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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. Beginner-friendly walkthrough with the run-duration heuristic for spotting winners. simplified.com Article · How Founders Use AI Meta Ad Library: How to Use It to Spy on Competitors Simplified
  2. Automates the tagging and pattern-recognition layer over the public ad libraries. adriselab.com Tool · How Founders Use AI Competitor Ad Analysis: AI-Powered Meta Ad Library Intel AdRiseLab
  3. Always-on competitor tracking with creative velocity and transcription built in. foreplay.co Guide · How Founders Use AI How to Use Spyder in Foreplay Foreplay
  4. What changed when ad spying went from screenshots to structured AI insights. foreplay.co Article · How Founders Use AI Spyder 2.0: Your Creative-First Ad Spy & Insights Platform Foreplay
  5. A current tools-plus-strategy map across Meta, Google, and TikTok libraries. get-ryze.ai Guide · How Founders Use AI How to Spy on Competitors' Ads (Tools & Strategy Guide) Ryze AI
  6. Step-by-step on Google's transparency tools for video ad research. adlibrary.com Guide · How Founders Use AI YouTube Ad Library: How to Search Competitor Video Ads AdLibrary.com
  7. Cross-platform spy tool for founders whose competitors live on YouTube. adspyder.io Tool · How Founders Use AI AdSpyder YouTube Ads Spy Tool AdSpyder
  8. Tracks a billion-plus ads across ten platforms for wider competitive sweeps. bigspy.com Tool · How Founders Use AI BigSpy YouTube Ad Library BigSpy
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. Video · How Founders Use AI The Foundations of Meta Ads Creative Testing You HAVE to Get Right Andrew Faris
  23. 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)
  24. 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

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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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