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. Video · How Founders Use AI Synthetic Users: AI "Participants" (video) Nielsen Norman Group
  2. 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
  3. Video · How Founders Use AI Accelerating Research with Synthetic Users Conference talk (YouTube)
  4. Video · How Founders Use AI Synthetic User Research Explained | How AI Is Changing UX YouTube creator (UX research)
  5. The sharpest critique: synthetic research borrows the authority of science without its standards. interactions.acm.org Article · How Founders Use AI The Synthetic Persona Fallacy: How AI-Generated Research Undermines UX Research ACM Interactions
  6. The industry-adoption view, including where synthetic data already works in production research. forbes.com Article · How Founders Use AI The Promising Rise Of Synthetic Personas In Market Research Forbes Tech Council
  7. Clean side-by-side of researched personas versus AI-generated ones. ixdf.org Article · How Founders Use AI Are AI-Generated Synthetic Users Replacing Personas? What UX Designers Need to Know Interaction Design Foundation
  8. An enterprise consultancy's measured take on synthetic consumer research. cognizant.com Article · How Founders Use AI The Rise of Synthetic Users: Are AI-Generated Personas The Future of Consumer Research? Cognizant
  9. The insights industry's own debate about synthetic respondents, from inside the profession. quirks.com Article · How Founders Use AI The future of synthetic respondents in the insights industry Quirk's
  10. A cognitive scientist answers the exact questions founders ask about synthetic users. podcasts.apple.com Podcast · How Founders Use AI All the questions you had about synthetic users (Insights Unlocked) UserTesting (Dr. John Whalen)
  11. A founder building synthetic-respondent tech explains the science and the guardrails. pragmaticinstitute.com Podcast · How Founders Use AI AI, Behavioral Economics, and the Future of Market Research with Avi Yashchin Pragmatic Institute
  12. A promise-versus-reality scorecard for synthetic responses in SaaS research. developmentcorporate.com Article · How Founders Use AI Synthetic Responses in Market Research: Promise vs. Reality Development Corporate
  13. Covers the methodology questions a survey platform has to answer before using synthetic data. idsurvey.com Article · How Founders Use AI Synthetic Data and Synthetic Personas in Market Research IdSurvey
  14. Useful distinction between simulating a persona and pretending it is research. urbinaconsulting.com Article · How Founders Use AI Synthetic users vs persona simulations Urbina Consulting
  15. The bull case from a startup building AI-persona research, worth reading critically. blog.atypica.ai Article · How Founders Use AI Market Research Is Being Rewritten: Why AI Personas Are the Next Core Capability Atypica
  16. Concrete examples of synthetic-audience research workflows in practice. deepsona.ai Article · How Founders Use AI How Synthetic Audiences Are Transforming Market Research Through AI Personas Deepsona
  17. A hands-on build of a synthetic persona interviewer, showing exactly what these systems can and cannot do. towardsdatascience.com Article · How Founders Use AI From Ad-Hoc Prompting to Repeatable AI Workflows with Claude Code Skills (synthetic persona interviews) Towards Data Science
  18. Video · How Founders Use AI How I use Reddit and AI to find winning startup ideas (2025 tutorial) Dr Alex Young
  19. Video · How Founders Use AI How I Use AI & Reddit to Find $1M+ Startup Ideas (FULL Blueprint) YouTube creator (startup ideas)
  20. A tight five-step thread: collect where the market talks, use AI to find repeated pain, act on it. x.com Thread · How Founders Use AI The AI version of market research as a service Corey Ganim
  21. Explains the community-signal thesis behind the most popular idea-mining product. linkedin.com Thread · How Founders Use AI I'm launching ideabrowser.com (launch post) Greg Isenberg
  22. The written companion with the exact prompts and Gumloop automation steps. blog.alexanderfyoung.com Article · How Founders Use AI How I use Reddit and AI to find winning startup ideas (written version) Dr Alex Young
  23. A practical low-code version using Gumloop, n8n, or Zapier to feed comments into an LLM. medium.com Article · How Founders Use AI How to Use Reddit and AI to Find Startup Ideas That Actually Work Andiebuk (Medium)
  24. Converts Reddit threads, search data, and YouTube signals into scored startup ideas daily. ideabrowser.com Tool · How Founders Use AI Ideabrowser Greg Isenberg

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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