The Best Substack Newsletters to Read in 2026
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 is hard. We picked ten that are consistently worth your time - and every one of them works with InboxToKindle, so you can read them distraction-free on your e-reader instead of buried in your inbox.
Quick Comparison
| Name | Best For | Price | |
|---|---|---|---|
| Stratechery | Tech strategy and business models | Free tier / $12/month | |
| Not Boring | Optimistic, big-picture business and tech writing | Free | |
| The Diff | Inflections in finance and technology | Free tier / paid | |
| Kyla's Newsletter | Economics and markets explained clearly | Free | |
| The Honest Broker | Music, culture, and the creative life | Free tier / $6/month | |
| Garbage Day | Internet culture and online trends | Free tier / $8/month | |
| Your Local Epidemiologist | Public health you can actually trust | Free tier / $5/month | |
| Astral Codex Ten | Rationality, psychiatry, and deep-dive essays | Free | |
| Lenny's Newsletter | Product management and growth | Free tier / $15/month | |
| 3-2-1 Thursday | Quick wisdom on habits and decisions | Free |
Detailed Reviews
1. Stratechery - Tech strategy and business models
Ben Thompson's daily/weekly analysis of the tech industry's biggest strategic moves. The gold standard for readers who want to understand why companies make the decisions they do, not just what happened.
Pros: Deep, well-reasoned analysis, Long-form pieces that read great on Kindle, Consistent publishing schedule
Cons: Full archive and daily updates require a paid plan
Price: Free tier / $12/month
2. Not Boring - Optimistic, big-picture business and tech writing
Packy McCormick's essays connect business, technology, and culture with an upbeat, ambitious tone that's a nice counterweight to more cynical tech coverage.
Pros: Engaging, accessible writing, Weekly essay format fits a single Kindle sitting, Free
Cons: Broad focus means less depth on any one topic
Price: Free
3. The Diff - Inflections in finance and technology
Byrne Hobart digs into the specific moments where finance, technology, and business strategy bend - dense, well-sourced, and rewarding for readers who want more than headlines.
Pros: Rigorous, original analysis, Covers finance and tech from a unique angle, Great long-form Kindle read
Cons: Denser than most newsletters - not a quick skim
Price: Free tier / paid
4. Kyla's Newsletter - Economics and markets explained clearly
Kyla Scanlon breaks down macroeconomics and market trends in plain language, aimed at readers who want to actually understand what's happening rather than just react to headlines.
Pros: Clear, jargon-free explanations, Timely coverage of market trends, Free
Cons: Lighter on historical/technical depth than specialist newsletters
Price: Free
5. The Honest Broker - Music, culture, and the creative life
Ted Gioia writes about music history, the economics of creative work, and culture with more depth than most cultural criticism you'll find online.
Pros: Distinctive voice and deep subject knowledge, Long-form essays suited to e-ink reading
Cons: Some series/deep-dives are paid-only
Price: Free tier / $6/month
6. Garbage Day - Internet culture and online trends
Ryan Broderick tracks how memes, platforms, and online subcultures actually spread - essential if you want to understand internet culture instead of just scrolling through it.
Pros: Sharp, funny writing, Explains trends other outlets miss, Frequent updates
Cons: Best posts are behind a paid tier
Price: Free tier / $8/month
7. Your Local Epidemiologist - Public health you can actually trust
Katelyn Jetelina translates public health research and data into clear, non-alarmist updates - one of the most trusted health newsletters on Substack.
Pros: Evidence-based, well-cited, Calm, practical tone, Regular publishing schedule
Cons: Some in-depth explainers are paid-only
Price: Free tier / $5/month
8. Astral Codex Ten - Rationality, psychiatry, and deep-dive essays
Scott Alexander writes long, thoroughly researched essays spanning psychiatry, philosophy, and social science - the kind of writing that benefits from Kindle's distraction-free reading.
Pros: Extremely thorough, well-argued essays, Ideal length and depth for Kindle reading, Free
Cons: Essays can run very long
Price: Free
9. Lenny's Newsletter - Product management and growth
Lenny Rachitsky (ex-Airbnb PM) shares practical, actionable advice on product management, growth, and career development, often via expert interviews.
Pros: Practical, applicable advice, High-quality interviews with industry leaders
Cons: Full archive requires a paid subscription
Price: Free tier / $15/month
10. 3-2-1 Thursday - Quick wisdom on habits and decisions
James Clear's weekly newsletter distills ideas on habits, decision-making, and personal growth into a short, high-signal read - a nice contrast to the longer essays on this list.
Pros: Short, high-signal format, Consistent weekly delivery, Free
Cons: Less depth than the long-form newsletters on this list
Price: Free
How to Choose
Want deep, long-form analysis?
- Stratechery, The Diff, and Astral Codex Ten reward readers who want depth over speed
- These read best on Kindle in a single, focused sitting
Want something shorter and free?
- Not Boring, Kyla's Newsletter, Astral Codex Ten, and 3-2-1 Thursday are free and easier to read in one sitting
Frequently Asked Questions
Are all of these newsletters available for free?
Most offer a free tier. Stratechery, Lenny's Newsletter, The Honest Broker, Garbage Day, and Your Local Epidemiologist have paid tiers for their deepest content, but all publish free posts regularly.
How do I read these on my Kindle instead of email?
Sign up for InboxToKindle and get your unique inbox email address, then subscribe to each newsletter using that address instead of your personal email. Every issue is converted to EPUB and delivered to your Kindle automatically.
Does this work with paid Substack subscriptions?
Yes. Subscribe to the paid newsletter with your InboxToKindle inbox email and complete checkout as usual - paid issues arrive on your Kindle exactly like free ones.
How often is this list updated?
We review and refresh this list periodically to reflect newsletters that are still consistently publishing high-quality work.