Top Substack newsletters today: September 21, 2026
Josh Appelbaum leads 10 Substack newsletters on September 21, 2026. Hyperaware publishes the free-tier cut (top 10, delayed about 24 hours). 4 of the published top 10 are new versus the prior day; 6 hold over by exact title.
Top 10 Substack newsletters
1
Josh Appelbaum
2
Signal, Not Noise! By AJ Signal
3
The Sweep With Tom Pelissero
4
Intentional Luxury Bish
5
Vanessa's Stitch Club
6
Jingles Labs
7
Seedy19 | Biotech Investing
8
Shield of the Republic
9
RiffPost
10
TriziaZu STORIES
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These ranks are the Hyperaware free snapshot for September 21, 2026: top 10 only, delayed about 24 hours. Agents can pull the same board with a free API key, or go Pro for live full-depth ranks.