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 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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)
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. Why the same model gives different quality depending on how the spreadsheet agent works. x.com Thread · How Founders Use AI Ethan Mollick: Claude in Excel vs Microsoft's own Excel agent Ethan Mollick
  18. A skeptical outside view on where the add-in fits against Copilot. techradar.com Article · How Founders Use AI Anthropic's Claude just invaded Excel TechRadar Pro
  19. A veteran analyst's balanced scorecard, useful before you trust it with your model. dataanalysis.substack.com Article · How Founders Use AI Claude for Excel: What It Does Well and Where It Still Falls Short Olga Berezovsky (Data Analysis Journal)
  20. Google's own map of what Gemini can do inside Sheets, from charts to insights. workspace.google.com Guide · How Founders Use AI Gemini in Google Sheets (official hub) Google Workspace
  21. The reference for =AI("prompt", range), the single most useful Sheets AI primitive. support.google.com Guide · How Founders Use AI Use the AI function in Google Sheets Google
  22. The primary-source changelog on Gemini generating and filling data in Sheets. workspaceupdates.googleblog.com Article · How Founders Use AI Generate data with Gemini in Google Sheets Google Workspace Updates
  23. Worked examples of categorizing and summarizing data in cells without add-ons. kdnuggets.com Article · How Founders Use AI A Beginner's Guide to Mastering Gemini + Google Sheets KDnuggets
  24. An India-based data community's practical walkthrough with prompt examples. analyticsvidhya.com Article · How Founders Use AI How to Use Gemini in Google Sheets Analytics Vidhya

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The hubs

Starting Up Find an idea, validate it, build, and land your first customers. 1327 questions GTM Go-to-market, from breaking in to how the best teams do it. 379 questions D2C Building a direct-to-consumer brand, India-first. 512 questions Wealth Paying yourself, ESOPs, secondaries, and de-risking founder wealth. 165 questions How Founders Use AI How founders actually put AI to work, mapped topic by topic. 360 questions Glossary Plain-language definitions of the startup and VC terms you'll hit. 425 terms
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