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. Before you sink 50 to 120 hours into a launch, read this honest first-person account of what a launch actually returned across... Plain Sight Ventures Essay · Short essay, roughly a 6 minute read · Starting Up Is Product Hunt Worth It? Jason Walkow
  2. This is the clearest essay on why a flattening cohort retention curve is the thing that actually matters, and it lives on... andrewchen.com Essay · ~12 min read · Starting Up Retention is King Jamie Quint
  3. Most first-time founders either track nothing or drown themselves by logging every click, and this piece makes the case for the... Mean CEO Essay · Starting Up Event Tracking Strategy: What to Measure and Why Violetta Bonenkamp
  4. This is the piece that answers the second half of your question head on: when is it too early to even care. Skok's site is the... For Entrepreneurs (David Skok) Essay · Starting Up Why Early-Stage Startups Should Wait to Calculate LTV:CAC, and How They Should Use It When They Do Jared Sleeper and David Skok
  5. US benchmarks quietly assume US ACVs and US venture cash, so they mislead an Indian founder. This piece grounds the numbers in... upGrowth Article · Starting Up CAC Benchmarks for Indian B2B SaaS by ARR Band: The Real Numbers for 2026 Amol Ghemud
  6. This gives you the mental picture and the evidence in one place: a bucket full of holes barely fills no matter how fast you... Amplitude Article · Starting Up The Leaky Bucket Problem: More Users Don't Mean More Long-Term Growth Noorisingh Saini
  7. Most active-user counts quietly measure app opens, which is exactly the dishonesty this question is trying to avoid. This piece... Mixpanel blog Article · Starting Up Monthly active users (MAU): Definition, formula, and 2026 benchmarks Mixpanel
  8. This is the honest counter-argument most growth advice skips: when you have low traffic, formal A/B tests usually cannot reach... Entrepreneur Essay · Starting Up The Case Against A/B Testing at Early-Stage Startups Andrew Cohen
  9. When a lot of your funnel lives on WhatsApp, in-store, or over a phone call, the clean website conversion metrics stop telling... Ginesys Article · ~12 min read · Starting Up How Indian D2C Brands are Getting Customers to Return to their Site Ginesys
  10. Most founders call a paid campaign a winner or loser off a handful of clicks, and this piece walks through exactly why that... GuessTheTest Article · Starting Up Calculating Sample Size in A/B Testing: Everything You Need to Know Deborah O'Malley
  11. This is written from the point of view of the person who clicked your ad and then left, which is exactly the founder standing... Unbounce Essay · About a 10 minute read · Starting Up I Wanted to Convert on Your Landing Page, But I Couldn't. Here's Why. Amy Middleton Hebdon
  12. This is the cleaner half of the answer you actually asked: when a creative wears out and how often to swap it. Motion analyzes... Motion Article · 10 min read · Starting Up Ad Fatigue: What It Is and How to Avoid It Motion
  13. This is the piece that names the exact trap you are in: your ad platforms each claim credit for the same sales, so the numbers... Occam's Razor Essay · About a 15 minute read · Starting Up Marketing Analytics: Attribution Is Not Incrementality Avinash Kaushik
  14. This is the clearest honest take on the exact question: does capturing the lead inside the ad beat sending someone to your... Trio Media Article · ~8 min read · Starting Up Meta Ads Strategy: Lead Forms vs Website Conversions Claire Daniels
  15. This is the cleanest answer to the exact question of how to divide cold and warm budgets when you are just starting. It gives... Demand Curve Article · ~10 min read · Starting Up Prospecting and Retargeting Campaigns Demand Curve
  16. Before you obsess over the exact split, it helps to see why prospecting and retargeting exist at all and where each one sits in... Demand Curve Essay · ~8 min read · Starting Up Why social ads break the traditional funnel (Growth Newsletter #303) Demand Curve
  17. This is the rare piece that actually answers the question you asked, is the creator deal really cheaper, instead of quoting a... Sagum Article · about 12 minute read · Starting Up Influencer Marketing vs Digital Ads: The Real Cost Analysis Sagum
  18. This is a plain, practical breakdown of the three reasons Meta accounts actually get banned (policy violations, security flags,... Dancing Chicken Media Article · About a 10 minute read · Starting Up How to Prevent Meta Ad Account Bans Dancing Chicken Media
  19. Before you force yourself in front of a camera you dread, it is worth asking whether you truly need to be there, and this piece... ZoomSphere Article · Starting Up Faceless Content: How to Build a Personal Brand (Without Showing Your Face) Amanda Ryan
  20. This is the rare piece that treats the exact judgment call in the question instead of just cheerleading for personal branding.... Cultmethod Essay · ~12 min read · Starting Up Personal Brand vs. Business Brand (and the Secret Third Option): When to Choose Each Jon Persson
  21. This one names the failure mode the question is really worried about: an audience that follows you, not your product, and never... SUCCESS Article · ~8 min read · Starting Up The Personal Brand Trap Most Founders Never See Coming SUCCESS staff
  22. Most advice tells you to build in public without showing you what a non salesy post actually looks like, and this piece fixes... ravah.app Article · ~15 min read · Starting Up 27 Build in Public Post Ideas for Founders (With Examples) Usama
  23. This is a plain, numbered checklist of the exact errors most founders repeat in their first weeks of posting: pitching the... DotSimple Article · Starting Up The 9 Most Common Content Mistakes on LinkedIn That Founders Should Avoid DotSimple
  24. Before you worry about sounding different online, this teaches you to sound clear, and clarity is where a real voice starts.... Harper Collins / Google Books Book · 336 pages · Starting Up On Writing Well: The Classic Guide to Writing Nonfiction William Zinsser

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