiasubet.cn | Aug 2025 |