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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. The definitive tool map from recruiting through synthesis, updated regularly. userinterviews.com Guide · How Founders Use AI 30+ AI Tools for Every Phase of UX Research User Interviews
  2. Survey data on how teams actually use AI in synthesis and the time it saves. lyssna.com Article · How Founders Use AI Research Synthesis Report 2025: AI, Methods & Time Investment Lyssna
  3. An honest map of what AI moderation matches humans on and what it cannot do. getperspective.ai Article · How Founders Use AI AI-Moderated Interviews: How They Work, When to Use Them, and What They Replace Perspective AI
  4. Video · How Founders Use AI 24 Hours Inside a YC AI Startup (Outset) Y Combinator
  5. The research frontier on simulating customers, and why to stay skeptical of it. arxiv.org Article · How Founders Use AI Synthetic Founders: AI-Generated Social Simulations for Startup Validation Research arXiv (academic)
  6. A documented 6-weeks-to-8-days discovery compression, step by step. aakashgupta.medium.com Article · How Founders Use AI AI Just Made Product Discovery 10x Faster (Here's the Exact Process) Aakash Gupta
  7. Includes conversational data querying and research patterns from the best PMs. lennysnewsletter.com Article · How Founders Use AI How top PMs increase their leverage with AI Lenny's Newsletter
  8. Torres's actual day-to-day setup for automating research legwork. lennysnewsletter.com Article · How Founders Use AI How I AI: Teresa Torres uses Claude Code as her research and writing system Lenny's Newsletter (How I AI)
  9. A running feed of screen-shared research workflows, prompts included. lennysnewsletter.com Podcast · How Founders Use AI How I AI (show hub): practical AI workflows from top operators Claire Vo / Lenny's Network
  10. The piece that made GEO a category: visibility now means being inside the answer. a16z.com Article · How Founders Use AI How Generative Engine Optimization (GEO) Rewrites the Rules of Search Andreessen Horowitz
  11. The agency's own annotated version with extra implementation detail. graphite.io Article · How Founders Use AI The Ultimate Guide To AEO (Graphite's companion notes) Graphite
  12. A longer cut going deeper on Reddit strategy without spamming. open.spotify.com Podcast · How Founders Use AI The ultimate guide to AEO (Director's Cut) on Masters of Search Masters of Search
  13. Real user behavior data: AI Mode users accept the model's shortlist, so be on it. growth-memo.com Article · How Founders Use AI What Our AI Mode User Behavior Study Reveals about the Future of Search Kevin Indig
  14. 815K query-page pairs show focused pages beat ultimate guides for citations. growth-memo.com Article · How Founders Use AI The science of how AI pays attention Kevin Indig
  15. Video · How Founders Use AI How to Dominate AI Search Results in 2025 (GEO + AEO + SEO Masterclass) YouTube masterclass
  16. Video · How Founders Use AI The New SEO Playbook for AI Search (Top GEO Ranking Factors) YouTube SEO channel
  17. Video · How Founders Use AI AI SEO for Beginners: Rank #1 in ChatGPT in 2025 YouTube SEO channel
  18. Video · How Founders Use AI The New SEO: How to Rank in ChatGPT, Claude & Other AI Tools YouTube marketing channel
  19. Video · How Founders Use AI Mastering AEO + GEO: How I Got ChatGPT To Rank My Tool #1 Indie founder (YouTube)
  20. A skeptical check on the llms.txt trend before you invest time in it. journal.withdaydream.com Article · How Founders Use AI a16z Feature LLMs.txt: Hype vs. Reality Daydream
  21. Indig unpacks the behavior shift behind all the AEO tactics. marketingspeak.com Podcast · How Founders Use AI The Future of Search Isn't Search (with Kevin Indig) Marketing Speak
  22. Google's own positioning of NotebookLM as a grounded research partner. blog.google Article · How Founders Use AI Do your best research with NotebookLM Google
  23. The update that lets NotebookLM gather web sources for you, not just read uploads. blog.google Article · How Founders Use AI NotebookLM adds Deep Research and support for more source types Google
  24. The best mainstream end-to-end guide to what it does and how to start. fastcompany.com Guide · How Founders Use AI The complete guide to NotebookLM Fast Company

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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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