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. A deep prompt bank covering pains, triggers, objections, and anti-personas. medium.com Article · How Founders Use AI 18 ChatGPT Prompts To Understand Your Ideal Customer Profile Nizamuddin Siddiqui (Medium)
  2. Worked persona examples showing good versus generic AI output. m1-project.com Article · How Founders Use AI ChatGPT Personas: Definition, Examples & How to Generate Them M1-Project
  3. Describe an audience in plain language and get its actual demographics and hangouts. sparktoro.com Article · How Founders Use AI How to Find Hyper-Specific Audiences with SparkToro's New AI Features SparkToro
  4. The best pattern in this space: real audience data in, LLM synthesis out. sparktoro.com Article · How Founders Use AI How to Use SparkToro + LLMs to Do Marketing Magic SparkToro
  5. Emphasises the 15 minutes of real data collection that makes AI audience research non-generic. mysocial.io Guide · How Founders Use AI ChatGPT for Audience Research: Copy-Paste Prompts Mysocial
  6. A respected marketer's five-prompt persona system with alignment use cases. orbitmedia.com Article · How Founders Use AI How to Create AI Personas: 5 Prompts for Smart Marketing Alignment Orbit Media (Andy Crestodina)
  7. A simple end-to-end persona example to model your first attempt on. amperly.com Article · How Founders Use AI Creating an Ideal Customer Persona with ChatGPT Amperly
  8. An independent review of the leading trend-detection engine founders use for idea validation. unite.ai Article · How Founders Use AI Exploding Topics Review: Uncover Trends Before They Blow Up Unite.AI
  9. Covers Meta Trends, the feature that groups signals into bigger market shifts. makerstack.co Article · How Founders Use AI Exploding Topics Review MakerStack
  10. Founder-angle walkthrough of using trend data to validate market timing. startupik.com Article · How Founders Use AI Exploding Topics: Spot Fast-Rising Trends Before Everyone Else Startupik
  11. Includes Glimpse, the free browser extension that supercharges Google Trends. answersocrates.com Article · How Founders Use AI Top 7 Exploding Topics Alternatives (Free & Paid) AnswerSocrates
  12. The free-tool version: reading rising queries and breakout terms like an analyst. wbtrends.com Guide · How Founders Use AI Google Trends in 2025: How to Find Hot Topics Before They Explode WbTrends
  13. Primary platform data on where attention is moving, straight from Google. business.google.com Article · How Founders Use AI Top YouTube trends to know for 2025 Think with Google
  14. Surveys the new class of multi-platform trend-prediction tools like TrendTrack. aitoolstoday.blog Article · How Founders Use AI This AI Predicts Trends Before They Happen AI Tools Today
  15. YouTube search is an underrated demand signal; this shows how to read it early. vidiq.com Article · How Founders Use AI 7 Ways to Find Trending YouTube Topics Before They Peak vidIQ
  16. The live map of where Indian AI founders are finding opportunity right now. inc42.com Article · How Founders Use AI Indian AI Startup Tracker: 170+ Startups Putting India On The Global AI Map Inc42
  17. The authoritative India GenAI landscape report for grounding opportunity claims. nasscom.in Article · How Founders Use AI India Generative AI Startup Landscape 2025: Mapping the Momentum nasscom
  18. An investor's curated read on which Indian AI categories have real momentum. activatesignal.substack.com Article · How Founders Use AI India's Top AI Startups - 2025 Pratyush Choudhury
  19. OpenAI priced ChatGPT Plus with a Google Form and Van Westendorp, the perfect founder anecdote. strategence-us.com Article · How Founders Use AI AI's Most Human Move: How ChatGPT Used Van Westendorp Pricing to Set Its $20 Plan Strategence
  20. Clear explanation of reading the four intersecting price curves. mainbrainresearch.com Article · How Founders Use AI Van Westendorp Pricing Model: How to Find the Perfect Price MainBrain Research
  21. A researcher's honest take on the method's assumptions and failure modes. fullstackresearcher.substack.com Article · How Founders Use AI The Van Westendorp Method for Optimal Product Pricing Full Stack Researcher
  22. When to graduate from Van Westendorp to conjoint analysis as stakes rise. getmonetizely.com Article · How Founders Use AI Pricing Model Research: Using Van Westendorp & Conjoint Analysis to Set Price Points Monetizely
  23. A billing-infrastructure company's practical framing for SaaS founders. getlago.com Article · How Founders Use AI What Is The Van Westendorp Pricing Model And How Does It Work? Lago
  24. Step-by-step execution detail including sample sizes that make results meaningful. quali-fi.com Guide · How Founders Use AI Van Westendorp Pricing Model: Step-by-Step Guide Quali-Fi

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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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