Brian Balfour

Substacknewsletter · by Brian Balfour · English

I'm Brian Balfour. Founder/CEO of Reforge, Former VP Growth at HubSpot. I write free, deeply researched essays on AI, product, and growth strategy.

Investigate Sign in to visit
Audience
57K subscribers
Shown publicly on Substack
Publishing
No recent posts
Observed from indexed posts
Last post
Oct 2, 2025
Oct 2, 2025
Likely audience
Product managers
Inferred from post content

Brian Balfour is a Substack newsletter by Brian Balfour covering Product management, SaaS business models and AI growth strategy. Its most recent indexed post is from Oct 2, 2025. Shown publicly on Substack: 57K subscribers.

Topics

Recent posts

  • AI Growth…
  • The Four…
  • The new…
  • How Claude…
  • How To…

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 Brian Balfour

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 Brian Balfour.

  • Lenny's Newsletter1.2M subscribers

    SubstackEvery two weeks · last post 32 days ago

    Likely audience: Product managers

    1 shared topic

  • Product Growth241K subscribers

    SubstackWeekly · last post 16 days ago

    Likely audience: Product Managers

    1 shared topic

  • Marily’s AI Product Academy Newsletter207K subscribers

    SubstackEvery two weeks · last post 22 days ago

    Likely audience: Product managers

    1 shared topic

  • The Product Compass141K subscribers

    SubstackEvery two weeks · last post 19 days ago

    Likely audience: Startup founders

    1 shared topic

  • Supercompanies with Greg & Taylor140K subscribers

    SubstackEvery two weeks · last post 22 days ago

    Likely audience: Product managers

    1 shared topic

  • UX Collective134K subscribers

    SubstackEvery two weeks · last post 19 days ago

    Likely audience: Product managers

    1 shared topic

  • HelloPM's Substack103K subscribers

    Substacklast post Jul 8, 2026

    Likely audience: Product Managers

    1 shared topic

  • Products That Count75K subscribers

    SubstackSeveral times a week · last post 17 days ago

    Likely audience: Product managers

    1 shared topic

Compiled from public pages · refreshed Oct 13, 2026 · How NewsletterFIT collects and labels data