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. Unifies four ad libraries in one feed and AI-tags the hook and angle of each creative. adeye.ai Tool · How Founders Use AI AdEye: See Every Ad Your Competitors Run AdEye
  2. A repeatable framework for translating competitor patterns into your own briefs. trendtrack.io Article · How Founders Use AI How to Spy on Competitor Ads: Complete Framework Trendtrack
  3. Category map of spy tools with what each layer adds beyond the free libraries. bestever.ai Article · How Founders Use AI 11 Top Tools to Spy on Competitor Ads Bestever
  4. The 3-5x CPA per concept and 60-30-10 allocation rules, spelled out with numbers. admanage.ai Guide · How Founders Use AI Creative Testing Budget: 2026 Guide (Meta + TikTok) AdManage
  5. Ties weekly variant volume to daily spend so you test at the right scale. admanage.ai Article · How Founders Use AI How Many Ad Creatives to Test? (The Real Answer) AdManage
  6. A simple calculator-style method for founders setting their first test budget. flighted.co Article · How Founders Use AI How to Calculate Your Meta Ads Creative Testing Budget Flighted
  7. A full testing framework covering structure, budgets, and decision rules. topgrowthmarketing.com Guide · How Founders Use AI Meta Ads Creative Testing Framework for DTC Brands Top Growth Marketing
  8. Tactics for raising testing velocity without blowing up your CPA. adgpt.com Article · How Founders Use AI Meta Ads Creative: How to Test More and Find Winners Fast AdGPT
  9. The contrarian case that Meta's AI now does your test-campaign job for you. podcasts.apple.com Podcast · How Founders Use AI AI Is Making Creative Testing Campaigns Obsolete The Andrew Faris Podcast
  10. Updated 2025 buying rules including 15-20 ads per ad set and learning-phase traps. open.spotify.com Podcast · How Founders Use AI 7 Meta Ads Tactics I've Changed My Mind About The Andrew Faris Podcast
  11. Teaches you to stop reacting to noise, the number-one testing mistake. podcasts.apple.com Podcast · How Founders Use AI Meta Ads Are NOT Volatile (And Believing They Are Is Costing You) The Andrew Faris Podcast
  12. When and how to scale a winner without destroying its economics. open.spotify.com Podcast · How Founders Use AI Natural CAC & the Meta Auction: Scale Without Killing ROAS The Andrew Faris Podcast
  13. Big-spend principles distilled for founders managing their own budgets. podcasts.apple.com Podcast · How Founders Use AI Advanced Meta & Google Ads Media Buying Principles from a $250M/Year Marketer The Andrew Faris Podcast
  14. Video · How Founders Use AI The Foundations of Meta Ads Creative Testing You HAVE to Get Right Andrew Faris
  15. Volume-on-a-budget production math for the AI creative era. commercetracks.com Podcast · How Founders Use AI How to Build a HUGE Volume of High-Performing Meta Ads (For Cheap) The Andrew Faris Podcast (via CommerceTracks)
  16. The single best ongoing feed on DTC media buying discipline; subscribe, not just sample. podcasts.apple.com Podcast · How Founders Use AI The Andrew Faris Podcast Andrew Faris
  17. A $600M-spend buyer on budgeting, testing, and judging ads by first reactions. podcasts.apple.com Podcast · How Founders Use AI Ugly Ads Perform Best, Marketer Says (Barry Hott replay) Ecommerce Conversations (feat. Barry Hott)
  18. A concrete recovery story when testing structure broke under the new engine. 1clickreport.com Article · How Founders Use AI Meta Andromeda Update: 5 Settings That Recovered Our ROAS in 14 Days 1ClickReport
  19. Why 10-20 genuinely distinct concepts became the testing baseline. adscale.com Article · How Founders Use AI Meta Andromeda Update: New Creative Strategy for Facebook and Instagram Ads AdScale
  20. Explains why duplicating a winner with tiny edits no longer counts as testing. madwise-agency.com Article · How Founders Use AI Creative Diversity: The Fuel Behind Andromeda Madwise
  21. Peer-reviewed research on the 39%-negative sentiment, with practical mitigations. forbes.com Article · How Founders Use AI AI Ads Trigger Backlash: What Research Says Leaders Can Do Forbes (Melissa Wheeler)
  22. The cautionary case files: what specifically went wrong in each pulled campaign. news.designrush.com Article · How Founders Use AI 7 Worst AI Advertising Backfires of 2025 DesignRush News
  23. Names the underlying dynamic: authenticity is becoming the scarce, priced asset. koinsights.com Article · How Founders Use AI The Authenticity Premium: Why Consumers Are Rejecting AI-Generated Content Kate O'Neill (KO Insights)
  24. Early warning on positioning your whole brand around AI-made everything. breef.com Article · How Founders Use AI The AI Marketing Backlash: Why 'AI-First' Brands Are Starting to Fall Flat Breef

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