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. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. Feature-by-feature walkthrough aimed at people making commerce and launch assets. shopify.com Guide · How Founders Use AI How to use Canva AI: 10 Magic Studio features Shopify In 2 answers
  13. 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
  14. The business-impact view of the Cursor incident, including the labelling fix that followed. fortune.com Article · How Founders Use AI A customer support AI went rogue, and it's a warning for every company Fortune In 2 answers
  15. A neutral incident record, and a database worth browsing before you ship anything customer-facing. incidentdatabase.ai Article · How Founders Use AI AI Incident Database: Cursor support bot invents login policy AI Incident Database In 2 answers
  16. Nine hands-on chapters that take you from novice to competent prompter in a weekend. github.com Course · How Founders Use AI Anthropic's Interactive Prompt Engineering Tutorial Anthropic In 2 answers
  17. The primary source: API data is not used for training by default, with retention controls explained. openai.com Guide · How Founders Use AI Enterprise privacy at OpenAI OpenAI In 2 answers
  18. Anthropic's equivalent answer, including the commercial-products carve-out. privacy.claude.com Guide · How Founders Use AI Is my data used for model training? (Anthropic Privacy Center) Anthropic In 2 answers
  19. A startup-sized DPDP compliance checklist from an Indian privacy consultancy. tsaaro.com Article · How Founders Use AI Compliance Blueprint for AI Startups and SMEs: DPDPA 2023 and DPDP Rules 2025 Tsaaro Consulting (India) In 2 answers
  20. A trusted institutional primer on why hallucinations happen and practical mitigations. mitsloanedtech.mit.edu Guide · How Founders Use AI When AI Gets It Wrong: Addressing AI Hallucinations and Bias MIT Sloan Teaching & Learning Technologies In 2 answers
  21. Six concrete habits, including deliberately asking the model for contradicting evidence. forbes.com Article · How Founders Use AI 6 Proven Ways To Fact Check AI Accuracy And Verify Answers Forbes Technology Council In 2 answers
  22. A rigorous reference with famous real-world examples to share with your team. ibm.com Guide · How Founders Use AI What Are AI Hallucinations? IBM In 2 answers
  23. A Wharton professor's practical take on picking one main assistant and using its deep research mode well. oneusefulthing.org Guide · How Founders Use AI Using AI Right Now: A Quick Guide Ethan Mollick In 2 answers
  24. A respected SaaS operator's real workflows for market and GTM research with deep research. growthunhinged.com Article · How Founders Use AI How to use Deep Research for GTM Kyle Poyar, Growth Unhinged In 2 answers

Show the next 24

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
eChai Partner Brands The partnership →