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. A trusted Meta ads operator separates the AI creative tactics that work from the hype. foxwelldigital.com Guide · How Founders Use AI AI and Creative for Meta Ads in 2025: A Definitive Guide Andrew Foxwell (Foxwell Digital)
  2. A practical small-budget testing setup for AI-generated ads from a top performance creative. x.com Thread · How Founders Use AI Dara Denney on testing AI ads across different budgets Dara Denney
  3. A creative agency actually tested the generator tools, so you skip the trial-and-error. superside.com Article · How Founders Use AI 10 Best AI Ad Creative Generators & Tools (Tested) Superside
  4. Sensible framing of where AI belongs in each stage of the creative process. goprimer.com Article · How Founders Use AI Make Ads That Convert: AI in the Creative Process Primer
  5. First-party training on marketing use cases straight from the people building the model. openai.com Course · How Founders Use AI ChatGPT for marketing teams (OpenAI Academy) OpenAI
  6. Concrete prompt patterns for audience insights, messaging tests, and campaign angles. academy.openai.com Guide · How Founders Use AI ChatGPT for marketing: use cases OpenAI Academy
  7. A measurement company's sober take on where genAI genuinely moves performance numbers. funnel.io Article · How Founders Use AI How generative AI is transforming performance marketing Funnel
  8. Copy-paste persona prompts from a long-running independent ecommerce publication. practicalecommerce.com Article · How Founders Use AI ChatGPT Prompts for Customer Personas Practical Ecommerce
  9. A user-research tool's honest take on where AI personas help and where they mislead. looppanel.com Guide · How Founders Use AI How to Create a ChatGPT Persona in 2025 Looppanel
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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)
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. How small DTC teams cut video production costs ~60% while scaling YouTube spend. adgpt.com Article · How Founders Use AI YouTube Ads AI: Scale DTC Creative Without Fatigue AdGPT
  22. Compares the analysis layer of the stack: Motion, Foreplay, Atria and more. tryatria.com Article · How Founders Use AI 7 Best AI Ad Tools for Creative Analysis in 2026 Atria
  23. Frames why founders should rebuild marketing around AI workflows, not headcount. x.com Thread · How Founders Use AI Vibe coding transformed dev cycles; vibe marketing is next Greg Isenberg
  24. All workflows, prompts, and tools in one 30-minute crash course. x.com Thread · How Founders Use AI The COMPLETE guide to MARKETING with AI (vibe marketing 101) Greg Isenberg

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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
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