Substack vs Zinnia
Head-to-head usage across the sites we track.
Top sites by authority
Substack · Zinnia · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
3
0
Open Page Rank 8+
14
0
Open Page Rank 7+
60
0
Open Page Rank 6+
137
0
Open Page Rank 5+
226
0
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Substack · Zinnia · share of sites in each country using one or the other
United States
2,725
3
United Kingdom
862
1
India
805
1
Canada
669
1
Australia
369
1
Spain
336
1
Germany
332
1
Brazil
314
1
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Substack | Zinnia |
|---|---|---|
| LCP | 1.9 s | 1.8 s |
| INP | 75 ms | 125 ms |
| CLS | 0 | 0.13 |
| TTFB | 500 ms | 1000 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.