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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. A build-it-yourself option for technical founders who want raw answer data on a cron job. apify.com Tool · How Founders Use AI AI Brand Monitor (Apify actor) Apify community
  2. Free trend data on AI visibility across industries, good for calibrating expectations. hubspot.com Tool · How Founders Use AI HubSpot AI Search Sensor HubSpot
  3. An ecommerce SaaS's practical evaluation of monitoring tools for consumer brands. yotpo.com Article · How Founders Use AI 15 Best LLM Monitoring Tools for Brand Visibility Yotpo
  4. Explains why citation tracking beats mention counting when you want to know what to fix. signal-ai.com Article · How Founders Use AI A Better Way to Track LLM Brand Mentions with AI Citations Signal AI
  5. Context on the enterprise end of the market so you know what you are (not yet) paying for. lsvp.com Article · How Founders Use AI Profound: Building the Marketing Command Center for the AI Era Lightspeed Venture Partners
  6. Defines the share-of-voice metric and realistic benchmarks for a young brand. maxaeo.ai Article · How Founders Use AI ChatGPT Share of Voice: How to Measure, Benchmark, and Improve It MaxAEO
  7. A seven-step audit built around buyer questions, not vanity name-checks. orr-consulting.com Guide · How Founders Use AI How to Audit Your AI Visibility: A Founder's Field Guide Orr Consulting
  8. HubSpot's CMO and growth lead demo and debate AI visibility measurement on air. podcasts.apple.com Podcast · How Founders Use AI Marketing Against The Grain (AEO tooling episodes) Kipp Bodnar & Kieran Flanagan (HubSpot)
  9. A YC-backed take on GEO tooling from ex-Google Search PMs, worth watching as the space matures. ycombinator.com Article · How Founders Use AI Launch YC: AthenaHQ, Get Your Brand Discovered on ChatGPT AthenaHQ (Y Combinator)
  10. Large-scale evidence that mentions and citations are different things, and how each is earned. semrush.com Article · How Founders Use AI How AI Search Really Works: Findings from Our AI Visibility Study Semrush
  11. Shows even one assistant cites differently by mode, so you must test prompts, not assume. semrush.com Article · How Founders Use AI Only 25% of cited sources overlap between ChatGPT's reasoning modes Semrush
  12. 3.7M citations analyzed: 91% of cited URLs appear in only one engine, which changes your whole strategy. growth-memo.com Article · How Founders Use AI The Consensus Gap Kevin Indig (Growth Memo)
  13. Video · How Founders Use AI How AI Search Engines Work (Ahrefs AEO Course 1.1) Ahrefs (Sam Oh)
  14. Video · How Founders Use AI How Ranking in Google AI Overviews, ChatGPT, and Perplexity Differ (Ahrefs AEO Course 1.2) Ahrefs (Sam Oh)
  15. Reputation specialists explain the authority and extractability signals engines reward. fiveblocks.com Article · How Founders Use AI How do AI-powered search engines like Perplexity rank and cite sources? Five Blocks
  16. Primary source on how ChatGPT rewrites queries and picks sources when it searches the web. help.openai.com Guide · How Founders Use AI ChatGPT Search (official help article) OpenAI
  17. The Perplexity founder explains RAG and citations in his own words, straight from the source. open.spotify.com Podcast · How Founders Use AI Aravind Srinivas: Perplexity CEO on the Future of AI, Search & the Internet Lex Fridman Podcast / Aravind Srinivas
  18. Original research on 31k keywords showing what answer engines actually cite versus what ranks. graphite.io Article · How Founders Use AI AI Content In Search & LLMs Graphite
  19. A quarter-million responses analyzed to show where models' brand opinions actually come from. seerinteractive.com Article · How Founders Use AI The GEO Olympics Study: What 231,347 LLM Responses Reveal About AI Brand Visibility Seer Interactive
  20. A plain-language walkthrough of the founding research if you skip the arXiv PDF. thegeocommunity.com Article · How Founders Use AI The Original GEO Paper: Princeton & IIT Delhi Study Findings Explained The GEO Community
  21. How the leading AI visibility platform frames retrieval, understanding, and citation mechanics. tryprofound.com Article · How Founders Use AI What is answer engine optimization (AEO)? Profound
  22. Separates training-data representation from live retrieval, the distinction most founders miss. ultrascout.ai Article · How Founders Use AI How Does ChatGPT Decide Which Brands to Recommend? UltraScout
  23. Digs into Perplexity's curated authority lists and freshness weighting. datastudios.org Article · How Founders Use AI How Does Perplexity Choose and Rank Its Information Sources? Data Studios
  24. Actionable list of the signals that get a page through Perplexity's reranking filters. keyword.com Guide · How Founders Use AI Perplexity AI ranking factors: A guide for SEOs Keyword.com

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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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