Working notes from product people

Ask the people who’ve done it.

Q:
Answers quote and cite the source notes

01 — TopicsFourteen drawers, sorted.

3 more drawersBrowse all 14 topics →
Open drawer · 09

Startups & founders

288 notes · 89 people · 2005–2026
Lenny’s Newsletter · Free post♥ 571

How the biggest consumer apps got their first 1,000 users

May 12, 2020 · 22 min

“👉 Updated version of this post here 👈 Hello, and welcome to a free monthly edition of my newsletter. I’m Lenny, and each week I tackle reader questions about product, growth, working with humans, and anything else that’s stressing you out at the office. Send me your questions and in return, I’ll humbly offer actionable real-talk advice. 🤜🤛 If you find this post valuable, check out some of my other posts: 1. How To Know If You've…”

Lenny’s Podcast128 min

Inside ChatGPT: The fastest-growing product in history

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…
@hnshah · Hiten Shah on X♥ 28
Founders are doing product marketing earlier than they think. The market starts teaching you how buyers see the product almost immediately. What they compare it to affects the story you tell. Objections and lost deals often expose something deeper about the product itself. That
Lenny’s Podcast103 min

Lessons from 1,000+ YC startups: Resilience, tar pit ideas, pivoting, more

Dalton Caldwell · Apr 18, 2024
Key learnings
  • Keep the startup alive: the core mantra is 'don't die,' since much of startup success comes from persisting through near-death…
  • Before quitting, ask whether you still enjoy the work, your co-founders, and your customers; if you love those, lean toward…
  • A good pivot moves 'warmer,' toward domains you already know or have built experience in, and often grows out of what you learned…
@hnshah · Hiten Shah on X♥ 14
Founders are doing product marketing earlier than they think. It usually shows up when a buyer says something you weren’t expecting. That gap between how you describe the product and how buyers see it can change the story you tell and what gets built next. If you’re a founder

02 — FrameworksModels, annotated.

All frameworks →

03 — PeopleWho wrote the notes.

All 10 people →

04 — QuestionsAnswered from the notes.

All 32 questions →

Where notes come from

NewsletterLenny’s Newsletter106 free posts, with a longer excerpt.
Subscriber postsSummary only229 paid posts: our summary, at most two short quotes, and a link.
PodcastLenny’s Podcast322 episodes, each with 5–8 key learnings and timestamps.
EssaysSVPG · The Beautiful Mess499 essays from Marty Cagan and John Cutler.
Substack & blogsShreyas · Julie · Jason · Hiten577 essays and posts from independent writers.
XPosts on product58 posts, filtered for product relevance.