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+
47
2
Open Page Rank 8+
689
8
Open Page Rank 7+
2,812
28
Open Page Rank 6+
5,269
56
Open Page Rank 5+
8,688
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
63,153
162
United Kingdom
28,394
47
Canada
28,277
59
India
21,189
56
France
20,122
31
Germany
20,086
29
Australia
18,205
34
Spain
17,003
27
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | AppNexus | SpotX |
|---|---|---|
| LCP | 1.9 s | 1.9 s |
| INP | 100 ms | 125 ms |
| CLS | 0.05 | 0.1 |
| TTFB | 800 ms | 400 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.
AppNexus to SpotX
| Domain | When |
|---|---|
| viterbochristmas.it | Sep 2025 |
SpotX to AppNexus
| Domain | When |
|---|---|
| viterbochristmas.it | Sep 2025 |