Customer Discovery newsletters

NewsletterFIT tracks 6 newsletters that cover Customer Discovery as a primary topic, 5 of them with posts in the last 90 days. By publicly shown subscriber count, the largest are Steve Blank (26K), Product Driven Newsletter (16K) and SellingtoDefense (14K).

Updated Oct 29, 2026 · sorted by publicly shown subscribers · methodology

  1. 1
    Steve Blank 26K subscribers

    Substack Monthly or less · last post 29 days ago

    Likely audience: Startup founders

  2. 2
    Product Driven Newsletter 16K subscribers

    Substack last post Jun 23, 2026

    Likely audience: Product managers

  3. 3
    SellingtoDefense 14K subscribers

    Substack Monthly or less · last post 49 days ago

    Likely audience: Startup founders

  4. 4
    Mahmoud Omar 8K subscribers

    Substack Monthly or less · last post 17 days ago

    Likely audience: Entrepreneurs

  5. 5
    The Physics of Startups 7K subscribers

    Substack Weekly · last post 20 days ago

    Likely audience: Product managers

  6. 6
    Joca’s Substack 4K subscribers

    Substack Every two weeks · last post 34 days ago

    Likely audience: Product Managers

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