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 solo technical founder does not need a community team, but you do need to stop doing the same small tasks by hand every day.... Zapier Tool · Setup in an afternoon · Starting Up Community Management Automation with Zapier Zapier
  2. Benchmarks only matter once you can plot your own cohorts and see whether your curve is flattening, and Amplitude's Retention... Amplitude Docs Tool · Reference documentation plus free product · Starting Up Amplitude Retention Analysis (chart documentation) Amplitude
  3. Most churned users will never reply to your email or hop on a call, so your best shot is a one-line reason captured right where... tally.so Tool · Set up in under 10 minutes · Starting Up Subscription Cancellation Survey Template Tally
  4. The specific worry in the question is people gaming the program, so here is a concrete, working example of what fraud detection... Rewardful Tool · product page · Starting Up Rewardful: Self-Referral Fraud Detection Rewardful
  5. Once your referral program needs commission tracking, coupon links, and payouts tied to real revenue, hand-rolling all of that... Rewardful Tool · Pricing page, plans from 49 dollars a month · Starting Up Rewardful: Affiliate and Referral Software Pricing Rewardful
  6. For a transactional or one time purchase product, retention lives in lifecycle nudges: onboarding, cart recovery, post purchase... Customer.io Tool · Product / platform · Starting Up Customer.io (lifecycle and behavioral messaging platform) Customer.io
  7. A raw wa.me link gets the message shared but tells you nothing about who referred whom, so once sharing works you need... AppsFlyer Tool · Long-form guide plus product · Starting Up WhatsApp deep links: How to create, use, and measure them AppsFlyer
  8. Reading about k-factor is one thing, measuring your own is another. This is a plug-in-your-numbers spreadsheet: enter your user... Rows Tool · Free web tool · Starting Up Virality (k-factor) Calculator and Spreadsheet Rows
  9. If you decide usage pricing is right, this is real billing infrastructure that meters events in real time and lets you set... Metronome Tool · Product site, plus docs · Starting Up Metronome: Usage-Based Billing Platform Metronome (now part of Stripe)
  10. This is the template to stop guessing a single LTV number and plot your actual cohorts instead. You type in only the basics... andrewchen.com Tool · Downloadable Excel template plus short guide · Starting Up The easiest spreadsheet for churn, MRR, and cohort analysis Christoph Janz (Point Nine Capital), guest post on Andrew Chen's blog
  11. A free, driver-based Google Sheets model where you plug in your own assumptions and actuals and watch the numbers flow through... Drivetrain Tool · Free Google Sheets template, roughly 30 to 60 minutes to populate · Starting Up SaaS Financial Model Template in Google Sheets Drivetrain
  12. If you are building from an Indian base and selling worldwide, this is a practical, India-registered way to take card and... Razorpay Tool · Product page plus docs · Starting Up Accept International Payments for Global Business (Razorpay) Razorpay
  13. The infrastructure margin leak usually shows up as a bill that crept up while you were shipping, so the fix is seeing it before... vantage.sh Tool · Self-serve setup, roughly 30 minutes · Starting Up Vantage Vantage
  14. This is a ready folder structure (sections A to M covering legal, IP, employment, financials, and cap table) that you can stand... alexanderjarvis.com Template · Downloadable checklist (folders A to M) · Starting Up Due Diligence Request List Template for Startup Fundraising Alexander Jarvis
  15. This is the data-room number, not the slide: a free, download-and-fill spreadsheet from a Point Nine partner that builds MRR... SaaStr Template · 20 min setup · Starting Up SaaS Financial Plan 2.0 (Christoph Janz's downloadable model) Christoph Janz (Point Nine Capital)
  16. This is the exact 21-slide deck that got Front three term sheets in ten days, published by the founder herself with honest... Medium (Mathilde Collin, CEO of Front) Template · 12 min read + 21-slide deck · Starting Up Front Series A Deck (with the founder's own slide-by-slide feedback) Mathilde Collin
  17. This is the modeling tool to actually stack your conversions before you sign, which is the whole opinionated answer. You enter... Carta Tool · free tool · Starting Up SAFE and Convertible Note Calculator Carta
  18. This is the actual term sheet most Indian angels and seed funds put in front of you, hosted on the official Startup India... Startup India (Government of India portal) Template · term sheet PDF · Starting Up LetsVenture Standard CCPS Term Sheet Template (India), Pre-emptive Rights clause LetsVenture
  19. This is the source of the rule your answer is built on: build the deck from the reports you already run the company with, send... Sequoia Capital Template · 15 min read · Starting Up Preparing a Board Deck Sequoia Capital
  20. For a contractor in another country, the two things that bite you are IP ownership and misclassification, and this free... Deel Template · template · Starting Up Independent Contractor Agreement Template (with country-specific IP guidance) Deel
  21. Written by the talent team at a VC that hires for its portfolio full-time, so it is a recruiter's actual playbook, not generic... SignalFire Template · 15 min read · Starting Up Startup Job Description Template Crystal Guerrero (Director of Talent Operations)
  22. This turns your 'written, specific milestones on day one' into an actual document you can hand a new hire, with a phased... Asana Template · 15 min read · Starting Up How to write a 30-60-90 day plan (with template and examples) Asana
  23. This is the single doc your first hire should walk into. It is built for a founder without an HR team, splits the first three... FirstHR Template · downloadable DOCX, 15 min to adapt · Starting Up Free 30-60-90 Day Plan Template for Small Business FirstHR
  24. This is the concrete, copy-paste artifact the other two essays lack: a real JD skeleton (summary, Who You Are, nine... vChief Template · 12 min read · Starting Up Chief of Staff Job Description, Duties & Interview Questions vChief

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