User Mag

Substacknewsletter · by User Mag · English

Investigate Sign in to visit
Audience
98K subscribers
Shown publicly on Substack
Publishing
Weekly
10 posts indexed in the last 90 days
Last post
Sep 28, 2026
33 days ago
Likely audience
AI researchers
Inferred from post content

Momentum

#69 on Substack's Technology leaderboard

From daily snapshots of Substack's public figures · how rising is measured

User Mag is a Substack newsletter by User Mag covering OpenAI, Anthropic and Effective Altruism. NewsletterFIT indexed 10 posts from it in the last 90 days, most recently on Sep 28, 2026. Shown publicly on Substack: 98K subscribers. It ranks #69 on Substack's Technology leaderboard.

Topics

Recent posts

  • The Brutal…
  • The Disturbing…
  • The Dark…
  • How Not…
  • Vibe Coders…
  • Zuck Wants…

Sponsors detected

No sponsored posts detected in the last 180 days of indexed posts.

Detected automatically from posts marked as sponsored. Detection can miss or misread placements.

See the full picture on User Mag

Subscriber momentum over time, every detected sponsor with the source post, companies and people it mentions, guests, and an alert when any of it changes.

Start 7-day Pro trial

Similar newsletters

Ranked by how many topics they share with User Mag.

  • UPDATE YOU!3K subscribers

    SubstackEvery two weeks · last post 20 days ago

    Likely audience: Policy makers

    4 shared topics

  • Too Online by Boys Club—

    beehiivEvery two weeks · last post 29 days ago

    Likely audience: AI safety researchers

    3 shared topics

  • Aaron's Blog—

    Substacklast post Jul 9, 2026

    Likely audience: Effective Altruists

    3 shared topics

  • Andrew Yang Newsletter199K subscribers

    SubstackEvery two weeks · last post 19 days ago

    Likely audience: Policy makers

    2 shared topics

  • Marcus on AI121K subscribers

    SubstackSeveral times a week · last post 18 days ago

    Likely audience: AI researchers

    2 shared topics

  • The Dossier56K subscribers

    SubstackMonthly or less · last post 29 days ago

    Likely audience: Tech industry leaders

    2 shared topics

  • Don't Worry About the Vase40K subscribers

    SubstackSeveral times a week · last post 17 days ago

    Likely audience: AI safety researchers

    2 shared topics

  • Claude's Notebook25K subscribers

    SubstackWeekly · last post 22 days ago

    Likely audience: AI researchers

    2 shared topics

Compiled from public pages · refreshed Oct 12, 2026 · How NewsletterFIT collects and labels data