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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 same masterclass in podcast form for the commute. open.spotify.com Podcast · How Founders Use AI Why AI evals are the hottest new skill (audio) Lenny's Podcast In 2 answers
  2. Video · How Founders Use AI Harrison Chase on Deep Agents, LangSmith, and Earning Trust NVIDIA AI Podcast (Harrison Chase) In 2 answers
  3. Sierra's founder on agents as the new front door for every brand. sierra.ai Podcast · How Founders Use AI No Priors Ep. 82: Bret Taylor on company-branded agents No Priors (Bret Taylor) In 2 answers
  4. Why enterprise software's future belongs to vertical agents, per its loudest champion. pigment.com Podcast · How Founders Use AI Vertical AI Agents | Bret Taylor on Perspectives Pigment Perspectives (Bret Taylor) In 2 answers
  5. The unvarnished go-to-market grind behind a vertical agent startup. upstartsmedia.com Podcast · How Founders Use AI Jesse Zhang on sales battles, AI wrapper revenge, and making agents work Upstarts Media (Jesse Zhang) In 2 answers
  6. Patterns from 60+ agent companies distilled into a usable framework. growthunhinged.com Article · How Founders Use AI A new framework for AI agent pricing Kyle Poyar (Growth Unhinged) In 2 answers
  7. Why 95% of AI startups get pricing wrong, from the field's leading advisor. lennysnewsletter.com Podcast · How Founders Use AI Pricing and scaling your AI product | Madhavan Ramanujam Lenny's Podcast (Madhavan Ramanujam) In 2 answers
  8. The evidence that base-plus-usage hybrids outperform pure models. revenuecreator.com Podcast · How Founders Use AI Why hybrid pricing already won the AI era Revenue Creator (Kyle Poyar) In 2 answers
  9. A catalogue of every live agent pricing model with examples. getmonetizely.com Guide · How Founders Use AI The 2026 Guide to SaaS, AI, and Agentic Pricing Models Monetizely In 2 answers
  10. The billing-infrastructure view of metering agents without angering customers. flexprice.io Article · How Founders Use AI Why AI Companies Have Adopted Usage-Based Pricing Flexprice In 2 answers
  11. A quick taxonomy to pick your starting model in an afternoon. pickaxe.co Article · How Founders Use AI AI Agent Pricing Models Explained Pickaxe In 2 answers
  12. Kills the 'wait for GPT-next' excuse; harness engineering is the work. venturebeat.com Article · How Founders Use AI LangChain's CEO: better models alone won't get your agent to production VentureBeat (Harrison Chase) In 2 answers
  13. A founder who beat the failure rate explains what enterprise-grade actually took. podcasts.apple.com Podcast · How Founders Use AI How Decagon Built Human-Level AI Support | Ashwin Sreenivas Startup Project (Ashwin Sreenivas) In 2 answers
  14. The canonical guide: curation beats clever prompting for agents. anthropic.com Guide · How Founders Use AI Effective context engineering for AI agents Anthropic In 2 answers
  15. The write, select, compress, isolate framework every team now uses. langchain.com Article · How Founders Use AI Context Engineering for Agents LangChain In 2 answers
  16. Why context, not model size, unlocks agents that work for hours. sequoiacap.com Podcast · How Founders Use AI Context Engineering Long-Horizon Agents | Harrison Chase Sequoia Training Data (Harrison Chase) In 2 answers
  17. Closes the loop: a prototype only pays off if you put it in front of users, and this shows how. maze.co Guide · How Founders Use AI How to test and validate AI prototypes with users Maze In 2 answers
  18. What to prompt when the tool gets stuck in a loop of broken fixes. blog.techforproduct.com Article · How Founders Use AI How to debug AI prototypes Colin Matthews (Tech for Product) In 2 answers
  19. The foundational YC lesson on extracting truth from user conversations. ycombinator.com Video · How Founders Use AI How to talk to users Y Combinator In 2 answers
  20. The most rigorous framework for when AI research participants are and are not legitimate. nngroup.com Article · How Founders Use AI Synthetic users: if, when, and how to use AI-generated research Nielsen Norman Group In 2 answers
  21. The crispest articulation of the unknown-unknowns problem with AI feedback. radicalproduct.com Article · How Founders Use AI Synthetic users vs real user research: why AI falls short Radical Product Thinking In 2 answers
  22. The default AI deck tool for founders: narrative in, designed deck out. gamma.app Tool · How Founders Use AI Gamma AI pitch deck generator Gamma In 2 answers
  23. The image model that renders readable text, essential for posters and social graphics. ideogram.ai Tool · How Founders Use AI Ideogram Ideogram In 2 answers
  24. A hot AI startup's own bot invented a policy and triggered cancellations; the cautionary tale of 2025. theregister.com Article · How Founders Use AI Cursor AI support bot hallucinated its own company policy The Register In 2 answers

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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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