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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. Drag-and-drop lifestyle scenes around your product for ads and social. flair.ai Tool · How Founders Use AI Flair.ai: AI product photo generator Flair
  2. The most complete logo-plus-brand-kit generator, with vector files and licensing handled. looka.com Tool · How Founders Use AI Looka: logo design and brand identity for entrepreneurs Looka
  3. Free prompt-to-logo that flows straight into a brand kit you will actually use. canva.com Tool · How Founders Use AI Canva free AI logo generator Canva
  4. The tool that gets you a real vector SVG, which printers and app stores need. recraft.ai Tool · How Founders Use AI Recraft AI logo generator Recraft
  5. The most popular TypeScript toolkit for streaming AI features, with 25+ providers behind one API. github.com Tool · How Founders Use AI Vercel AI SDK Vercel
  6. 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
  7. 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
  8. 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
  9. The independent standard for comparing intelligence, speed, and price on one chart. artificialanalysis.ai Tool · How Founders Use AI LLM Leaderboard: Comparison of over 100 AI models Artificial Analysis
  10. Continuously updated rankings pulled straight from provider APIs; good second opinion. llm-stats.com Tool · How Founders Use AI LLM Stats: Compare 300+ models by intelligence, speed, price LLM Stats
  11. Product-builder-oriented leaderboard that maps benchmark scores to practical use cases. vellum.ai Tool · How Founders Use AI Vellum LLM Leaderboard Vellum
  12. Fastest way to sanity-check what any model actually costs before you wire it in. pricepertoken.com Tool · How Founders Use AI Price Per Token leaderboards Price Per Token
  13. Open-source, config-file evals that run in CI; used by OpenAI and Anthropic themselves. github.com Tool · How Founders Use AI Promptfoo Promptfoo
  14. Validate and auto-retry model outputs against a schema; 6M downloads a month for a reason. github.com Tool · How Founders Use AI Instructor: structured outputs for LLMs Jason Liu (567 Labs)
  15. Open-source programmable rails: topic control, fact-checking, and jailbreak detection. github.com Tool · How Founders Use AI NeMo Guardrails NVIDIA
  16. A hub of pre-built validators that intercept bad inputs and outputs before users see them. github.com Tool · How Founders Use AI Guardrails AI Guardrails AI
  17. Automatically probe your own app for injection and PII leaks before attackers do. promptfoo.dev Tool · How Founders Use AI OWASP LLM Top 10 red-teaming with Promptfoo Promptfoo
  18. The leading open-source LLM observability platform: traces, costs, evals, and prompt management. langfuse.com Tool · How Founders Use AI Langfuse Langfuse
  19. The managed alternative, strongest if you already build on LangChain. langchain.com Tool · How Founders Use AI LangSmith Observability LangChain
  20. A living library of proven deep research prompts across OpenAI, Gemini and Qwen. github.com Tool · How Founders Use AI awesome-deep-research-prompts (GitHub) LangGPT community
  21. Categorizes why people got caught (time pressure, lack of training), a mirror for your own habits. naturalandartificiallaw.com Tool · How Founders Use AI AI Hallucination Cases Tracker (international) Natural & Artificial Law
  22. The underlying repo with papers, notebooks and lessons for going deeper. github.com Tool · How Founders Use AI dair-ai/Prompt-Engineering-Guide (GitHub) DAIR.AI
  23. Type a product URL, get a structured competitor matrix in minutes; a fast first pass. competely.ai Tool · How Founders Use AI Competely: Instant AI competitive analysis Competely
  24. A free-to-start tool built specifically for solo founders' competitor scans. founderpal.ai Tool · How Founders Use AI AI Competitor Analysis for Busy Founders FounderPal

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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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