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. Anthropic's scores for Claude in Hindi, Bengali and other languages against English, with three tips: name the languages, use... platform.claude.com Guide · How Founders Use AI Multilingual support Anthropic In 4 answers
  2. Sarvam's own account of its two open models, how it tests 22 languages in native and English-letter script, and why its... sarvam.ai Article · How Founders Use AI Open-sourcing Sarvam 30B & 105B models Sarvam AI In 4 answers
  3. How to upload a photo of a space and ask Gemini to change it in plain words, free in the Gemini app. support.google.com Guide · How Founders Use AI Generate and edit images with Gemini Apps Google In 4 answers
  4. The report that named CapCut among the 47 apps India banned in July 2020, which is why it is not an option here. inc42.com Article · How Founders Use AI Xiaomi Browser, ByteDance's CapCut among 47 Chinese apps banned by India Inc42 In 4 answers
  5. A hands-on roundup updated 14 October 2026 that names the best general chatbot, the best for writing and coding, and the best... zapier.com Article · How Founders Use AI The best AI chatbots in 2026 Zapier In 4 answers
  6. Google's own page on what is free: 50 Flow credits a day for every account, 10 credits for an 8-second Veo 3.1 Lite clip, the... support.google.com Guide · How Founders Use AI Manage your Google Flow credits Google In 4 answers
  7. Anthropic's free course on using Claude for everyday work: first conversations, getting better results, projects, artifacts,... anthropic.skilljar.com Course · How Founders Use AI Claude 101 Anthropic Academy In 4 answers
  8. Covers opening a PDF in Word to get an editable copy (File > Open) and saving it back as a PDF, with options for file size and... support.microsoft.com Article · How Founders Use AI Save or convert to PDF in Office desktop apps Microsoft Support In 4 answers
  9. States that every file processed on iLovePDF is deleted automatically within two hours, and that signed documents are kept... ilovepdf.com Article · How Founders Use AI iLovePDF security iLovePDF In 4 answers
  10. How to trim a video in the Windows Photos app (Ctrl+E), and where to open it in Clipchamp for fuller edits. support.microsoft.com Article · How Founders Use AI Edit photos and videos in Windows Microsoft Support In 4 answers
  11. A grounded India-specific feature with hard-won lessons from BigBasket, Razorpay, BrowserStack and Instamojo on understanding... Inc42 Article · ~15 min read · Starting Up Defining, Measuring And Solving Product-Market Fit Puzzle For Startups Inc42 In 3 answers
  12. A PM-turned-founder's playbook that treats defining the right customer and problem as a sequence of concrete hurdles, not... First Round Review Article · ~18 min read · Starting Up 8 Product Hurdles Every Founder Must Clear First Round Review In 3 answers
  13. A high-signal, battle-tested framework for evaluating engineering talent from a leader who's done it hundreds of times.... First Round Review Article · ~20 min read · Starting Up My Lessons from Interviewing 400+ Engineers Over Three Startups Marco Rogers In 3 answers
  14. A crisp, visual reference of the psychology principles behind good UX, perfect for a founder who wants the 'why' without a... lawsofux.com Article · reference site · Starting Up Laws of UX Jon Yablonski In 3 answers
  15. A tight, example-driven breakdown of naming approaches from one of the best practical marketing writers online, memorable and... Marketing Examples Article · 5 min read · Starting Up Four (not boring) ways to name a new product Harry Dry In 3 answers
  16. A landmark Indian example of content-led growth, Zerodha built trust and a huge audience by teaching in public for free. The... Zerodha Varsity Article · Resource hub · Starting Up Varsity by Zerodha, learn to build an audience by teaching Zerodha In 3 answers
  17. Fifty-plus recent YC founders answer the exact question every early founder asks. The pattern across their answers is the lesson. YC Startup Library Article · ~10 min read · Starting Up Founder FAQ: How did you get your first customer? Y Combinator (50+ founders) In 3 answers
  18. A candid Q&A where a top sales founder answers real early-founder questions on outreach, persistence, and closing.... Stripe Atlas Guides Article · ~15 min read · Starting Up AMA with Steli Efti (Stripe Atlas) Steli Efti / Stripe Atlas In 3 answers
  19. The canonical explanation of why linear funnels break and self-reinforcing growth loops compound, from the team that trains... Reforge Blog Article · ~15 min read · Starting Up Growth Loops Are the New Funnels Brian Balfour & Reforge team In 3 answers
  20. The canonical book on making community a competitive advantage, from someone who trained community teams at Facebook, Airbnb,... Wiley Book · Book (~256 pages) · Starting Up The Business of Belonging David Spinks In 3 answers
  21. YC's Startup Library is the canonical, no-fluff reference on how startups actually make money, curated from partners who've... ycombinator.com Article · browsable library · Starting Up Business Models & Metrics, Y Combinator Startup Library Y Combinator In 3 answers
  22. A practical India-specific guide to term sheets and iSAFEs, written by working Indian VCs and startup lawyers (3one4 Capital,... Inc42 Article · 30 min read (guide) · Starting Up Decoding Term Sheets for Early-Stage Startups Siddarth Pai, Roma Priya, Yagnesh Sanghrajka In 3 answers
  23. A concrete, tactical guide to presenting yourself well to potential co-founders, useful whether or not you use YC's platform.... YC Startup Library Article · Short read · Starting Up How to make your co-founder matching profile stand out Y Combinator In 3 answers
  24. A clear, vendor-agnostic explainer of why the Delaware C-corp is the default for high-growth, investor-backed startups and how... stripe.com/resources Article · Guide · Starting Up How to form a Delaware corporation (C corp), Stripe guide Stripe In 3 answers

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