Every resource founders actually use, in one library.

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

1. What a REIT is, how it works in India, and why it gives property exposure with far more liquidity than a flat. ClearTax Article · Wealth REITs: real estate investing without buying property ClearTax In 5 answers
2. The written breakdown of the same case, with the operating model you can copy. lennysnewsletter.com Article · How Founders Use AI We replaced our sales team with 20 AI agents (essay version) Lenny Rachitsky In 5 answers
3. The most-cited definition of workflows vs agents, written by the team behind Claude. anthropic.com Guide · How Founders Use AI Building Effective AI Agents Anthropic In 5 answers
4. A user-research veteran's workflow that forces exact quotes and catches contradictions. lennysnewsletter.com Article · How Founders Use AI How to do AI analysis you can actually trust Caitlin Sullivan, Lenny's Newsletter In 5 answers
5. How to hand Claude a report or deck from any conversation and schedule it to run every week, with no builder at all. claude.com Article · How Founders Use AI Claude Cowork and chat are now one Claude Anthropic In 5 answers
6. Anthropic on letting Claude act in the browser without approving each step, with a safety classifier checking every action. claude.com Article · How Founders Use AI Claude in Chrome is generally available Anthropic In 5 answers
7. Microsoft's own post on Copilot in Excel's newest features: get data, clean data, skills you teach it once, and an interactive... techcommunity.microsoft.com Article · How Founders Use AI Beyond Analysis: Copilot Gets to Work in Excel Microsoft Excel team (Brian Jones) In 5 answers
8. Anthropic's comparison of Claude Free, Pro and Max, including memory, voice mode and the number of projects each plan allows. claude.com Tool · How Founders Use AI Plans & pricing | Claude Anthropic In 5 answers
9. A UX-research leader (ex-Uber Eats, BetterUp) gives founders a concrete three-step discovery process, including how to recruit... First Round Review Article · ~20 min read · Starting Up A founder-friendly playbook for early customer discovery First Round Review (Jeanette Mellinger) In 4 answers
10. A clear, operator-written guide from a respected SaaS-analytics company on defining and using an ICP to focus scarce startup... ChartMogul Blog Article · ~12 min read · Starting Up Without an ideal customer profile (ICP), your growth is just guesswork ChartMogul In 4 answers
11. One of the few pieces that clearly untangles ICP vs persona vs JTBD without jargon, so founders stop conflating them. Useful as... netretention.io Article · ~14 min read · Starting Up Ideal Customer Profiles (ICPs), ABM, JTBD and Personas: knowing your customer Net Retention In 4 answers
12. The most practitioner-friendly deep dive into JTBD, with interviews and case studies on applying it to real products. Free to... jtbd.info / alanklement.com Book · ~230 pages · Starting Up When Coffee and Kale Compete: Become great at making products people will buy Alan Klement In 4 answers
13. YC is the canonical authority on early-stage team formation, and this is their direct playbook for the exact problem a... YC Startup Library Article · ~12 min read · Starting Up How to Find a Technical Co-Founder Y Combinator In 4 answers
14. Paul Graham's short, opinionated take on naming from someone who has seen thousands of startups, canonical, no-fluff, and free. paulgraham.com Article · 8 min read · Starting Up Startup Names Paul Graham In 4 answers
15. Julian Shapiro's deeply practical framework for landing pages, including the desire-minus-friction conversion model, a... julian.com Article · 25 min read · Starting Up How to build a landing page (Startup Handbook) Julian Shapiro In 4 answers
16. When you want a more polished, professional-looking site that can grow into multiple pages, Framer's free tier and templates... framer.com Tool · Tool · Starting Up Framer, design-led website builder Framer In 4 answers
17. Harry Dry's core copywriting rules distilled with dozens of real examples, the fastest way to level up your writing from vague... Marketing Examples Article · 8 min read · Starting Up How to write copy that sells (three rules) Harry Dry In 4 answers
18. The definitive beginner walkthrough of finding and prioritising keywords, from the tool most SEOs actually use, authoritative... Ahrefs Article · 25 min read · Starting Up Keyword Research: The Beginner's Guide by Ahrefs Sam Oh (Ahrefs) In 4 answers
19. India's best long-form podcast with B2B SaaS founders who cracked global GTM from India, hosted by a 2x founder and Neon Fund... The Neon Show (formerly 100x Entrepreneur) Podcast · podcast series (200+ episodes) · Starting Up The Neon Show (Indian SaaS founders on GTM & sales) Siddhartha Ahluwalia In 4 answers
20. Based on studying 100+ consumer companies, Lenny shows that lasting growth comes from becoming world-class at one growth... Lenny's Newsletter Article · ~20 min read · Starting Up The Growth Engine: Kickstarting & Scaling a Consumer Business (Step 6) Lenny Rachitsky In 4 answers
21. Concrete retention benchmarks and cohort-analysis methods gathered from dozens of top companies, so you can tell a healthy... Lenny's Newsletter Article · ~20 min read · Starting Up How the Best Companies Measure and Improve Retention Lenny Rachitsky In 4 answers
22. The definitive framework for building products people return to without paid nudges, the Hook Model, backed by a million-plus... Portfolio / Penguin (nirandfar.com) Book · Book (~256 pages) · Starting Up Hooked: How to Build Habit-Forming Products Nir Eyal (with Ryan Hoover) In 4 answers
23. Battle-tested referral advice from the person who turned Airbnb's host referral program into its biggest driver of supply... Lenny's Newsletter Article · ~20 min read · Starting Up Building a Referrals Program Lenny Rachitsky In 4 answers
24. A primary-source, founder-written account of how India's largest and most profitable brokerage actually makes money and thinks... zerodha.com Article · blog post · Starting Up Z-Connect: Business Updates & Why We Do What We Do Nithin Kamath In 4 answers

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