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
99
179,390
Italy
52
106,385
Germany
60
100,083
United Kingdom
62
87,382
France
57
73,584
Netherlands
56
63,866
India
55
59,833
Canada
69
57,630
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, Aug 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