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Every resource founders actually use, in one library.

The essays, videos, podcasts, books and tools behind every answer across eChai's hubs, from starting up to go-to-market, D2C, founder money and AI, each with a note on why it is here.

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

  1. Video · ~20 min · Starting Up Customer Discovery: What Do You Ask Justin Wilcox In 3 answers
  2. A DTC media buyer who has spent millions pushing the 'creative is the strategy' view, watch him break down real winning and... YouTube Video · D2C Nick Theriot (YouTube Channel) Nick Theriot In 3 answers
  3. Video · D2C How to Register a Private Limited Company in India (Step-by-Step Guide 2025) YouTube In 3 answers
  4. Video · 45 min watch · GTM How to Build a Tech Partner Program That Works Cloud Software Association In 3 answers
  5. What changes in your story when a developer loved product has to be sold to a CIO who has never heard of you. Directly relevant... Heavybit Video · 35 min · GTM Moving into the Enterprise: Fireside with Postman's Founder and CEO Adam Gross with Abhinav Asthana In 3 answers
  6. Video · How Founders Use AI Andrej Karpathy: Software Is Changing (Again) Y Combinator / Andrej Karpathy In 3 answers
  7. Video · How Founders Use AI Pieter Levels: Programming, Viral AI Startups | Lex Fridman #440 Lex Fridman In 3 answers
  8. Video · How Founders Use AI How To Build A Company With AI From The Ground Up Y Combinator (Diana Hu) In 3 answers
  9. Video · How Founders Use AI I Ranked Every AI App Builder for 2026: Lovable vs Bolt vs Replit vs Cursor Build Great Products In 3 answers
  10. The episode that defined the category thesis; 300 potential billion-dollar companies. ycombinator.com Video · How Founders Use AI Vertical AI Agents Could Be 10X Bigger Than SaaS Y Combinator Lightcone (Garry Tan, Jared Friedman, Harj Taggar, Diana Hu) In 3 answers
  11. Video · How Founders Use AI The Founder Who Automated Content Creation Using AI (Varun Mayya) Bad Decisions Podcast In 3 answers
  12. Video · How Founders Use AI Founder-Led Sales for Y Combinator Demo Day (Sam Blond) Sam Blond (ex-CRO Brex) In 3 answers
  13. A widely followed Indian founder-educator (ex-CEO Groupon India / nearbuy) who speaks directly to the Indian salaried... ankurwarikoo.com Video · Short-form video series · Starting Up Ankur Warikoo, Entrepreneurship Ankur Warikoo In 2 answers
  14. A seasoned enterprise sales leader gives a crash course on selling into complex organizations like the Fortune 500, including... Andreessen Horowitz (a16z) Video · ~45 min · Starting Up Go-to-Market Boot Camp for Startups: Field Sales Mark Cranney In 2 answers
  15. Video · About 3 minutes · Starting Up Steve Blank: Want Your Startup to Succeed? Get Out of the Building Steve Blank (Inc. Magazine) In 2 answers
  16. Video · About 95 minutes (North Star segment near 1:19:21) · Starting Up The original growth hacker reveals his secrets | Sean Ellis (author of "Hacking Growth") Sean Ellis, interviewed by Lenny Rachitsky In 2 answers
  17. Video · About 30 minutes · Starting Up How to Get Users and Grow Gustaf Alstromer In 2 answers
  18. Video · ~15 min · Starting Up How to CRUSH Facebook Ads with a Small Budget in 2026 Ben Heath In 2 answers
  19. Video · Starting Up How I use AI to save 10+ hours per week Ali Abdaal In 2 answers
  20. Video · about 1 hour · Starting Up Mastering onboarding | Lauryn Isford (Head of Growth at Airtable) Lenny Rachitsky and Lauryn Isford In 2 answers
  21. YC's David Lieb walks through cohort retention: watching each week's new users and asking how many actually come back. For a... Y Combinator Startup School Video · ~20 min · Starting Up How To Improve Cohort Retention David Lieb In 2 answers
  22. Video · about 22 minutes · Starting Up Consumer Startup Metrics | Startup School Tom Blomfield In 2 answers
  23. YC is openly skeptical of a remote co-founder (they discount the plan if a linchpin is distant), which makes this the most... Y Combinator Video · 35 min · Starting Up Best Practices for Managing a Remote Team Y Combinator In 2 answers
  24. Video · ~10 min · Starting Up Product-market fit with Michael Seibel Michael Seibel In 2 answers

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