Lenny’s Podcast74 min
Crystal W · Jul 31, 2022
Key learnings- Run Wizard of Oz style experiments before building: use WhatsApp groups, screenshots, or manual processes to validate demand…
- Experiments are worth running even with around 30 users; the trends stay similar, and precision improves with more data, while…
- Define retention concretely as cohort retention; for a free weekly product, expect roughly 60% of the prior week's users to…
Lenny’s Newsletter♥ 27
Apr 13, 2021 · 16 min
Subscriber post — summary onlyLenny Rachitsky explains why marketplaces fail, drawing on dozens of failed examples. He argues the core causes mirror any startup: lacking product-market fit on demand or supply, poor liquidity, weak unit economics…
Lenny’s Podcast128 min
Sarah Tavel · Dec 27, 2023
Key learnings- Pick one core action that defines an engaged user and track it as your North Star, rather than vanity metrics like MAUs or…
- Build the product so it gets better the more it is used and users have more to lose by leaving, which drives retention.
- Design network effects and re-engagement loops so that each user's activity pulls in and re-activates others without extra effort.
Lenny’s Newsletter♥ 274
Feb 11, 2025 · 15 min
Subscriber post — summary onlyA data-driven deep dive into Y Combinator's roughly 4,900 companies, examining survival, exits, unicorn rates, funding, geography, and founder traits. The core argument is that YC's edge lies in picking strong founders…
Lenny’s Podcast136 min
Eric Ries, Lean Startup author · May 10, 2026
Key learnings- Protect your company's mission structurally from day one; waiting for success or later fundraises makes these protections…
- Check your own corporate charter and governance documents, since most founders never read them and may have signed away mission…
- Consider filing as a public benefit corporation with a specific purpose statement; it's a simple filing that defends against…
SVPG · Marty CaganJun 1, 2010
Jun 1, 2010 · 3 min
Marty Cagan introduces four thought leaders whose blogs he finds valuable for product people, many of whom were relatively new voices in 2010. He profiles Ben Horowitz, Eric Ries, Steve Blank, and Fred Wilson…
Lenny’s Podcast65 min
Hamilton Helmer · May 5, 2024
Key learnings- Start thinking about strategy and power even before product-market fit, focusing on the underlying characteristics that might…
- A real power needs both a benefit (cost or price advantage) and a barrier that competitors cannot easily mimic; Helmer calls this…
- Early-stage startups should prioritize counter positioning, then consider network economies, scale economies, and switching costs…
SVPG · Marty CaganJan 26, 2014
Jan 26, 2014 · 3 min
Marty Cagan argues that a startup's central goal is reaching Product-Market Fit, the point where a product has proven demand and justifies investing in sales, marketing and scale. He standardizes on Marc Andreessen's…
Lenny’s Podcast89 min
Michael Truell · May 1, 2025
Key learnings- Build the product you and your team actually use every day (dogfooding) so you never ship anything that isn't genuinely useful…
- When working with AI coding tools, chop tasks into small specify-generate-review loops rather than handing over one giant…
- Spend time on side projects deliberately pushing AI to its limits to build a calibrated gut feeling for what current models can…
Lenny’s Newsletter♥ 97
Aug 9, 2022 · 43 min
Subscriber post — summary onlyPart five of a six-part series on building a consumer business, focused on retention and finding product-market fit. The post argues PMF is a spectrum of confidence, signaled by flattening retention curves, organic…
Lenny’s Podcast99 min
Gergely · Nov 17, 2022
Key learnings- Build real depth in a specific field before writing about it, since credibility from hands-on experience is hard to fake and…
- Set controllable goals, such as publishing on a fixed cadence, rather than outcome goals like subscriber counts you cannot…
- Create external deadlines and accountability, such as promises to paying readers or a publisher, to overcome the procrastination…
Lenny’s Newsletter♥ 466
Jul 15, 2025 · 12 min
Subscriber post — summary onlyLenny Rachitsky shares seven older essays he considers timeless and formative for product builders, including pieces on delegation, agency, taste, learning, product focus, market vs. team, and Elon Musk's approach. He…
Lenny’s Podcast103 min
Geoffrey Moore · Jan 25, 2024
Key learnings- Don't take any customer you can find to generate revenue; instead concentrate on one narrow beachhead segment defined by…
