Apache Traffic Server vs IIS
Head-to-head usage across the sites we track.
Top sites by authority
Apache Traffic Server · IIS · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
4
50
Open Page Rank 8+
18
1,251
Open Page Rank 7+
31
4,874
Open Page Rank 6+
49
9,276
Open Page Rank 5+
73
15,469
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Apache Traffic Server · IIS · share of sites in each country using one or the other
United States
1,287
117,730
India
384
58,829
United Kingdom
351
42,820
Italy
221
40,808
Brazil
186
34,656
Canada
352
31,601
Germany
313
31,200
Türkiye
138
31,246
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Apache Traffic Server | IIS |
|---|---|---|
| LCP | 1.7 s | 1.7 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 800 ms | 700 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.