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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. Analyst-grade research reports on demand, the delegation most founders start with. openai.com Article · How Founders Use AI Introducing deep research OpenAI In 3 answers
  2. The single most important security idea for anyone deploying agents. simonwillison.net Article · How Founders Use AI The lethal trifecta for AI agents Simon Willison In 3 answers
  3. Market sizing: services are 10x the software market, and agents tap them. bvp.com Article · How Founders Use AI The State of AI 2025 Bessemer Venture Partners In 3 answers
  4. The investor-grade case for why agent pricing had to change. a16z.com Article · How Founders Use AI AI Is Driving a Shift Towards Outcome-Based Pricing a16z In 3 answers
  5. Real price points: $2/conversation, $0.99/resolution, per-task AI SDRs. substack.com Thread · How Founders Use AI The most disruptive AI pricing models so far Kyle Poyar In 3 answers
  6. 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 3 answers
  7. The free-tier option: near report quality in under 3 minutes, ideal for bootstrapped founders. perplexity.ai Article · How Founders Use AI Introducing Perplexity Deep Research Perplexity In 3 answers
  8. A founder-level walkthrough from question to structured, cited market report. validatemysaas.com Guide · How Founders Use AI How to Use ChatGPT's Deep Research for Market Research Validate My SaaS In 3 answers
  9. Turns market research upside down: mine Reddit, Fiverr and search data for unmet demand. gregisenberg.com Article · How Founders Use AI Find winning startup ideas from AI and data Greg Isenberg In 3 answers
  10. A competitive-intelligence vendor is candid about where ChatGPT fails at CI. klue.com Article · How Founders Use AI How to Do Competitive Analysis with ChatGPT (And When to Avoid Using It) Klue In 3 answers
  11. The written playbook version if you want the tactics without the audio. lennysnewsletter.com Article · How Founders Use AI How to get ChatGPT to recommend your product (writeup) Lenny's Newsletter In 3 answers
  12. The straight answer from Anthropic, including how to toggle training off. privacy.claude.com Guide · How Founders Use AI Is my data used for model training? Anthropic In 3 answers
  13. Voice injection means swapping generic claims for things only you could say. foundera.co Article · How Founders Use AI Founder Voice in the AI Era: Don't Sound Like AI Foundera In 3 answers
  14. The clipping workflow: one 30-minute video into 10-20 ranked shorts. opus.pro Guide · How Founders Use AI How to Turn Long-Form Videos into YouTube Shorts at Scale OpusClip In 3 answers
  15. The written breakdown of his 60M-views-a-month avatar pipeline. sigmastory.in Article · How Founders Use AI How AI Creator Varun Mayya Has Automated Video Making Using Digital Avatars SigmaStory In 3 answers
  16. Battle-tested prompts covering the full arc from ICP research to first-touch drafting. blog.hubspot.com Article · How Founders Use AI ChatGPT for sales prospecting: 10 prompts from research to outreach HubSpot In 3 answers
  17. The most complete practitioner guide to authentication, warmup, and volume pacing. smartlead.ai Guide · How Founders Use AI Email Deliverability Guide: SPF, DKIM, Warmup & Everything That Gets You to the Inbox Smartlead In 3 answers
  18. Two of SaaS's sharpest voices on which sales admin AI genuinely takes off your plate. saastr.com Article · How Founders Use AI Jason + Lenny: the real future of AI in sales SaaStr In 3 answers
  19. The model maker's own playbook, clear, ordered from most to least effective, and kept current as models change. platform.claude.com Guide · How Founders Use AI Prompt engineering overview (official Claude docs) Anthropic In 3 answers
  20. Explains why the support agent priced per outcome is now called Fin and sold inside Salesforce. salesforce.com Article · How Founders Use AI Salesforce Completes Acquisition of Fin Salesforce In 3 answers
  21. Kuaishou's launch release for Kling 4.0: up to 30 seconds in one pass, steadier fast motion and up to 15 reference assets. bernama.com Article · How Founders Use AI Kling AI Officially Launches Next-Generation Kling 4.0, Raising the Bar for Professional-Grade Video Models Kuaishou (via Bernama) In 3 answers
  22. ElevenLabs' launch post for Eleven v4: 90+ languages, one voice speaking any of them, 10-second instant clones and professional... elevenlabs.io Article · How Founders Use AI Eleven v4: Our most expressive text-to-speech AI model yet ElevenLabs In 3 answers
  23. What Meta's revised Commercial Terms change: you carry the responsibility for images, translations and links its AI adds to... ppc.land Article · How Founders Use AI Meta makes advertisers solely responsible for its AI ad edits from Oct 30 PPC Land In 3 answers
  24. Usage data on ChatGPT, Gemini and Claude, including how many people use more than one, which backs the... a16z.com Article · How Founders Use AI The Top 100 Gen AI Consumer Apps, 6th Edition Andreessen Horowitz In 3 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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