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. 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
  2. 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
  3. Video · How Founders Use AI Learn 80% of NotebookLM in Under 13 Minutes! Jeff Su In 3 answers
  4. 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
  5. Concrete picture of what elite AI-assisted marketing actually looks like. podcasts.apple.com Podcast · How Founders Use AI This Is How the Top 1% Marketers Are Using AI Marketing Against The Grain In 3 answers
  6. 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
  7. The default tool for turning one long video into 10-20 ranked short clips. opus.pro Tool · How Founders Use AI OpusClip OpusClip In 3 answers
  8. Video · How Founders Use AI The Founder Who Automated Content Creation Using AI (Varun Mayya) Bad Decisions Podcast In 3 answers
  9. Your literal voice: clone it for narration once your written voice is dialed. elevenlabs.io Tool · How Founders Use AI ElevenLabs Voice Cloning ElevenLabs In 3 answers
  10. 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
  11. 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
  12. The report that settled it: prompts alone do not create ownership. copyright.gov Guide · How Founders Use AI Copyright and AI, Part 2: Copyrightability (Full Report) US Copyright Office In 3 answers
  13. Video · How Founders Use AI How to Make the Most Realistic AI Videos (Step-by-Step Tutorial) Marketing Against The Grain (Kipp Bodnar & Kieran Flanagan) In 3 answers
  14. Primary source on GPTBot vs OAI-SearchBot vs ChatGPT-User, so you allow search and control training separately. developers.openai.com Guide · How Founders Use AI Overview of OpenAI Crawlers (official docs) OpenAI In 3 answers
  15. Video · How Founders Use AI Founder-Led Sales for Y Combinator Demo Day (Sam Blond) Sam Blond (ex-CRO Brex) 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. Anthropic's starting page for prompting, ordered from the most to the least effective techniques. platform.claude.com Guide · How Founders Use AI Prompt engineering overview (Claude docs) Anthropic In 3 answers
  20. The definitive reference on how project files, project-level instructions, and project memory actually behave, worth skimming... help.openai.com Guide · How Founders Use AI Projects in ChatGPT (official help guide) OpenAI Help Center In 3 answers
  21. See exactly what $12 vs $76 a month buys in credits before committing. runway.com Tool · How Founders Use AI Runway pricing Runway In 3 answers
  22. Lovable's own post on planning an app, or working on a launched one, in chat before spending any build credits. lovable.dev Article · How Founders Use AI You can now chat with Lovable for free Lovable In 3 answers
  23. Cursor's current plans after the SpaceX deal: what the $8 and $30 plans include and that other makers' models are billed... cursor.com Tool · How Founders Use AI Cursor pricing Cursor In 3 answers
  24. 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

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 →