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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. Maps the academic-grade research stack for founders in health, deeptech or regulated spaces. iatrox.com Article · How Founders Use AI Best AI tools for evidence research: Elicit, Consensus, Semantic Scholar, Perplexity, scite iatrox
  2. Video · How Founders Use AI How To Use Perplexity AI (Best AI Research Tool) YouTube tutorial
  3. The free reference 3M+ people learned from, covering zero-shot to ReAct with examples. promptingguide.ai Guide · How Founders Use AI Prompt Engineering Guide (promptingguide.ai) DAIR.AI
  4. The underlying repo with papers, notebooks and lessons for going deeper. github.com Tool · How Founders Use AI dair-ai/Prompt-Engineering-Guide (GitHub) DAIR.AI
  5. A self-paced course version if you prefer structure over docs. academy.dair.ai Course · How Founders Use AI Introduction to Prompt Engineering (DAIR Academy) DAIR.AI
  6. Google's persona-task-context-format formula with role-specific examples; effective prompts average 21 words. services.google.com Guide · How Founders Use AI Gemini for Google Workspace Prompting Guide (handbook) Google
  7. The interactive version of the handbook, organised by job and use case. workspace.google.com Guide · How Founders Use AI Google Workspace with Gemini Prompt Guide Google Workspace
  8. A two-minute read of prompting basics to share with non-technical teammates. support.google.com Guide · How Founders Use AI Tips to write prompts for Gemini Google
  9. Names the 8 components of a research prompt including guardrails and anti-hallucination clauses. findskill.ai Guide · How Founders Use AI Deep Research Prompt Framework FindSkill.ai
  10. A copy-paste template that turns a fuzzy founder question into an analyst brief. armenberenson.com Guide · How Founders Use AI Deep Research Prompt Template Armen Berenson
  11. The meta-prompting trick: have the model interview you before it researches. linkedin.com Article · How Founders Use AI ChatGPT Deep Research: Prompts inside prompts Seth Wylie
  12. Worked examples of weak vs strong research prompts with the outputs compared. medium.com Article · How Founders Use AI Unlock ChatGPT's Research Superpowers: Guide to Deep Research Prompts Ali Azimi Darmian
  13. OpenAI's own training material on briefing the research agent properly. academy.openai.com Course · How Founders Use AI Deep research (OpenAI Academy resource) OpenAI Academy
  14. An educator's battle-tested prompt patterns for rigorous, citable research output. teachingnaked.com Guide · How Founders Use AI Deep Research Prompts José Bowen (Teaching Naked)
  15. Shows how a standing system prompt about you and your company upgrades every future research answer. lennysnewsletter.com Article · How Founders Use AI Build your personal AI copilot Tal Raviv, Lenny's Newsletter
  16. A gentle training plan that builds daily prompting muscle instead of one-off hacks. lennysnewsletter.com Article · How Founders Use AI Your Couch-to-5K for AI Hilary Gridley, Lenny's Newsletter
  17. Prompting techniques specifically aimed at getting fewer made-up answers. mediacenter.ibm.com Video · How Founders Use AI Tuning Your AI Model to Reduce Hallucinations IBM
  18. The key instruction: build TAM/SAM/SOM bottom-up from buyer constraints, not analyst headlines. saas-hackers.com Guide · How Founders Use AI How do you use ChatGPT Deep Research for market sizing? SaaS Hackers
  19. A forensic case study of how AI overshot a market by $33B, and how to catch it. strategex.com Article · How Founders Use AI When AI Gets Market Sizing Wrong: A $33 Billion Reality Check Strategex
  20. Tests both agents on actual business-plan research so you see the output quality gap. liveplan.com Article · How Founders Use AI I Tried ChatGPT and Google Gemini's Deep Research (for business planning) LivePlan
  21. A professional B2B market researcher grades AI reports against industry standards. cascadeinsights.com Article · How Founders Use AI A Market Researcher's Review: Deep Research with ChatGPT vs. Gemini Cascade Insights
  22. Five sharp prompts that stress-test demand before you build anything. forbes.com Article · How Founders Use AI 5 ChatGPT Prompts To Check If Your Business Idea Is Worth Millions Jodie Cook, Forbes
  23. A builder's literal prompt stack for demand, competition and willingness-to-pay checks. medium.com Article · How Founders Use AI The Exact Prompts I Use to Validate New Business Ideas Talha Malik
  24. Video · How Founders Use AI How to Do a Market Research With AI YouTube tutorial

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The hubs

Starting Up Find an idea, validate it, build, and land your first customers. 1046 questions GTM Go-to-market, from breaking in to how the best teams do it. 352 questions D2C Building a direct-to-consumer brand, India-first. 482 questions Wealth Paying yourself, ESOPs, secondaries, and de-risking founder wealth. 154 questions How Founders Use AI How founders actually put AI to work, mapped topic by topic. 278 questions Glossary Plain-language definitions of the startup and VC terms you'll hit. 390 terms
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