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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. A current end-to-end workflow: assumptions, search signals, complaints, landing page, outreach, in two days. spectrumailab.com Guide · How Founders Use AI How to Validate a Startup Idea With AI Before You Build Anything Spectrum AI Lab
  2. Includes ready templates so the 48-hour test starts immediately instead of with a blank page. digitalapplied.com Guide · How Founders Use AI AI Business Validation: Test Any Idea in 48 Hours Digital Applied
  3. Seven pre-build validation methods you can execute with AI assistance in days, not weeks. lemonpage.ai Article · How Founders Use AI 7 Ways to Validate a Product Idea Without Building an MVP LemonPage AI
  4. Explains when a smoke test is the right instrument and how to read its results without fooling yourself. painonsocial.com Guide · How Founders Use AI Smoke Tests: A Complete Guide for Startup Founders PainOnSocial
  5. Head-to-head benchmark so you pick the right model for landscape work. panoramata.co Article · How Founders Use AI Which AI Tool Wins for Competitive Analysis? ChatGPT, Claude, and Gemini Compared Panoramata
  6. Gemini-specific prompts and workflow for competitor mapping with live web grounding. panoramata.co Article · How Founders Use AI How to Use Google Gemini for Competitor Analysis Panoramata
  7. An agent-based playbook showing what a full market scan looks like when AI does the legwork. manus.im Guide · How Founders Use AI AI Competitor Analysis Tool: Research Any Market Fast Manus
  8. Perplexity's cited answers make it the least hallucination-prone tool for competitor fact-finding. patrickfrank.com Article · How Founders Use AI Use Perplexity for Better Research + Competitive Analysis Patrick Frank
  9. A structured course if you want to go deep on AI-driven market intelligence rather than piece it together. udemy.com Course · How Founders Use AI ChatGPT Competitive Analysis: Master AI Market Intelligence Udemy
  10. 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
  11. 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
  12. 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)
  13. 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
  14. 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
  15. 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)
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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

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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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