Best Market Sizing Newsletters in 2026

NewsletterFIT tracks 3 newsletters that cover Market sizing as a primary topic, 2 of them with posts in the last 90 days. By publicly shown subscriber count, the largest are Founder's GTM (1K) and La Neta del VC 🚀 (4K).

Updated Nov 7, 2026 · sorted by publicly shown subscribers · methodology

  1. 1
    Founder's GTM1K subscribers

    SubstackWeekly · last post 5 days ago

    From recent posts: This article details the second phase of a GTM build report for a marketing agency, focusing on market analysis and list construction for cold email campaigns. It emphasizes the critical importance of running mathematic…

    Likely audience: Marketing Agency Founders

  2. 2
    Founders Connect—

    SubstackMonthly or less · last post Aug 11, 2026

    We tell the stories of African / Black Founders, Creators, Operators and Investors. Goal is to document our history, people and impact and to inspire the next generation of builders.

    Likely audience: Venture capitalists and investors

  3. 3
    La Neta del VC 🚀4K subscribers

    Substacklast post Sep 18, 2024

    From recent posts: La Neta del VC 🚀 is a Spanish-language newsletter for Latin American entrepreneurs and founders, focusing on venture capital fundamentals, market sizing, and financial analysis. It publishes educational chapters…

    Likely audience: startup founders

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