Explore · The library

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. A startup operator runs the same $5M ARR brief through both tools and shows the raw outputs. gregisenberg.com Article · How Founders Use AI ChatGPT vs Perplexity Deep Research: business ideas test Greg Isenberg
  2. Video · How Founders Use AI Deep Research Battle: Gemini beats ChatGPT, Perplexity & Grok YouTube AI reviewer
  3. A prompting-focused comparison that shows how brief quality changes the winner. newsletter.learnprompting.org Article · How Founders Use AI Deep Research: ChatGPT vs. Gemini. Who wins? Learn Prompting
  4. A clear practitioner explainer of the five-step pipeline behind the reports. gend.co Article · How Founders Use AI ChatGPT Deep Research: How It Works and When to Use It Gend
  5. A blunt business-lens review that saves you from trusting the wrong tool for client-facing work. sectionai.com Article · How Founders Use AI We tested two Deep Research tools. One was unusable. Section (AI business school)
  6. For technical founders: wire deep research into your own product or internal tools. developers.openai.com Guide · How Founders Use AI Introduction to deep research in the OpenAI API (Cookbook) OpenAI
  7. OpenAI's own research on why models bluff: training rewards guessing over admitting uncertainty. openai.com Article · How Founders Use AI Why language models hallucinate OpenAI
  8. Video · How Founders Use AI Why Large Language Models Hallucinate Martin Keen, IBM Technology
  9. Video · How Founders Use AI OpenAI Explains: Why Language Models Hallucinate & How to Reduce Them YouTube AI explainer
  10. Researchers debate what the hallucination paper actually means for everyday users. ibm.com Podcast · How Founders Use AI Why language models hallucinate (Mixture of Experts) IBM Mixture of Experts
  11. Video · How Founders Use AI How to Fact-Check ChatGPT and Other AI Tools YouTube tutorial
  12. The story behind the hallucination tracker and what patterns keep repeating. forbes.com Article · How Founders Use AI Attorneys: Track AI Hallucination Cases With This New Tool Lars Daniel, Forbes
  13. The largest study of AI answer accuracy: 3,000 responses, 18 countries, sobering numbers. ebu.ch Article · How Founders Use AI AI assistants misrepresent news content 45% of the time (EBU/BBC study) EBU / BBC
  14. A readable summary of which assistants failed worst and on what. journalism.co.uk Article · How Founders Use AI Nearly half of AI-generated answers contain an error (EBU-BBC report) Journalism.co.uk
  15. A master practitioner reframes the real risk: errors that look plausible and are never checked. simonw.substack.com Article · How Founders Use AI Hallucinations in code are the least dangerous form of LLM mistakes Simon Willison
  16. Shows the fix is process discipline, not abandoning the tools; directly transferable to founders. thomsonreuters.com Article · How Founders Use AI GenAI hallucinations are still pervasive in legal filings, but better lawyering is the cure Thomson Reuters Institute
  17. Librarians teach lateral reading, the single most useful verification technique. guides.library.vcu.edu Guide · How Founders Use AI How to Fact Check Generative AI Virginia Commonwealth University Libraries
  18. Explains why models invent perfectly formatted citations to papers that never existed. citely.ai Article · How Founders Use AI ChatGPT Gave You References? Here's How to Check If They're Real Citely
  19. A running tally of what unverified AI output costs professionals in the real world. gc.ai Article · How Founders Use AI AI Hallucination Legal Cases: A Sanctions Tracker GC AI
  20. Categorizes why people got caught (time pressure, lack of training), a mirror for your own habits. naturalandartificiallaw.com Tool · How Founders Use AI AI Hallucination Cases Tracker (international) Natural & Artificial Law
  21. A consultancy-grade playbook on prompting and retrieval patterns that reduce fabrication. devoteam.com Guide · How Founders Use AI Understanding and Correcting AI Hallucinations: The 2025 Guide Devoteam
  22. Video · How Founders Use AI ChatGPT, Claude, Gemini, Grok, Perplexity: Which One Is Actually Worth It? Tristan Ahumada
  23. 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
  24. 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

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The hubs