- Pick a beachhead big enough to matter but small enough to lead, where you could plausibly reach 30 to 50 percent share within a…
- Win a marquee customer whose name people recognize, but make sure the reference that pragmatists trust is a pragmatist peer, not…
Lenny’s Newsletter♥ 182
Dec 24, 2024 · 11 min
Subscriber post — summary onlyLenny Rachitsky, working with Crunchbase data, ranks the most active and most successful U.S. angel investors across several time windows. The post is a directional guide to who early-stage founders might approach, and…
Lenny’s Podcast79 min
Julian Shapiro · Sep 25, 2022
Key learnings- Pursue product-led acquisition by designing features where users naturally invite others, such as settling debts, sharing…
- Build user state, like reputation, audience, or social graphs that cannot transfer off-platform, so accumulated investment makes…
- Prefer evergreen topics and keep updating old writing, since Julian treats his handbooks and posts as living assets rather than…
Lenny’s Podcast105 min
Keith Rabois · Apr 12, 2026
Key learnings- Build the team first: Rabois argues the team you assemble determines the company you build, so hiring quality outranks market…
- Check hires 30 days after they join by asking whether you would make the same decision again; he says this short loop predicts…
- Run ruthless referencing with many references per senior hire, and frame questions around whether the person can be a world-class…
producthabits.com · Hiten ShahNov 25, 2018
Nov 25, 2018 · 20 min
“Competition is intense for startups in every industry, but there are few industries harder to crack than media. With an already intimidating array of major media conglomerates competing for audiences’… Keep reading The post How theSkimm Grew to 7 Million Subscribers in 7 Years appeared first on Product Habits.”
Lenny’s Podcast128 min
Nick Turley · Aug 9, 2025
Key learnings- Ship early to learn what people actually want; with AI, the valuable behaviors are emergent, so you won't know what to polish…
- Treat the model itself as a product: iterate on it using real user use cases, personality/vibe checks, and new capabilities like…
- Set the team's pace deliberately by asking whether work is 'maximally accelerated', separating fast product iteration from…
Lenny’s Podcast115 min
Eric Simons · Mar 13, 2025
Key learnings- Eric Simons says deep technology bets can take years to find their market; his team stayed alive by bootstrapping and keeping…
- Simons advises treating spending as a default no until you see real customer pull, and buying software with the goal of cutting…
- Simons notes that when a launch unexpectedly takes off, pricing and infrastructure often break first; Bolt rolled out upgrade…
HEY World · Jason FriedSep 25, 2025
Sep 25, 2025
Jason Fried responds to a young entrepreneur in his mid-20s who sold a business and now holds a couple million dollars in liquid cash, asking whether to invest it, start a new company, or do something else. Fried's…
Lenny’s Podcast79 min
Anton Osika · Mar 9, 2025
Key learnings- Be precise and explicit when prompting an AI builder: say exactly what you expect and which parts are not working, rather than…
- Use the agent's chat mode to ask how something works or why it isn't doing what you want; this builds understanding while you…
- Expect to spend a full week taking one real problem from idea to a working product that people use; Anton suggests that alone…
SVPG · Marty CaganMay 6, 2010
May 6, 2010 · 4 min
Marty Cagan describes a shared workspace he helped create in Silicon Valley for very early-stage startups, which often struggle with the time and money needed to set up an office. The space offers flexible…
Lenny’s Podcast112 min
Ravi Mehta · Sep 29, 2025
Key learnings- Startups win on latency, the speed from idea to validated result, not raw velocity; design tests so you can learn in days rather…
- Early-stage companies lack the traffic for statistically significant experiments, so favor conviction built from enough data over…
- Build an early-stage network of founders, angels, and builders early, since large-company connections often prefer staying in…
Lenny’s Podcast98 min
Brian Halligan · Feb 15, 2026
Key learnings- Overrate less your gut feeling in interviews; rely on blind references and ask pointed questions like how likely you would be to…
- Prefer spiky candidates with visible weaknesses who will challenge you over polished candidates with the fewest weaknesses, and…
- Be cautious hiring executives straight from big companies; they often have mismatched expectations and high attrition in scaling…