AI existential risk newsletters

NewsletterFIT tracks 4 newsletters that cover AI existential risk as a primary topic, all with posts in the last 90 days. By publicly shown subscriber count, the largest are Metaculus (165K), Colligo (4K) and Exformation (2K).

Updated Oct 30, 2026 · sorted by publicly shown subscribers · methodology

  1. 1
    Metaculus 165K subscribers

    Substack Every two weeks · last post 21 days ago

    Likely audience: Policy makers

  2. 2
    Colligo 4K subscribers

    Substack Every two weeks · last post 31 days ago

    Likely audience: AI researchers

  3. 3
    Exformation 2K subscribers

    Substack Monthly or less · last post 29 days ago

    Likely audience: AI safety researchers

  4. 4
    The AI Philosopher 1K subscribers

    Substack Monthly or less · last post 45 days ago

    Likely audience: AI researchers and engineers

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