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
94
194,280
Italy
66
120,089
Germany
71
109,223
United Kingdom
73
96,386
France
71
85,328
Netherlands
69
71,387
India
67
66,986
Canada
80
64,841
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | FirstImpression.io | Microsoft Advertising |
|---|---|---|
| LCP | 2 s | 1.9 s |
| INP | 100 ms | 75 ms |
| CLS | 0.05 | 0 |
| TTFB | 700 ms | 800 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.
All FirstImpression.io sites · All Microsoft Advertising sites