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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. Practical audience-intelligence and targeting-strategy prompts for early-stage marketers. m1-project.com Guide · How Founders Use AI How to Use ChatGPT for Marketing M1-Project
  2. Ad-specific prompts from a tool used daily by performance creative teams. foreplay.co Guide · How Founders Use AI How to Use ChatGPT for Facebook Ads: 10 Useful Prompts Foreplay
  3. Performance-tested prompts tied to metrics, not just clever copy. pixis.ai Article · How Founders Use AI 18 ChatGPT Prompts for Ad Creative and Copywriting That Improve Performance Pixis
  4. Structured variant-generation templates built around PAS, BAB, and AIDA frameworks. get-ryze.ai Guide · How Founders Use AI ChatGPT Prompts for Facebook Ads: 15 Copy Templates That Work Ryze AI
  5. A top consumer-psychology strategist on turning emotional research into ad creative. podcasts.apple.com Podcast · How Founders Use AI How to Utilize Psychological Biases in Marketing with Sarah Levinger The Marketing Millennials (feat. Sarah Levinger)
  6. Video · How Founders Use AI How Sarah Levinger Uses Psychology To Scale Meta Ads in 2025 Sarah Levinger (interview)
  7. Deep dive on research methods that surface insights AI alone would miss. thecopywriterclub.com Podcast · How Founders Use AI TCC Podcast #448: Finding Better Persuasive Insights with Sarah Levinger The Copywriter Club
  8. Why emotional data beats demographic targeting, and how AI accelerates finding it. elumynt.com Podcast · How Founders Use AI Human Psychology: The Most Overlooked Aspect of Modern Marketing (Sarah Levinger) Elumynt
  9. Video · How Founders Use AI Dara Denney Reveals the Biggest Creative Analysis Mistake Dara Denney
  10. Video · How Founders Use AI Performance Creative: Velocity, AI Tooling, and the Paid-Organic Relationship with Dara Denney Dara Denney (interview)
  11. Mainstream verification of the most cited small-team, big-spend AI app story. cnbc.com Article · How Founders Use AI 18-year-old CEO's calorie app Cal AI makes $1.4 million a month CNBC
  12. The full arc from teen side project to exit, including the paid growth engine. inc.com Article · How Founders Use AI He Built an AI App in High School, Made $40 Million, and Sold to MyFitnessPal Inc. (Ben Sherry)
  13. Breaks the growth playbook into replicable steps: creator network, paid, and retention. superframeworks.com Article · How Founders Use AI Cal AI Case Study: $0 to $50M+ ARR in 18 Months Superframeworks
  14. Dissects the 250-creator native-content engine behind Cal AI's paid TikTok machine. stormy.ai Article · How Founders Use AI The Cal AI TikTok Marketing Playbook: Scaling to $2M/Month Stormy AI
  15. Focuses on the AI tooling side of the same story for builders on a budget. metaschool.so Article · How Founders Use AI How 17-Year-Old Zach Used ChatGPT to Build Cal AI to $1M/mo Metaschool
  16. Bootstrapped founder explains the paid, sales, and influencer channels behind $10M ARR in 20 months. open.spotify.com Podcast · How Founders Use AI From $5K to $10M ARR: The ArcAds Founder's Playbook SaaS Interviews (feat. Romain Torres)
  17. Candid detail on running a lean AI ads company and the product ideas it surfaced. open.spotify.com Podcast · How Founders Use AI Romain Torres (Arcads AI): Growing to $7M ARR in 18 Months The Manav Podcast
  18. Video · How Founders Use AI $200K/mo with ONE AI Ad (We tell you HOW) Greg Isenberg (The Startup Ideas Podcast)
  19. Shaan and Sam break down the leanest AI-powered growth stories in consumer apps. mfmpod.com Podcast · How Founders Use AI The AI App Doing $6M With 1 Employee My First Million
  20. What AI avatars change about who can afford creator-style paid campaigns. open.spotify.com Podcast · How Founders Use AI How AI Influencers Are Replacing Human Creators (Romain Torres) Superhuman AI podcast
  21. The clearest picture of an agent-heavy, human-light marketing org actually running. intelligentartifice.net Podcast · How Founders Use AI This AI video startup founder scaled to 7 figures with more agents than employees Intelligent Artifice (feat. Romain Torres)
  22. Video · How Founders Use AI The Startup Automating 1,000+ Ads a Week (Romain Torres, Arcads) Work In Progress Podcast
  23. A solo operator's real numbers: 12 retainers on an under-$500/month AI stack. medium.com Article · How Founders Use AI One-Person Agency, 10x Output: How Solo Marketers Use AI to Scale Unkoa Marketing
  24. The counterweight: where the small-team AI stories still depend on human judgment. foxwelldigital.com Article · How Founders Use AI Why AI in Performance Marketing Still Needs Great Humans Foxwell Digital

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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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