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+
43
1
Open Page Rank 8+
646
6
Open Page Rank 7+
2,645
26
Open Page Rank 6+
4,923
54
Open Page Rank 5+
7,930
75
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
53,163
145
United Kingdom
24,886
43
Canada
24,461
57
India
18,232
45
Germany
17,552
27
France
16,584
24
Australia
15,760
28
Spain
15,151
24
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 | 125 ms |
| CLS | 0.05 | 0.1 |
| TTFB | 800 ms | 400 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.