Today's Technology newsletters: Oct 21, 2026

Technology on Substack ranks Marcus on AI at 1 on October 21, 2026. Marcus on AI is new at rank 1 versus the prior board. This page lists the public top 10 newsletters only.

Substack Technology ranking for October 21

1. Marcus on AI

   Rank 1 in Technology on October 21, 2026.

2. SemiAnalysis

   Rank 2 in Technology on October 21, 2026.

3. P Equity Research

   Rank 3 in Technology on October 21, 2026.

4. Research Toolbox

   Rank 4 in Technology on October 21, 2026.

5. Rational Optimist Society

   Rank 5 in Technology on October 21, 2026.

6. Kyla’s Newsletter

   Rank 6 in Technology on October 21, 2026.

7. SEMIVISION @_@

   Rank 7 in Technology on October 21, 2026.

8. Effluvia

   Rank 8 in Technology on October 21, 2026.

9. Intentional Arrangement

   Rank 9 in Technology on October 21, 2026.

10. Computer, Enhance!

    Rank 10 in Technology on October 21, 2026.

The live ranked board beyond today's top 10 is available via the Trends MCP API. Get your free API key

How to pull this Substack Technology board

This list is the public top 10 from the Trends MCP API for Substack by Category, category Technology. Ranks past 10 stay in the API.

{
  "type": "Substack by Category",
  "category": "Technology",
  "limit": 10
}

See the Trends MCP data sources and every current category board.