Express vs ZK
Head-to-head usage across the sites we track.
Top sites by authority
Express · ZK · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
63
0
Open Page Rank 8+
794
8
Open Page Rank 7+
2,329
27
Open Page Rank 6+
3,763
47
Open Page Rank 5+
5,743
66
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Express · ZK · share of sites in each country using one or the other
United States
41,639
161
India
25,247
86
United Kingdom
18,417
88
Germany
17,171
107
Brazil
16,922
111
France
15,941
86
Canada
15,658
82
Spain
13,005
92
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Express | ZK |
|---|---|---|
| LCP | 2.3 s | 2 s |
| INP | 100 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 800 ms | 600 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.