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. Current investor expectations, including the Carta data on presenting both sizing directions. waveup.com Guide · How Founders Use AI TAM, SAM, SOM: How to calculate market size Waveup
  2. Reverse-engineers the evaluator's checklist so your AI-assisted numbers answer the real questions. goingvc.com Article · How Founders Use AI How Investors Use TAM, SAM, SOM to Evaluate Startups GoingVC
  3. A practical sizing guide from an Indian product studio, useful for India-market examples. f22labs.com Guide · How Founders Use AI TAM, SAM & SOM: How To Calculate the Market Size? F22 Labs (India)
  4. A pitch-deck consultancy's view on presenting the numbers investors will not roll their eyes at. spectup.com Guide · How Founders Use AI TAM, SAM, SOM: The Founder's Guide To Market Sizing Spectup
  5. Benchmarks to sanity-check whether the number your AI produced is even plausible for your industry. worthbuild.io Article · How Founders Use AI What Is a Good TAM for a Startup? Benchmarks by Industry WorthBuild
  6. One well-constructed research prompt, dissected so you can adapt it. inc.com Article · How Founders Use AI This Single ChatGPT Prompt Can Do Hours of Market Research in Minutes Inc. (Ben Sherry)
  7. A VC's view of the founder use cases where deep research replaces a hired consultant. iaglobal.vc Article · How Founders Use AI How to Grow Your Startup Using ChatGPT Deep Research IA Global VC
  8. Ready-made Perplexity prompts tuned for market questions. useme.com Guide · How Founders Use AI Quick Guide to Perplexity for Market Research (with Prompts) Useme
  9. Nine real tests that show where Perplexity's reports are strong and where they thin out. secondtalent.com Article · How Founders Use AI Perplexity Deep Research Review: 9 Real-World Tests Second Talent
  10. Prompt patterns you can adapt from marketing research to market research. godofprompt.ai Guide · How Founders Use AI 10 ChatGPT Deep Research Prompts For Marketing God of Prompt
  11. Covers Gemini's killer feature: editing the research plan before the agent runs. digitalapplied.com Guide · How Founders Use AI Google Gemini Deep Research: Complete Guide Digital Applied
  12. The gentlest on-ramp if deep research agents are new to you. exploreaitogether.com Guide · How Founders Use AI How to Use Gemini Deep Research: Complete Beginner's Guide Explore AI Together
  13. Business-research-specific comparison including cost per useful report. aryabhconsulting.com Article · How Founders Use AI Deep Research AI Tools Comparison: Gemini vs ChatGPT vs Perplexity for Business Research Aryabh Consulting
  14. Updates Mom Test practice for the AI-moderated interview era. koji.so Article · How Founders Use AI The Mom Test for Customer Interviews: How to Ask Questions That Get Real Answers Koji
  15. An honest technical account of what LLM qualitative analysis gets right and wrong. skimle.com Article · How Founders Use AI Using ChatGPT and other LLMs to analyse interviews and qualitative data Skimle
  16. A reusable Claude workflow that converts messy transcripts into themes and actions in 90 seconds. sidsaladi.substack.com Article · How Founders Use AI AI User Research Skill 101: A Claude Skill That Turns Raw Interview Dumps Into Themes Sid Saladi
  17. A copy-paste transcript analysis prompt to start with before building anything fancier. genaiuniversity.com Guide · How Founders Use AI Analyze Transcripts with Claude AI (Free Prompt) GenAI University
  18. Shows Claude Code processing many interviews in parallel, the power-user version of this workflow. marketbetter.ai Article · How Founders Use AI AI Customer Interview Analysis: Mining Discovery Calls for Intel with Claude Code MarketBetter
  19. A professional research firm's assessment of Claude for qualitative analysis, limits included. cascadeinsights.com Article · How Founders Use AI A Market Researcher's Review: Claude Cascade Insights
  20. A working researcher's real AI workflow rather than a tool vendor's pitch. userinterviews.com Article · How Founders Use AI How a UX Researcher Uses AI in Their Daily Workflow User Interviews
  21. Primary research on AI running interviews at scale and feeding results back to humans. anthropic.com Article · How Founders Use AI Introducing Anthropic Interviewer Anthropic
  22. How AI moderation removes the depth-versus-scale trade-off in discovery. listenlabs.ai Article · How Founders Use AI How to Scale User Interviews to Large Panels Listen Labs
  23. A full founder reference for discovery interviews with AI assistance woven in. userintuition.ai Guide · How Founders Use AI Customer Discovery Interviews: The Founder Guide User Intuition
  24. Actual empirical studies measuring how far AI-simulated behaviour diverges from real users. nngroup.com Article · How Founders Use AI Evaluating AI-Simulated Behavior: Insights from Three Studies on Digital Twins and Synthetic Users Nielsen Norman Group

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The hubs

Starting Up Find an idea, validate it, build, and land your first customers. 1327 questions GTM Go-to-market, from breaking in to how the best teams do it. 379 questions D2C Building a direct-to-consumer brand, India-first. 512 questions Wealth Paying yourself, ESOPs, secondaries, and de-risking founder wealth. 165 questions How Founders Use AI How founders actually put AI to work, mapped topic by topic. 360 questions Glossary Plain-language definitions of the startup and VC terms you'll hit. 425 terms
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