FirstImpression.io vs Microsoft Advertising
Head-to-head usage across the sites we track.
Top sites by authority
FirstImpression.io · Microsoft Advertising · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
FirstImpression.io · Microsoft Advertising · share of sites in each country using one or the other
United States
103
180,700
Italy
55
113,422
Germany
59
98,787
United Kingdom
61
87,840
France
55
76,969
Netherlands
52
64,450
India
55
59,005
Spain
79
58,253
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | FirstImpression.io | Microsoft Advertising |
|---|---|---|
| LCP | 2.1 s | 1.9 s |
| INP | 175 ms | 75 ms |
| CLS | 0.05 | 0 |
| TTFB | 700 ms | 800 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.
All FirstImpression.io sites · All Microsoft Advertising sites