IoT security newsletters

NewsletterFIT tracks 7 newsletters that cover IoT security as a primary topic, all with posts in the last 90 days. By publicly shown subscriber count, the largest are UNSHADOWED (IAF) (10K), Dark Marc | Cybersecurity, Hacking & Tech (8K) and Cybersecurity Insights (8K).

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

  1. 1
    UNSHADOWED (IAF) 10K subscribers

    Substack Weekly · last post 17 days ago

    Likely audience: farmers

  2. 2
    Dark Marc | Cybersecurity, Hacking & Tech 8K subscribers

    Substack Every two weeks · last post 33 days ago

    Likely audience: AI security engineers

  3. 3
    Cybersecurity Insights 8K subscribers

    Substack Every two weeks · last post 14 days ago

    Likely audience: Cybersecurity professionals

  4. 4
    Proton 4K subscribers

    Substack Monthly or less · last post Aug 12, 2026

    Likely audience: Tech-savvy users

  5. 5
    Monde Numérique 3K subscribers

    Substack Every two weeks · last post 13 days ago

    Likely audience: IT Security Professionals

  6. 6
    the cyber brief. | Segura —

    LinkedIn Every two weeks · last post 14 days ago

    Likely audience: IT security professionals

  7. 7
    Commend News —

    LinkedIn Monthly or less · last post 7 days ago

    Likely audience: IT security professionals

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