Every resource founders actually use, in one library.

What founders use most, ranked by how many answers lean on it.

1. A production-ready open-source chatbot with auth and persistence; fork it instead of starting from zero. github.com Tool · How Founders Use AI Vercel AI Chatbot template Vercel
2. Six practitioners condense a year of production LLM scar tissue into tactical advice. oreilly.com Article · How Founders Use AI What We Learned from a Year of Building with LLMs (Part I) Eugene Yan, Hamel Husain, Jason Liu, Shreya Shankar, et al.
3. The whole LLM-product stack in one thread; a map of every decision you will eventually face. x.com Thread · How Founders Use AI Patterns for LLM systems: evals, RAG, fine-tuning, caching, guardrails Eugene Yan (Anthropic)
4. The most-read O'Reilly book of 2025; the reference text once you outgrow tutorials. oreilly.com Guide · How Founders Use AI AI Engineering: Building Applications with Foundation Models Chip Huyen
5. An India-based walkthrough from API key to working app, aimed at non-ML developers. analyticsvidhya.com Guide · How Founders Use AI Build Your First LLM Application: A Beginner's Tutorial Analytics Vidhya
6. The gentlest possible on-ramp if your team writes Python but has never called a model API. machinelearningmastery.com Guide · How Founders Use AI Your First OpenAI API Project in Python, Step-By-Step Machine Learning Mastery
7. A CPO livebuilds a real feature with AI tools, showing how fast the idea-to-ship loop has become. creatoreconomy.so Article · How Founders Use AI From Idea to Product in 30 Min Using AI Agents | Claire Vo Peter Yang (Creator Economy) with Claire Vo
8. The default podcast of people who ship AI features for a living; subscribe and skim show notes. latent.space Podcast · How Founders Use AI Latent Space: The AI Engineer Podcast swyx and Alessio Fanelli
9. Cached reads cost 10% of normal input price; the single highest-leverage cost lever, from the primary source. platform.claude.com Guide · How Founders Use AI Prompt caching (Claude docs) Anthropic
10. A flat 50% discount for anything that can wait up to 24 hours, like digests, enrichment, and backfills. developers.openai.com Guide · How Founders Use AI Batch API (OpenAI docs) OpenAI
11. Grounded numbers on what AI COGS actually look like across real startups, not vibes. tanayj.com Article · How Founders Use AI The State of AI Gross Margins in 2025 Tanay Jaipuria (Wing VC)
12. Fresh survey data showing margins improving from 41% to 45% and what the improvers did differently. upstartsmedia.com Article · How Founders Use AI Exclusive Data: Startups Are Learning What AI Profits Look Like Upstarts Media
13. Routing, compaction, prompt trims, caching, batching: each lever quantified so you know what to do first. morphllm.com Article · How Founders Use AI LLM Cost Optimization: 5 Levers to Cut API Spend 70-85% Morph
14. Engineering-level detail on token budgets and semantic caching from an infra company that measures it. redis.io Article · How Founders Use AI LLM Token Optimization: Cut Costs and Latency Redis
15. Diagram-first explanations your whole team can absorb in ten minutes. pub.towardsai.net Article · How Founders Use AI 8 LLM Cost Optimization Techniques, Visually Explained Divy Yadav (Towards AI)
16. A gateway gives you routing, fallbacks, and spend visibility in one move; this compares the options. helicone.ai Article · How Founders Use AI Top 5 LLM Gateways in 2025 Helicone
17. Practical recipes for attributing AI spend per user and per feature, which is how you find the leaks. docs.helicone.ai Tool · How Founders Use AI Helicone cost tracking cookbook Helicone
18. Live price, speed, and latency comparison across 500+ endpoints; check before you commit spend. artificialanalysis.ai Tool · How Founders Use AI LLM API Providers Leaderboard Artificial Analysis
19. A sober side-by-side of per-token prices across the big three, including budget tiers. intuitionlabs.ai Article · How Founders Use AI LLM API Pricing Comparison (2025): OpenAI, Gemini, Claude IntuitionLabs
20. A builder's receipts: one technique, a 90% real bill reduction, with the code that did it. medium.com Article · How Founders Use AI Prompt Caching is a Must: From $720 to $72 Monthly Du'An Lightfoot
21. Actual production numbers for agent workloads, the costliest and least predictable AI feature type. medium.com Article · How Founders Use AI The Unit Economics of AI Agents: Budgeting LLM Costs with Real Numbers Nikhil Sood
22. Understand your supplier's economics to predict where API prices go next. exponentialview.co Article · How Founders Use AI X-raying OpenAI's unit economics Azeem Azhar (Exponential View)
23. A strategic view of vendor pricing games and how buyers should respond. cxotalk.com Podcast · How Founders Use AI Inside the AI Arms Race: LLMs, Economics, and Strategy CXOTalk with Nate B. Jones
24. Willison narrates the price collapse and capability gains in one listenable year-in-review. latent.space Podcast · How Founders Use AI Simon Willison: Things we learned about LLMs in 2024 (Latent Space) Latent Space with Simon Willison

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