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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. Covers combining review, survey, and support data into one AI pass. ravecapture.com Article · How Founders Use AI How to Analyze Customer Feedback with AI RaveCapture
  2. When to trust AI theming and when a human needs to review the codebook. getthematic.com Article · How Founders Use AI Analyze Open-Ended Survey Responses with AI Thematic
  3. The academic gold standard, useful for making your AI-assisted analysis defensible. atlasti.com Guide · How Founders Use AI Thematic Analysis in Surveys: Guide & Examples ATLAS.ti
  4. The short written version to revisit each planning cycle. ycombinator.com Guide · How Founders Use AI How to choose a metric and set your KPI Y Combinator
  5. Fresh retention benchmarks including the AI-era 'smiling curve' phenomenon. a16z.com Article · How Founders Use AI Retention Is All You Need Andreessen Horowitz
  6. Still the best cohort-analysis explainer written for first-time SaaS founders. medium.com Guide · How Founders Use AI The P9 Guide to Cohort Analysis in SaaS Christoph Janz (Point Nine)
  7. Shows AI building your cohort table when spreadsheets intimidate you. saas.wtf Article · How Founders Use AI SaaS Cohort Analysis using AI SaaS.wtf
  8. A worked churn analysis with ChatGPT you can replicate on your own export. saas.wtf Article · How Founders Use AI Churn Analysis using ChatGPT SaaS.wtf
  9. Warns how AI-driven signup waves distort early retention data. userpilot.com Article · How Founders Use AI Cohort Retention Analysis: How to Separate Real Users From AI Tourists Userpilot
  10. An India-based product studio's metric list mapped to SaaS vs e-commerce. f22labs.com Article · How Founders Use AI 15 Essential Startup Growth Metrics & KPIs to Track F22 Labs
  11. Jargon-free cohort mechanics aimed at founders, not analysts. blog.mean.ceo Guide · How Founders Use AI Cohort Analysis for Retention: A Founder's Guide MEAN CEO
  12. Argues for fewer numbers, better defined, matched to your stage. blog.mean.ceo Guide · How Founders Use AI Analytics Stack for Different Startup Stages: Pre-Seed to Series MEAN CEO
  13. Turns cohort tables into concrete churn-reduction actions. baremetrics.com Article · How Founders Use AI How to Cut Churn Using Cohort Analysis (No Jargon) Baremetrics
  14. A practitioner's guide to letting AI agents monitor your metrics for you. adasight.com Article · How Founders Use AI Amplitude AI Agents: Smarter Product Decisions Adasight
  15. What to measure and build at each stage so you never over-invest early. definite.app Guide · How Founders Use AI Data Analytics for Startups: A Stage-by-Stage Framework Definite
  16. How to set up metrics infrastructure that AI tools can actually reason over. tasman.ai Guide · How Founders Use AI The Founder's Guide to an AI-Native Data Stack in 2025 Tasman Analytics
  17. OpenAI's own recipe, including keeping the original file untouched while writing a cleaned copy. learn.chatgpt.com Guide · How Founders Use AI Clean and prepare messy data (official use case) OpenAI
  18. A structured course if data cleanup is a recurring part of your week. datacamp.com Course · How Founders Use AI Cleaning Data with Generative AI DataCamp
  19. Covers formats, missing values, and outliers across ChatGPT, Claude, and Gemini. analyticsvidhya.com Article · How Founders Use AI How to Use AI for Data Cleaning Analytics Vidhya
  20. A data journalist's controlled experiment showing exactly where AI cleaning fails. robertorocha.info Article · How Founders Use AI Using ChatGPT to clean data: an experiment Roberto Rocha
  21. The foundational prompt patterns for inconsistencies, capitalization, and spacing. packtpub.com Guide · How Founders Use AI Data Cleaning Made Easy with ChatGPT Packt
  22. Compact reference of cleansing prompts you can keep beside your keyboard. docs.kanaries.net Guide · How Founders Use AI Streamline Data Cleansing with ChatGPT Kanaries
  23. A tool survey for when one-off prompting stops scaling. numerous.ai Article · How Founders Use AI 7+ Must-Have AI Tools for Data Cleaning in Spreadsheets Numerous.ai
  24. Goes beyond cleaning into enrichment: filling gaps with AI-sourced context. peakdigitalstudio.com Article · How Founders Use AI How To Clean Data and Enhance It With AI Peak Digital

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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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