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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 · How Founders Use AI How to Use Perplexity AI 2025 (Step by Step Tutorial for Beginners) YouTube tutorial
  2. The India moment for AI search: Perplexity Pro bundled free for Airtel users, worth checking if you qualify. airtel.in Article · How Founders Use AI Airtel partners with Perplexity: Pro for 360mn customers Airtel
  3. Why web-grounded Claude changed the calculus for founders who prefer Claude's reasoning. venturebeat.com Article · How Founders Use AI Anthropic just gave Claude a superpower: real-time web search VentureBeat
  4. OpenAI's own India-focused session on replacing search with ChatGPT's research stack. academy.openai.com Video · How Founders Use AI ChatGPT for Research: Web Search, Deep Research & Code (OpenAI Academy India) OpenAI Academy India
  5. Video · How Founders Use AI Introduction to Deep Research (launch demo from Tokyo) OpenAI
  6. Video · How Founders Use AI OpenAI's Deep Research Agent in 8 Minutes YouTube explainer
  7. The official how-to including query limits per plan, so you spend your monthly runs wisely. help.openai.com Guide · How Founders Use AI Deep research in ChatGPT (Help Center) OpenAI
  8. Google's launch post explaining the plan-approve-refine flow Gemini pioneered. blog.google Article · How Founders Use AI Try Deep Research and our new experimental model in Gemini Google
  9. Short official playbook on editing the research plan and asking for report revisions. blog.google Guide · How Founders Use AI How to use Google's Deep Research: official tips Google
  10. One page on capabilities and supported inputs, useful before committing to a tool. gemini.google Guide · How Founders Use AI Gemini Deep Research overview Google
  11. Video · How Founders Use AI No Priors Ep. 112: OpenAI Deep Research with Isa Fulford No Priors (Sarah Guo, Elad Gil)
  12. Isa Fulford and Josh Tobin on what the agent is actually good and bad at, from the source. sequoiacap.com Podcast · How Founders Use AI OpenAI's Deep Research on Training AI Agents End-to-End (Training Data) Sequoia Capital
  13. A widely shared operator thread: use a strong model to write your deep research prompt first. x.com Thread · How Founders Use AI How I'm using Deep Research (prompting walkthrough) BuccoCapital Bloke
  14. A fill-in-the-blanks system that reliably turns vague questions into report-grade briefs. ahmadosman.com Guide · How Founders Use AI My Ultimate DeepResearch Prompt Builder Template Ahmad Osman
  15. A living library of proven deep research prompts across OpenAI, Gemini and Qwen. github.com Tool · How Founders Use AI awesome-deep-research-prompts (GitHub) LangGPT community
  16. 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
  17. Video · How Founders Use AI Deep Research Battle: Gemini beats ChatGPT, Perplexity & Grok YouTube AI reviewer
  18. 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
  19. 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
  20. 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)
  21. 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
  22. 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
  23. Video · How Founders Use AI Why Large Language Models Hallucinate Martin Keen, IBM Technology
  24. Video · How Founders Use AI OpenAI Explains: Why Language Models Hallucinate & How to Reduce Them YouTube AI explainer

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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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