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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. Fast tour of ten NotebookLM workflows, several research-specific. theaibreak.substack.com Guide · How Founders Use AI Tutorial: 10 NotebookLM Use Cases That Will 10x Your Productivity The AI Break
  2. A data professional's balanced take, with a video tutorial and example prompts. analythical.com Article · How Founders Use AI 4 Ways You Can Use ChatGPT for Market Research Analythical (Stephen Tracy)
  3. The Wharton professor's original field report on why an AI that writes its own code beats memorizing formulas. oneusefulthing.org Article · How Founders Use AI What AI can do with a toolbox: Getting started with Code Interpreter Ethan Mollick
  4. Shows AI restructuring messy PDF data and running models unprompted, the exact grunt work founders dread. x.com Thread · How Founders Use AI Ethan Mollick on Code Interpreter's statistical common sense Ethan Mollick
  5. Mollick's line that things that took weeks in his PhD were done in seconds, with fewer errors than a human analyst. fortune.com Article · How Founders Use AI Code Interpreter might be the most useful application of AI so far Fortune
  6. The balanced case for how much SQL a non-analyst actually needs now that AI writes queries. mavenanalytics.io Article · How Founders Use AI Do You Still Need to Learn SQL in the Age of AI? Maven Analytics
  7. A veteran SQL author argues the skill shifts from writing queries to judging them. sqlpatterns.com Article · How Founders Use AI Should you still learn SQL (in the age of LLMs)? Ergest Xheblati (Data Wise)
  8. The counter-argument: why a thin layer of SQL literacy still compounds even with AI on top. learnsql.com Article · How Founders Use AI SQL in 2025: What's New and Why It Still Matters LearnSQL.com
  9. A clean mental model for stacking AI on top of traditional tools instead of choosing between them. blog.datawithbaraa.com Article · How Founders Use AI Excel vs Power BI vs SQL vs Python vs AI Data With Baraa
  10. The sharpest industry writer on what AI actually changes about the analyst's craft. benn.substack.com Article · How Founders Use AI Analytics is at a crossroads Benn Stancil
  11. OpenAI's own free walkthrough, including the framing prompt 'I'm trying to decide X, based on Y'. openai.com Guide · How Founders Use AI Analyzing data with ChatGPT (OpenAI Academy) OpenAI
  12. A data-tool founder shows the practical ceiling of chat-based analysis, and how to work within it. definite.app Article · How Founders Use AI Analyzing data in ChatGPT like your job depends on it Definite
  13. The canonical reference for file uploads, supported formats, and getting chart output. help.openai.com Guide · How Founders Use AI Data analysis with ChatGPT (official help) OpenAI
  14. A university-grade walkthrough of a full exploratory analysis, not a toy demo. ai-analytics.wharton.upenn.edu Guide · How Founders Use AI Exploring Data with ChatGPT: A Step-by-Step Guide Wharton AI & Analytics Initiative
  15. Ready prompts that turn 50 open-ended survey responses into themes and sentiment in a minute. zonkafeedback.com Guide · How Founders Use AI Survey Analysis with ChatGPT: Prompts, Framework & When to Level Up Zonka Feedback
  16. A rigorous method for AI-assisted theme extraction that survives scrutiny. thematicanalysis.ai Guide · How Founders Use AI How to Analyse Open-Ended Survey Responses thematicanalysis.ai
  17. Independent research on where AI survey analysis is reliable and where it drifts. campaigninnovation.org Article · How Founders Use AI From Open-Ends to Insights: Leveraging AI in Survey Response Analysis Center for Campaign Innovation
  18. A respected marketer's concrete recipe for exporting GA4 data and interrogating it with AI. orbitmedia.com Article · How Founders Use AI How to combine ChatGPT with GA4 for content marketing insights Andy Crestodina (Orbit Media)
  19. Practical GA4-to-ChatGPT patterns for founders who find the GA4 interface hostile. monsterinsights.com Article · How Founders Use AI 8 Best Ways to Use ChatGPT with Google Analytics (GA4) MonsterInsights
  20. Honest about the failure modes of CSV-in-chat analysis, not just the wins. wisdom.ai Article · How Founders Use AI Analyze CSV Data with ChatGPT: Tutorial, Challenges, and Limitations Wisdom AI
  21. A structured course if your growth data lives in GA4 and you want repeatable AI workflows. udemy.com Course · How Founders Use AI ChatGPT For Google Analytics 4: Ultimate 2025 Guide Udemy
  22. Maps Claude's chat, code-execution, and Claude Code layers so you pick the right one per job. datastudios.org Article · How Founders Use AI Claude for data analysis: files, charts, code, and context Data Studios
  23. The primary source on what Claude for Excel is built to do and for whom. anthropic.com Article · How Founders Use AI Advancing Claude for Financial Services (Claude for Excel announcement) Anthropic
  24. Independent evidence of a full working spreadsheet built from a single prompt. x.com Thread · How Founders Use AI Ethan Mollick: Claude's Excel ability is the best I have seen (406 formulas from one prompt) Ethan Mollick

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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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