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. The Finance Ministry's own questions and answers on the GST exemption for individual life and health insurance from 22... Ministry of Finance Guide · Wealth Exemption of GST on individual life and health insurance policies Department of Financial Services In 3 answers
  2. A plain explainer of how the labour codes' definition of wages changes a salary's structure, take-home pay, PF and tax. Business Today Article · Wealth Labour codes 2025: how the 50% wage rule resets salaries, tax and retirement savings Basudha Das In 3 answers
  3. What a resident has to report about foreign shares, accounts and income in Schedule FA, and what happens if they do not. ClearTax Article · Wealth Disclosure of foreign assets in your income tax return ClearTax In 3 answers
  4. Plan mode, context hygiene, and step-sizing from the tool's makers. code.claude.com Guide · How Founders Use AI Best practices for Claude Code Anthropic In 3 answers
  5. The official guide to training an agent with rules and data access across your apps. zapier.com Guide · How Founders Use AI Zapier Agents: Combine AI agents with automation Zapier In 3 answers
  6. Analyst-grade research reports on demand, the delegation most founders start with. openai.com Article · How Founders Use AI Introducing deep research OpenAI In 3 answers
  7. The single most important security idea for anyone deploying agents. simonwillison.net Article · How Founders Use AI The lethal trifecta for AI agents Simon Willison In 3 answers
  8. Market sizing: services are 10x the software market, and agents tap them. bvp.com Article · How Founders Use AI The State of AI 2025 Bessemer Venture Partners In 3 answers
  9. Real price points: $2/conversation, $0.99/resolution, per-task AI SDRs. substack.com Thread · How Founders Use AI The most disruptive AI pricing models so far Kyle Poyar In 3 answers
  10. The free-tier option: near report quality in under 3 minutes, ideal for bootstrapped founders. perplexity.ai Article · How Founders Use AI Introducing Perplexity Deep Research Perplexity In 3 answers
  11. A founder-level walkthrough from question to structured, cited market report. validatemysaas.com Guide · How Founders Use AI How to Use ChatGPT's Deep Research for Market Research Validate My SaaS In 3 answers
  12. Turns market research upside down: mine Reddit, Fiverr and search data for unmet demand. gregisenberg.com Article · How Founders Use AI Find winning startup ideas from AI and data Greg Isenberg In 3 answers
  13. A competitive-intelligence vendor is candid about where ChatGPT fails at CI. klue.com Article · How Founders Use AI How to Do Competitive Analysis with ChatGPT (And When to Avoid Using It) Klue In 3 answers
  14. The straight answer from Anthropic, including how to toggle training off. privacy.claude.com Guide · How Founders Use AI Is my data used for model training? Anthropic In 3 answers
  15. Voice injection means swapping generic claims for things only you could say. foundera.co Article · How Founders Use AI Founder Voice in the AI Era: Don't Sound Like AI Foundera In 3 answers
  16. The clipping workflow: one 30-minute video into 10-20 ranked shorts. opus.pro Guide · How Founders Use AI How to Turn Long-Form Videos into YouTube Shorts at Scale OpusClip In 3 answers
  17. The written breakdown of his 60M-views-a-month avatar pipeline. sigmastory.in Article · How Founders Use AI How AI Creator Varun Mayya Has Automated Video Making Using Digital Avatars SigmaStory In 3 answers
  18. The report that settled it: prompts alone do not create ownership. copyright.gov Guide · How Founders Use AI Copyright and AI, Part 2: Copyrightability (Full Report) US Copyright Office In 3 answers
  19. Primary source on GPTBot vs OAI-SearchBot vs ChatGPT-User, so you allow search and control training separately. developers.openai.com Guide · How Founders Use AI Overview of OpenAI Crawlers (official docs) OpenAI In 3 answers
  20. Battle-tested prompts covering the full arc from ICP research to first-touch drafting. blog.hubspot.com Article · How Founders Use AI ChatGPT for sales prospecting: 10 prompts from research to outreach HubSpot In 3 answers
  21. The most complete practitioner guide to authentication, warmup, and volume pacing. smartlead.ai Guide · How Founders Use AI Email Deliverability Guide: SPF, DKIM, Warmup & Everything That Gets You to the Inbox Smartlead In 3 answers
  22. Two of SaaS's sharpest voices on which sales admin AI genuinely takes off your plate. saastr.com Article · How Founders Use AI Jason + Lenny: the real future of AI in sales SaaStr In 3 answers
  23. Anthropic's starting page for prompting, ordered from the most to the least effective techniques. platform.claude.com Guide · How Founders Use AI Prompt engineering overview (Claude docs) Anthropic In 3 answers
  24. The definitive reference on how project files, project-level instructions, and project memory actually behave, worth skimming... help.openai.com Guide · How Founders Use AI Projects in ChatGPT (official help guide) OpenAI Help Center In 3 answers

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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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