critical infrastructure newsletters

NewsletterFIT tracks 4 newsletters that cover critical infrastructure as a primary topic, 2 of them with posts in the last 90 days. By publicly shown subscriber count, the largest are Cyber News Network (7K), Calif Newsletter (4K) and !!! Do not subscribe! We have moved!! (14K).

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

  1. 1
    Cyber News Network 7K subscribers

    Substack Several times a week · last post 17 days ago

    Likely audience: Cybersecurity analysts

  2. 2
    Calif Newsletter 4K subscribers

    Substack Every two weeks · last post 48 days ago

    Likely audience: Cybersecurity professionals

  3. 3
    !!! Do not subscribe! We have moved!! 14K subscribers

    Substack last post Feb 8, 2024

    Likely audience: Cybersecurity professionals

  4. 4
    pwn the future 3K subscribers

    Substack last post Apr 1, 2025

    Likely audience: Cybersecurity professionals

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