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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. Covers the hard problem: deleting a user whose data is baked into model weights. khuranaandkhurana.com Article · How Founders Use AI AI Training Data under India's DPDP Regime Khurana and Khurana (India)
  2. An independent plain-English summary to cross-check the official policies. meetily.ai Article · How Founders Use AI OpenAI Data Retention Policy: Does OpenAI Train on Your API Data? Meetily
  3. Compares training and retention defaults across providers in one table. spartner.software Article · How Founders Use AI LLM and data privacy: are they training on your data? Spartner
  4. The fast version of the OWASP list for a founder who needs the gist today. mend.io Article · How Founders Use AI OWASP Top 10 for LLM Applications: A Quick Guide Mend.io
  5. The most complete framework for choosing between seat, usage, and outcome models. bvp.com Guide · How Founders Use AI The AI pricing and monetization playbook Bessemer Venture Partners
  6. Real pricing pages of 40 AI startups decoded; pattern-match instead of guessing. growthunhinged.com Article · How Founders Use AI The state of AI pricing at 40 leading startups Kyle Poyar (Growth Unhinged)
  7. The trend data: 2 in 5 software companies now run hybrid subscription-plus-credits pricing. growthunhinged.com Article · How Founders Use AI What's changing with AI monetization Kyle Poyar (Growth Unhinged)
  8. Proof that nobody's pricing is final: 3.6 changes per company among the top 500. substack.com Thread · How Founders Use AI 1,800 pricing changes in 2025 Kyle Poyar
  9. Walks each pricing model with named examples and when each fits. getmonetizely.com Article · How Founders Use AI How to Price AI Services: Models, Examples, and Strategy Monetizely
  10. The margin argument for charging on results instead of marking up tokens. hirefraction.com Article · How Founders Use AI AI Is Killing SaaS Margins. Outcome-Based Pricing Is How You Get Them Back. Fraction
  11. A reframe that changes pricing decisions: treat compute as growth investment, not just COGS. saastr.com Article · How Founders Use AI Inference is the New Sales and Marketing Spend SaaStr
  12. What happens to margins if you keep SaaS pricing on AI costs, with the numbers. saasmag.com Article · How Founders Use AI The AI COGS Problem: SaaS Gross Margin Compression SaaS Mag
  13. The single best ongoing feed to follow as AI pricing norms keep shifting. growthunhinged.com Guide · How Founders Use AI Growth Unhinged: pricing archive Kyle Poyar
  14. A jargon-free primer on what you should be recording and why. langfuse.com Article · How Founders Use AI What is LLM Observability and Monitoring? Langfuse
  15. A follow-along tutorial that gets tracing live in your app quickly. towardsdatascience.com Guide · How Founders Use AI LLM Monitoring and Observability: Hands-on with Langfuse Towards Data Science
  16. A current comparison so you choose once instead of migrating later. confident-ai.com Article · How Founders Use AI Top 7 LLM Observability Tools Confident AI
  17. Explains traces, spans, and generations with the main tools side by side. langflow.org Article · How Founders Use AI LLM Observability Explained (Langfuse, LangSmith, LangWatch) Langflow
  18. The operations chapter: daily habits of teams that keep LLM features healthy in production. oreilly.com Article · How Founders Use AI What We Learned from a Year of Building with LLMs (Part II): Operations Eugene Yan, Hamel Husain, et al.
  19. A menu of AI-specific metrics beyond DAUs, from acceptance rate to cost per active user. mixpanel.com Article · How Founders Use AI 30+ AI product metrics to track today Mixpanel
  20. Includes the killer diagnostic: compare AI-user retention curves against your product baseline. institutepm.com Guide · How Founders Use AI AI Product Metrics That Actually Matter Institute of Product Management
  21. Connects AI feature metrics to the board-level numbers investors ask about. thesaasbarometer.substack.com Article · How Founders Use AI AI Metrics that Matter in 2025 SaaS Barometer
  22. A setup-to-dashboards walkthrough for self-hosting the free stack. prismix.dev Guide · How Founders Use AI Langfuse Guide: Open-Source LLM Observability and Tracing Prismix
  23. An India-based engineering firm's field guide to the metrics and tooling that matter. cloudraft.io Article · How Founders Use AI LLM Observability: Monitoring Large Language Models CloudRaft (India)
  24. Monitoring and optimization together, from an India-founded AI quality platform. getmaxim.ai Article · How Founders Use AI How to Reduce LLM Cost and Latency: A Practical Guide for Production AI Maxim AI (India)

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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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