Every resource founders actually use, in one library.

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

1. The canonical fake-door test, told by the founder who ran it. Buffer started as a two-page site: one page pitched the tool, a... Buffer Article · ~10 min read · Starting Up Idea to Paying Customers in 7 Weeks: How We Did It Joel Gascoigne In 19 answers
2. 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 19 answers
3. The CRED and Freecharge founder on building in India, including his line that Indian founders rush to solutions and underinvest... Lenny's Podcast Podcast · ~90 min · Starting Up Kunal Shah on winning in India, second-order thinking, and the philosophy of startups Kunal Shah (with Lenny Rachitsky) In 19 answers
4. 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 19 answers
5. The definitive talk that reframes launching from a one-shot event into a repeatable tactic, exactly this category's thesis. YC... YC Startup Library Video · ~25 min · Starting Up How to Launch (Again and Again) Kat Manalac (Y Combinator) In 18 answers
6. Patrick Campbell built ProfitWell on pricing data from thousands of companies, and this is the single best free deep-dive on... lennysnewsletter.com Article · long-form guide · Starting Up Pricing Your SaaS Product Patrick Campbell (ProfitWell), via Lenny's Newsletter In 18 answers
7. The Neon Show (formerly 100x Entrepreneur) is one of India's deepest founder-and-investor interview podcasts, covering pricing,... neon.fund Podcast · podcast series (200+ episodes) · Starting Up The Neon Show, Indian Founders on Pricing, Sales & Building Siddhartha Ahluwalia In 18 answers
8. A trusted India-first place to compare funds and think about where cash goes once you have some to invest. Value Research Tool · Wealth Value Research: fund research and planning Value Research In 18 answers
9. OpenAI's own table of Free, Go, Plus and Pro: what each includes, from GPT-6 chats and memory to voice, projects and deep... chatgpt.com Tool · How Founders Use AI ChatGPT Plans and Pricing OpenAI In 18 answers
10. Pete Koomen took Optimizely from zero to $100M+ ARR, and here he breaks the enterprise funnel down for exactly the person who... Y Combinator Startup School Video · ~35 min · Starting Up Enterprise Sales for Founders Pete Koomen In 17 answers
11. A calm explainer of what a secondary actually is, who has to approve it, and how the price gets set, before you raise it with... Carta Article · Wealth How secondary sales work at private companies Carta In 17 answers
12. A blunt, practical guide from Demand Curve's founder on which paid and organic channels fit which business, and why most... julian.com Article · Long-form guide · Starting Up Startup Handbook: Customer Acquisition Channels Julian Shapiro In 16 answers
13. From the founder of CMX and author of The Business of Belonging, a practical framework for deciding whether to build community... Lenny's Newsletter Article · ~25 min read · Starting Up A Founder's Guide to Community David Spinks In 16 answers
14. The most concrete guide to actually measuring what customers will pay, including survey methods and tier design. It turns... lennysnewsletter.com Article · long-form guide · Starting Up The Ultimate Guide to Willingness to Pay Lenny Rachitsky & Patrick Campbell In 16 answers
15. A punchy, contrarian classic on building a lean, sane, profitable company from the founders of Basecamp. It's the antidote to... 37signals Book · ~288 pages · Starting Up Rework Jason Fried & David Heinemeier Hansson In 16 answers
16. This is the essay that forces the honest question underneath your idea: are you building a growth company or a good small... Paul Graham Essay · ~20 min read · Starting Up Startup = Growth Paul Graham In 16 answers
17. Video · About 25 minutes · Starting Up How to Get Your First Customers (Startup School) Gustaf Alstromer In 16 answers
18. Savoia, who led early Google AdWords, argues most ideas fail because nobody wanted them, and teaches pretotyping: cheap... Alberto Savoia Book · ~250 pages · Starting Up The Right It: Why So Many Ideas Fail and How to Make Sure Yours Succeed Alberto Savoia In 16 answers
19. The FSSAI's current table of which food business needs which licence and what it costs a year, revised from 1 April 2026: most... foscos.fssai.gov.in Article · 9-page PDF · Starting Up FSSAI kind of business: eligibility criteria and fee structure (updated 1 April 2026) Food Safety and Standards Authority of India In 16 answers
20. The India-specific piece: perquisite tax at exercise, capital gains at sale, and the startup deferral, with worked examples in... ClearTax Article · Wealth How ESOPs are taxed in India ClearTax In 16 answers
21. Market size is meaningless until you know exactly who you're for, and Lenny turns that into a concrete, repeatable ICP exercise... Lenny's Newsletter Article · ~15 min read · Starting Up How to identify your ideal customer profile (ICP) Lenny Rachitsky In 15 answers
22. The most accessible, practical intro to usability ever written, you can read it in a weekend and immediately fix your product.... sensible.com Book · ~200 pages · Starting Up Don't Make Me Think, Revisited Steve Krug In 15 answers
23. The best free on-ramp for founders who feel 'too early' for a funded accelerator, it distils YC's thinking into a structured... Y Combinator Course · ~7-week self-paced course · Starting Up Startup School, Free Startup Course Y Combinator In 15 answers
24. Video · ~15 min · Starting Up How to Get and Test Startup Ideas Michael Seibel In 15 answers

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