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. Video · How Founders Use AI 10x Your Marketing With These AI Workflows Kieran Flanagan (HubSpot)
  2. Feed it a YouTube link or PDF, get platform-specific drafts everywhere. blotato.com Tool · How Founders Use AI Blotato Sabrina Ramonov
  3. The voice-as-a-file method from LinkedIn's biggest AI-writing creator. ruben.substack.com Article · How Founders Use AI I Am Just a Text File Ruben Hassid
  4. A copy-paste interview prompt that extracts your voice into a reusable .md file. linkedin.com Thread · How Founders Use AI How to Make AI Write (Exactly) Like You Ruben Hassid
  5. Set up a Claude skill trained only on your best posts, then improve it weekly. ruben.substack.com Guide · How Founders Use AI Claude + LinkedIn Ruben Hassid
  6. The cleanest step-by-step for custom instructions and sample-based training. zapier.com Guide · How Founders Use AI How to Train ChatGPT to Write Like You Zapier
  7. Compress your voice into a portable block that works in any model. promptsdaily.substack.com Article · How Founders Use AI Voice Pattern Prompts: How I Get AI to Write in My Voice From the First Message Prompts Daily
  8. Extracts specific patterns, not vague adjectives, from your samples. aiprompthackers.com Article · How Founders Use AI 8 Prompts That Teach AI Your Writing Voice Without a Style Guide AI Prompt Hackers
  9. A simple three-file setup (voice, audience, output) that travels between chats. donbarger.com Article · How Founders Use AI Give Claude Your Voice: The Three-File Writing System Don Barger
  10. Upload 8 samples and get a managed, team-wide brand voice layer. jasper.ai Tool · How Founders Use AI Jasper Brand Voice Jasper
  11. Video · How Founders Use AI The Ultimate Guide to Brand Voice on Jasper AI Jasper community
  12. Paste 3,000 words of your writing, get a selectable voice in every chat. copy.ai Tool · How Founders Use AI Brand Voice by Copy.ai Copy.ai (now part of Fullcast)
  13. Keep ideas and voice yours, use AI for speed, polish, and scale. mattgiaro.com Article · How Founders Use AI Writing (And Creating) Content With AI Matt Giaro
  14. Counterintuitive but right: train AI on your published output, not raw notes. mattgiaro.substack.com Article · How Founders Use AI Why I Stopped Training AI on My Notes (And What I Do Instead) Matt Giaro
  15. Voice-true threads: what to feed the model and what to rewrite yourself. mattgiaro.com Article · How Founders Use AI How to Write X Threads with AI (Without Sounding Like a Robot) Matt Giaro
  16. Structured course on making AI your digital writing assistant, voice included. startwritingwithai.com Course · How Founders Use AI Start Writing With ChatGPT Nicolas Cole & Dickie Bush
  17. Feed a craft book to AI and turn it into a personal writing meta prompt. x.com Thread · How Founders Use AI Dan Koe on feeding books to AI as voice and craft context Dan Koe
  18. Video · How Founders Use AI Nicolas Cole on Writing With AI & Limiting Beliefs of Writers Future of Learning & Work Podcast
  19. A LinkedIn post generator trained on proven posts, not generic internet text. easygen.io Tool · How Founders Use AI EasyGen Ruben Hassid
  20. What 100M LinkedIn views taught him about AI-assisted posting. ruben.substack.com Article · How Founders Use AI 1,000,000 Ruben Hassid
  21. His ghostwriter-to-creator system, explained for beginners. theaireport.ai Article · How Founders Use AI How to Use AI to Grow on LinkedIn with Ruben Hassid AI Tool Report
  22. He shows the actual prompts behind posts people assume are hand-written. linkedin.com Thread · How Founders Use AI How to Create Viral LinkedIn Posts with AI Ruben Hassid
  23. The psychology that separates magnetic founder content from cringe. linkedin.com Thread · How Founders Use AI 6 Psychological Personal Branding Hacks Lara Acosta
  24. Storytelling and networking tactics that AI can amplify but not replace. creators.spotify.com Podcast · How Founders Use AI Lara Acosta: How to Get Unstuck Using LinkedIn The Gaming Playbook

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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