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. 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
  2. Video · How Founders Use AI How to Use Copilot in Excel: Full Tutorial (2025) Lisa Crosbie
  3. 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
  4. Measured accuracy of AI spreadsheets on identical tasks, a reminder to check AI totals before you use them. rows.com Article · How Founders Use AI Introducing the AI Spreadsheet Benchmark Rows
  5. 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
  6. 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
  7. The best-known open-source route to chatting with your own SQL database. vanna.ai Tool · How Founders Use AI Vanna 2.0: build agents your users can actually use Vanna AI
  8. Video · How Founders Use AI Vanna AI: Build SQL AI Chatbots To Talk To Database (open source) Universe of AI
  9. Video · How Founders Use AI Text to SQL with Ollama and Vanna, locally, with any database Fahd Mirza
  10. Video · How Founders Use AI Vanna: Chat (RAG) With SQL Databases MG
  11. 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
  12. 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
  13. A step-by-step Docker setup an ops-minded founder can follow in an evening. opstree.com Guide · How Founders Use AI The Ultimate Guide to Postgres MCP for Claude Desktop OpsTree
  14. The fastest no-code path if you just want to ask your database questions today. windsor.ai Guide · How Founders Use AI How to Connect PostgreSQL to Claude in 1 Minute (No-Code MCP) Windsor.ai
  15. A first-person build log with the mistakes left in, useful for realistic expectations. medium.com Article · How Founders Use AI Building My First MCP Server: Connecting Claude to PostgreSQL Umar M
  16. A free-to-try generator that works from just your schema, no data upload. text2sql.ai Tool · How Founders Use AI Text2SQL.ai: text to SQL and AI query generator Text2SQL.ai
  17. Compares the field including which tools process metadata only, a key privacy line. text2sql.ai Article · How Founders Use AI Best SQL AI Tools in 2025: Complete Comparison Guide Text2SQL.ai
  18. A free schema-aware converter, handy for one-off queries without a subscription. chartdb.io Tool · How Founders Use AI ChartDB Text to SQL converter ChartDB
  19. Engineers debating where text-to-SQL breaks, the caveats vendors won't tell you. news.ycombinator.com Thread · How Founders Use AI Vanna.ai: Chat with your SQL database (Hacker News discussion) Hacker News
  20. Video · How Founders Use AI How to do AI analysis you can actually trust (audio) Lenny's Reads
  21. Spotify version for founders who live in podcasts. open.spotify.com Podcast · How Founders Use AI How to do AI analysis you can actually trust (Spotify) Lenny's Reads
  22. Explains non-determinism: why even temperature zero runs differ, and what to do about it. chattermill.com Article · How Founders Use AI Why ChatGPT and Claude Give You Different Answers Every Time You Analyze Feedback Chattermill
  23. Concrete failure cases like '40% growth' that was actually 14%, and the guardrails. databox.com Article · How Founders Use AI How to Prevent AI Hallucinations: 3 Hidden Threats When AI Analyzes Your Data Databox
  24. A clear-eyed look at where LLM analysis of real datasets goes wrong. verbagpt.com Article · How Founders Use AI On Accuracy When LLMs Analyze Real-World Data VerbaGPT

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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