Explore

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. Updated adoption frameworks that treat AI feature usage as its own funnel. userpilot.com Article · How Founders Use AI How to Measure Product Adoption: Metrics for Human Users and AI Agents Userpilot
  2. Useful for B2B founders whose buyers now ask for AI usage reporting. capably.ai Article · How Founders Use AI Measuring AI Adoption Metrics Capably
  3. Why accuracy alone is a vanity metric and what to track instead. stackai.com Article · How Founders Use AI Measuring Enterprise AI Success: Essential KPIs Beyond Accuracy StackAI
  4. The Wharton professor's definitive framing of the shift from searching for links to delegating research. oneusefulthing.org Article · How Founders Use AI The End of Search, The Beginning of Research Ethan Mollick
  5. The primary source on how ChatGPT blends live web results with a conversational interface. openai.com Article · How Founders Use AI Introducing ChatGPT search OpenAI
  6. A hands-on, regularly updated comparison of the two tools founders reach for first. zapier.com Article · How Founders Use AI Perplexity vs. ChatGPT: Which AI tool is better? Zapier
  7. Side-by-side query tests that show concretely when AI search saves time and when Google still wins. felloai.com Article · How Founders Use AI Google Search vs. Perplexity: The Best Search Tool for Daily Use in 2025 Fello AI
  8. A structured teardown of how the answer-engine experience differs from the link-list experience. llmrefs.com Article · How Founders Use AI Perplexity vs Google: A Head-to-Head SEO and UX Analysis LLMrefs
  9. The official quick-start covering Search, Research and Labs modes so you use the right one per task. perplexity.ai Guide · How Founders Use AI Getting Started with Perplexity Perplexity
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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)
  22. 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
  23. 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
  24. 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

Show the next 24

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
eChai Partner Brands The partnership →