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+
68
0
Open Page Rank 8+
823
8
Open Page Rank 7+
2,351
26
Open Page Rank 6+
3,815
45
Open Page Rank 5+
5,791
65
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
38,356
155
India
23,670
77
United Kingdom
16,760
84
Brazil
15,957
95
Germany
15,250
97
France
14,018
69
Canada
13,841
69
Spain
11,544
77
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Express | ZK |
|---|---|---|
| LCP | 2.2 s | 1.9 s |
| INP | 100 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 800 ms | 700 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.