AppNexus vs SpotX
Head-to-head usage across the sites we track.
Top sites by authority
AppNexus · SpotX · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
41
2
Open Page Rank 8+
670
8
Open Page Rank 7+
2,747
28
Open Page Rank 6+
5,157
56
Open Page Rank 5+
8,426
77
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
AppNexus · SpotX · share of sites in each country using one or the other
United States
55,306
145
United Kingdom
25,318
46
Canada
24,555
61
India
18,466
50
Germany
18,026
27
France
17,057
23
Australia
16,016
29
Spain
15,020
25
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | AppNexus | SpotX |
|---|---|---|
| LCP | 1.9 s | 1.7 s |
| INP | 100 ms | 100 ms |
| CLS | 0.05 | 0.1 |
| TTFB | 800 ms | 400 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.
AppNexus to SpotX
| Domain | When |
|---|---|
| viterbochristmas.it | Sep 2025 |
SpotX to AppNexus
| Domain | When |
|---|---|
| viterbochristmas.it | Sep 2025 |