AppNexus vs Sizmek
Head-to-head usage across the sites we track.
Top sites by authority
AppNexus · Sizmek · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
47
6
Open Page Rank 8+
689
31
Open Page Rank 7+
2,812
98
Open Page Rank 6+
5,269
162
Open Page Rank 5+
8,688
259
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
AppNexus · Sizmek · share of sites in each country using one or the other
United States
63,153
4,118
United Kingdom
28,394
1,182
Canada
28,277
1,218
India
21,189
1,222
France
20,122
951
Germany
20,086
933
Australia
18,205
1,034
Spain
17,003
900
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | AppNexus | Sizmek |
|---|---|---|
| LCP | 1.9 s | 2.2 s |
| INP | 100 ms | 150 ms |
| CLS | 0.05 | 0.1 |
| TTFB | 800 ms | 900 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 Sizmek
| Domain | When |
|---|---|
| speckcdjr.com | Mar 2026 |
| lawless.com | Jul 2025 |
Sizmek to AppNexus
| Domain | When |
|---|---|
| speckcdjr.com | Mar 2026 |