Explore

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. 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
  2. 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
  3. 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)
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. A quick, neutral capability matrix across the big three chat tools. geeksforgeeks.org Article · How Founders Use AI ChatGPT vs Claude vs Gemini for Data Analysis: A Comparative Overview GeeksforGeeks
  10. Tests the models on actual marketing datasets rather than benchmarks. improvado.io Article · How Founders Use AI Claude vs ChatGPT vs Gemini vs DeepSeek: Which AI Drives Faster Marketing Insights? Improvado
  11. Clarifies the chat-tool vs notebook-platform split so you don't overbuy. deepnote.com Article · How Founders Use AI Hex vs Julius AI: a side-by-side comparison Deepnote
  12. Vendor-written but unusually candid about when plain ChatGPT is the right answer. julius.ai Article · How Founders Use AI Julius AI vs ChatGPT: What's Better for Data Analysis and You? Julius AI
  13. A recent, detailed comparison including reasoning depth and hallucination tendencies. elephas.app Article · How Founders Use AI ChatGPT vs Claude vs Gemini: A Comprehensive Data Analysis Elephas
  14. A builder's shortlist that cuts the market down to five real options. guptadeepak.com Article · How Founders Use AI Top 5 AI Data Analysis Tools: Julius AI vs ChatGPT vs the Rest Deepak Gupta
  15. Shows what agentic analysis looks like when it has access to your warehouse, not just a CSV. hex.tech Article · How Founders Use AI Introducing the Notebook Agent Hex
  16. Rare quantitative accuracy data comparing AI spreadsheets on identical tasks. rows.com Article · How Founders Use AI Introducing the AI Spreadsheet Benchmark Rows
  17. A practitioner's field notes rather than a spec-sheet comparison. lightcapai.medium.com Article · How Founders Use AI Claude vs ChatGPT vs Gemini (2025): A Comparative Analysis from the Trenches Faruk Alpay
  18. Frames the market as four lanes (chat, notebook, spreadsheet, warehouse) so you pick by workflow. buildmvpfast.com Article · How Founders Use AI Best AI for Data Analysis: ChatGPT, Hex, Julius, Deepnote BuildMVPFast
  19. A small-business test across real tasks, closest to a founder's daily mix. thelittledesigngroup.com Article · How Founders Use AI ChatGPT vs Gemini vs Claude: We Tested All 3 for Business The Little Design Group
  20. A week-long real-usage review from an emerging-market lens, not a sponsored skim. techpoint.africa Article · How Founders Use AI I tested Julius AI for 7 days: here is my honest review Techpoint Africa
  21. Explains how schema-aware SQL generation actually works and its real accuracy numbers. builder.ai2sql.io Guide · How Founders Use AI Text-to-SQL Complete Guide: Tools, Accuracy, Real Examples AI2SQL
  22. Covers the metadata-only options that never send your actual rows to the model. selectstar.com Article · How Founders Use AI Best Text-to-SQL Tools for AI Analytics Select Star
  23. A database performance veteran connects Claude straight to Postgres, no code layer. kylehailey.com Article · How Founders Use AI Natural Language Access to Postgres with Claude Desktop and MCP Kyle Hailey
  24. The security-first version: least-privilege roles and network isolation done right. tailscale.com Guide · How Founders Use AI Securely connect Claude Code to Postgres via MCP Tailscale

Show the next 24

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
eChai Partner Brands The partnership →