Every resource founders actually use, in one library.

What founders use most, ranked by how many answers lean on it.

1. The single best thing ever written on customer conversations. It teaches you to ask about the customer's life and past... momtestbook.com Book · ~130 pages · Starting Up The Mom Test Rob Fitzpatrick In 212 answers
2. The permission slip to recruit users by hand, do things manually, and deliver 'insanely great' experiences to your first few... paulgraham.com Essay · ~15 min read · Starting Up Do Things That Don't Scale Paul Graham In 134 answers
3. Turns the vague feeling of product-market fit into a number you can move. Ask users how they would feel if they could no longer... First Round Review Article · ~20 min read · Starting Up How Superhuman Built an Engine to Find Product/Market Fit Rahul Vohra In 93 answers
4. The definitive essay on where good ideas come from: notice problems you personally have, don't force it. Use it as the lens for... paulgraham.com Essay · ~20 min read · Starting Up How to Get Startup Ideas Paul Graham In 89 answers
5. The essay that put 'product-market fit' into the startup vocabulary. Read it for the gut-level description of what PMF feels... pmarchive.com Essay · ~15 min read · Starting Up The Only Thing That Matters Marc Andreessen In 59 answers
6. The origin text for the modern MVP and validated-learning vocabulary every founder now uses. Read it for the mental model that... theleanstartup.com Book · ~330 pages · Starting Up The Lean Startup Eric Ries In 51 answers
7. A tactical follow-on covering the channels and motions top B2B startups scale after the first ten. Grounds distribution... Lenny's Newsletter Article · ~15 min read · Starting Up How to win your first 10 B2B customers Lenny Rachitsky In 45 answers
8. The best book on positioning against competitors by understanding the alternatives customers actually consider. Directly turns... aprildunford.com Book · ~200 pages · Starting Up Obviously Awesome: How to Nail Product Positioning so Customers Get It, Buy It, Love It April Dunford In 40 answers
9. The authoritative handbook on founder-led sales, written for technical/first-time sellers building B2B SaaS. Readable free... foundingsales.com Book · book (~400 pages) · Starting Up Founding Sales: The Early Stage Go-to-Market Handbook Peter Kazanjy In 37 answers
10. The cleanest distillation of the one framework that turns a customer chat into a relationship instead of a survey. The three... Sachin Rekhi's Blog Article · 10 min read · Starting Up A Primer on Talking to Customers From Rob Fitzpatrick's The Mom Test Sachin Rekhi In 32 answers
11. A short, practical field guide to customer discovery: who to talk to, how to find them, and how many. Pairs perfectly with The... talkingtohumans.com Book · ~80 pages (free PDF available) · Starting Up Talking to Humans Giff Constable In 30 answers
12. The best reminder that avoiding ruin beats chasing returns, and that wealth is the money you don't spend. The whole founder... The Psychology of Money Book · Wealth The Psychology of Money Morgan Housel In 29 answers
13. Basecamp's battle-tested, opinionated system for shipping meaningful work in fixed cycles without endless backlogs, a primary... Basecamp / 37signals Book · free online book · Starting Up Shape Up: Stop Running in Circles and Ship Work that Matters Ryan Singer In 27 answers
14. Altman's condensed operating manual for founders, including sharp guidance on focus, spending your time on what only you can... playbook.samaltman.com Article · long · Starting Up Startup Playbook Sam Altman In 24 answers
15. Entering an unfamiliar industry means you cannot see the walls and dead ends that veterans already know. Dixon explains that a... cdixon.org Essay · short read · Starting Up The Idea Maze Chris Dixon In 23 answers
16. A practical India-first reference for keeping personal and company finances (and their tax) cleanly separate. ClearTax Article · Wealth ClearTax: personal and business tax guides ClearTax In 23 answers
17. The India reference on short vs long term capital gains, holding periods, and rates for equity, funds, and property, so you... ClearTax Article · Wealth Capital gains tax in India ClearTax In 23 answers
18. When you have no budget, the worst move is to pour your limited time into a channel that was never going to work for your... Portfolio (Penguin Random House) Book · Starting Up Traction: How Any Startup Can Achieve Explosive Customer Growth Gabriel Weinberg and Justin Mares In 22 answers
19. The idea that started the lean movement, from the person who coined it. No business plan survives first contact with customers,... steveblank.com Article · ~8 min read · Starting Up Get Out of the Building Steve Blank In 22 answers
20. When your first ten will come from cold outreach, this guide gives you the full mechanics: building a target list, qualifying,... Close Article · Multi-chapter guide · Starting Up The Ultimate Startup Guide to Outbound Sales Steli Efti In 22 answers
21. Todd Jackson studied how dozens of now-large companies validated their very first idea. The pattern that repeats: deliver the... Lenny's Newsletter Article · ~15 min read · Starting Up How to Validate Your Startup Idea Todd Jackson In 21 answers
22. A step-by-step guide to running discovery when you have almost no data, aimed squarely at first-time founders. It is practical... First Round Review Article · 15 min read · Starting Up A Founder's Guide for Successful Early-Stage Customer Discovery Jeanette Mellinger In 21 answers
23. Free to read online, with chapters like "Build Less" and "Half, Not Half-Assed" that name your exact trap. It argues that... Basecamp / 37signals Book · Free online, ~4 hr · Starting Up Getting Real (free to read online) Jason Fried, David Heinemeier Hansson (37signals) In 21 answers
24. Thiel pushes you to look for ideas hidden in plain sight by asking what important truth very few people agree with you on. It... Peter Thiel and Blake Masters Book · About 220 pages · Starting Up Zero to One Peter Thiel and Blake Masters In 21 answers

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