Substack has become the home of some of the best writing on the internet. But with thousands of newsletters to choose from, finding the gems can be overwhelming. We've curated the best Substack newsletters across categories - and yes, they all work perfectly with InboxToKindle.

Technology & Startups

These newsletters keep you informed about the tech industry without the hype.

  • Stratechery by Ben Thompson - Deep analysis of tech strategy and business models
  • The Pragmatic Engineer by Gergely Orosz - Inside look at engineering culture at top tech companies
  • Lenny's Newsletter by Lenny Rachitsky - Product management insights from an ex-Airbnb PM
  • SemiAnalysis - Deep dives into semiconductors and AI hardware
  • Not Boring by Packy McCormick - Optimistic takes on business and technology

All of these newsletters can be delivered to your Kindle automatically with InboxToKindle. Subscribe using your inbox email and never miss an issue.

Business & Finance

Stay sharp on markets, economics, and business strategy.

  • The Diff by Byrne Hobart - Inflections in finance and technology
  • Net Interest by Marc Rubinstein - Deep dives into financial services
  • Kyla's Newsletter by Kyla Scanlon - Economics and markets explained clearly
  • The Generalist by Mario Gabriele - Deep dives into the world's most interesting companies
  • Money Stuff by Matt Levine (via Bloomberg) - The funniest and sharpest finance newsletter

Culture & Writing

The best long-form writing and cultural commentary on Substack.

  • The Honest Broker by Ted Gioia - Music, culture, and the creative life
  • Culture Study by Anne Helen Petersen - Deep dives into modern life and work
  • Garbage Day by Ryan Broderick - Internet culture and online trends
  • The Convivial Society by L.M. Sacasas - Technology and what it means to be human
  • Read Something Wonderful - A curated selection of the best writing on the internet

Science & Health

Evidence-based newsletters for curious minds.

  • Your Local Epidemiologist by Katelyn Jetelina - Public health updates you can trust
  • Uncharted Territories by Tomas Pueyo - Data-driven analysis of global trends
  • The Intrinsic Perspective by Erik Hoel - Neuroscience, consciousness, and AI
  • Ground Truths by Eric Topol - Medicine and health research from a top researcher
  • Astral Codex Ten by Scott Alexander - Rationality, psychiatry, and everything in between

Personal Growth & Productivity

Newsletters that help you think better and work smarter.

  • The Profile by Polina Marinova Pompliano - Profiles of the most successful people
  • 3-2-1 Thursday by James Clear - Quick wisdom on habits and decision-making
  • Brain Food by Shane Parrish (Farnam Street) - Mental models and decision-making
  • The Curiosity Chronicle by Sahil Bloom - Growth, learning, and life
  • Daily Stoic by Ryan Holiday - Ancient wisdom for modern life

How to Read All of These on Your Kindle

Reading these newsletters in email means competing with your inbox for attention. On Kindle, each newsletter gets the focus it deserves.

With InboxToKindle, you subscribe to any Substack using your unique inbox email address. Each new issue is automatically converted to EPUB and delivered to your Kindle. No manual forwarding, no format issues.

The free tier handles 15 deliveries per month - perfect if you're subscribed to a handful of must-reads. For heavier readers, unlimited delivery is $10/month.