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. YC's founder-angle interview: what agentic coding means for startups. ycombinator.com Video · How Founders Use AI Inside Claude Code with its creator Boris Cherny Y Combinator
  2. A CEO describing non-technical teammates shipping via the terminal. x.com Thread · How Founders Use AI Dan Shipper: Claude Code cracked something open for us Dan Shipper
  3. The clearest head-to-head, including advice for non-technical founders. builder.io Article · How Founders Use AI Claude Code vs Cursor: What to Choose Builder.io
  4. Covers the other big coding agent so you compare all three. builder.io Article · How Founders Use AI Codex vs Claude Code: which is the better AI coding agent? Builder.io
  5. A long-term usage report rather than a launch-week hot take. thenewstack.io Article · How Founders Use AI Claude Code vs. Cursor vs. Codex vs. Antigravity, six months in The New Stack
  6. The intermediate techniques that separate toy use from real product work. softcery.com Guide · How Founders Use AI Agentic Coding with Claude Code and Cursor: Skills, Subagents, Hooks, MCP Softcery
  7. The no-code-founder end of the spectrum, mapped by its biggest player. lovable.dev Guide · How Founders Use AI Best Vibe Coding Tools: Build Apps by Chatting Lovable
  8. Compares what these builders actually generate under the hood. techsy.io Article · How Founders Use AI Lovable vs Bolt vs v0: What Your Code Looks Like Techsy
  9. An emerging-market reviewer's honest take on the big three app builders. techpoint.africa Article · How Founders Use AI Lovable vs Bolt vs v0: my honest review Techpoint Africa
  10. Includes the security caveats (the Veracode findings) most guides skip. shareuhack.com Guide · How Founders Use AI The Complete Vibe Coding Guide: How Non-Engineers Can Build Apps with AI Shareuhack
  11. A repeatable idea-to-deployed-MVP workflow with realistic timeboxes. vibecoding.app Guide · How Founders Use AI Vibe Coder's Guide to Building a Shippable MVP in 4 Hours Vibecoding.app
  12. Video · How Founders Use AI Simon Willison: Engineering practices that make coding agents work The Pragmatic Summit (Simon Willison)
  13. Honest answers on what coding agents still get wrong. simonw.substack.com Article · How Founders Use AI Fireside chat about agentic engineering Simon Willison
  14. A dev-shop comparison grounded in client project work. f22labs.com Article · How Founders Use AI Cursor Agent vs Claude Code: A Comparative Guide F22 Labs
  15. The earlier YC talk with the playbook for picking your vertical. ycombinator.com Video · How Founders Use AI Why Vertical LLM Agents Are The New $1 Billion SaaS Opportunities Y Combinator
  16. The macro argument for why agents expand rather than shrink the market. a16z.com Article · How Founders Use AI Good news: AI Will Eat Application Software a16z
  17. Puts the agent wave in the context of past platform shifts. stratechery.com Article · How Founders Use AI An Interview with Bret Taylor About AI Agents and Tech History Lessons Stratechery (Ben Thompson)
  18. From Google Maps to Sierra: how he evaluates the agent opportunity. sierra.ai Podcast · How Founders Use AI Bret Taylor on Lenny's Podcast Lenny's Podcast (Bret Taylor)
  19. Concrete, priced agent ideas you could start validating this week. x.com Thread · How Founders Use AI 35 startup ideas to start in 2025 (SaaS, AI agents) Greg Isenberg
  20. A second batch of buildable agent wedges with revenue models attached. x.com Thread · How Founders Use AI 30 startup ideas to build in 2025 (AI agents, SaaS, tools) Greg Isenberg
  21. A full teardown of how one vertical agent company reached $1.5B+. research.contrary.com Article · How Founders Use AI Decagon Business Breakdown & Founding Story Contrary Research
  22. The competitive dynamics of the hottest vertical, told through two rivals. upstartsmedia.com Article · How Founders Use AI Decagon, Sierra and the Race to Build Customer Support Agents Upstarts Media
  23. Proof that boring niches (dealership phone calls) make great agent businesses. techcrunch.com Article · How Founders Use AI Toma's AI voice agents have taken off at car dealerships TechCrunch
  24. The voice-agent market map, a whole sub-category of vertical opportunity. a16z.com Article · How Founders Use AI Hi, AI: Our Thesis on AI Voice Agents a16z

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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