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.
- 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
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Video · How Founders Use AI
Deep Research Battle: Gemini beats ChatGPT, Perplexity & Grok
YouTube AI reviewer
- 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
- 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
- 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)
- 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
- 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
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Video · How Founders Use AI
Why Large Language Models Hallucinate
Martin Keen, IBM Technology
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Video · How Founders Use AI
OpenAI Explains: Why Language Models Hallucinate & How to Reduce Them
YouTube AI explainer
- 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
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Video · How Founders Use AI
How to Fact-Check ChatGPT and Other AI Tools
YouTube tutorial
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
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Video · How Founders Use AI
ChatGPT, Claude, Gemini, Grok, Perplexity: Which One Is Actually Worth It?
Tristan Ahumada
- 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
- 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
The hubs
Starting Up
Find an idea, validate it, build, and land your first customers.
GTM
Go-to-market, from breaking in to how the best teams do it.
D2C
Building a direct-to-consumer brand, India-first.
Wealth
Paying yourself, ESOPs, secondaries, and de-risking founder wealth.
How Founders Use AI
How founders actually put AI to work, mapped topic by topic.
Glossary
Plain-language definitions of the startup and VC terms you'll hit.