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. A tested map of AI tools by job (chatbots, automation, search, content, meetings) to fill in once the first three jobs work. zapier.com Article · How Founders Use AI The best AI productivity tools in 2026 Zapier In 2 answers
  2. Google's steps to make Gemini your Android assistant (Google app as default assist app, then power button or 'Hey Google'), and... support.google.com Guide · How Founders Use AI Get started with the Gemini mobile app Google Gemini Help In 2 answers
  3. How to add, upload or type subtitles for your own video in YouTube Studio, the step after automatic captions have been generated. support.google.com Article · How Founders Use AI Add subtitles and captions YouTube Help In 2 answers
  4. OpenAI's own page: documents and images upload on every plan, but audio uploads are for paid plans only, with files up to 512 MB. help.openai.com Article · How Founders Use AI Uploading files and audio to ChatGPT OpenAI Help Center In 2 answers
  5. Apple's steps for typing into form fields, adding a text box when a form will not take typing, and creating a signature with... support.apple.com Article · How Founders Use AI Fill out and sign PDF forms in Preview on Mac Apple Support In 2 answers
  6. Says plainly that Preview cannot edit a PDF's existing text, and lists its markup tools, including Redaction Selection for... support.apple.com Article · How Founders Use AI Annotate a PDF in Preview on Mac Apple Support In 2 answers
  7. Apple's steps to trim a clip in Photos and save it as a new clip so the original stays, plus speed and audio edits. support.apple.com Article · How Founders Use AI Trim video length, adjust speed, and edit audio on iPhone Apple Support In 2 answers
  8. Google's steps for Open with Google Docs, the 2 MB file limit, and what formatting survives; the language list includes Hindi,... support.google.com Article · How Founders Use AI Convert PDF and photo files to text Google Drive Help In 2 answers
  9. How Google's invisible watermark is added to AI images and video and is designed to stand up to cropping, filters and compression. deepmind.google Article · How Founders Use AI Google SynthID Google DeepMind In 2 answers
  10. Apple's Preview app on iPhone, which opens, scans and edits pages of PDFs. support.apple.com Article · How Founders Use AI Scan text and documents in Preview on iPhone Apple Support In 2 answers
  11. Hands-on picks with prices: Teal for tracking many applications (free, paid from $13 a week), Resume.io, Kickresume, Resume... zapier.com Article · How Founders Use AI The 6 best AI resume builders in 2026 Zapier (Miguel Rebelo) In 2 answers
  12. Directly answers the scoping question non-technical founders wrestle with, build in-house vs. outsource, backed by patterns... YC Startup Library Article · ~10 min read · Starting Up Does Your Tech Startup Really Need a Technical Co-Founder? (Yes) Y Combinator
  13. The canonical PM-community reference on choosing what to build next, from the most-read product newsletter. A pragmatic... Lenny's Newsletter Article · ~15 min read · Starting Up Prioritizing Lenny Rachitsky
  14. A rare, concrete breakdown of the operating rhythm high-velocity product teams use to ship and iterate consistently. Useful... Reforge Article · ~18 min read · Starting Up Rethinking Your Operating Cadence Fareed Mosavat & Casey Winters
  15. The best-known framework for structuring a message as a story where the customer is the hero, practical templates you can apply... Amazon / HarperCollins Leadership Book · Book (~240 pages) · Starting Up Building a StoryBrand: Clarify Your Message So Customers Will Listen Donald Miller
  16. Watching a pro rewrite real, messy landing pages teaches copywriting faster than any theory, free, concrete, before-and-after... Marketing Examples Article · 10 min read · Starting Up Landing page rewrites with a pro copywriter Harry Dry & Annie Maguire
  17. The official companion site for Traction, summarizing the Bullseye framework for founders who want the method without reading... Traction (companion resource) Article · ~10 min read · Starting Up How to plan and test distribution channels (Bullseye method) DuckDuckGo / Gabriel Weinberg
  18. The most influential framework for why growth feels effortless for some companies and impossible for others; essential reading... brianbalfour.com Article · Multi-part essay series · Starting Up Four Fits for $100M+ Growth Brian Balfour
  19. The practitioner's manual for running a high-tempo growth process, testing acquisition, activation, retention and referral,... Currency / Penguin Random House Book · Book (~320 pages) · Starting Up Hacking Growth Sean Ellis & Morgan Brown
  20. A grounded look at how Indian D2C brands handle acquisition, rising CACs, social commerce and repeat purchase, with real... Inc42 Article · ~15 min read (playbook intro) · Starting Up Inside India's D2C Rush (Inc42+ Playbook) Inc42 Team
  21. The definitive India-focused profile of Zoho's decades-long bootstrapping journey, told through Sridhar Vembu's decisions.... yourstory.com Article · long-form article · Starting Up The Turning Point: How Sridhar Vembu-led Zoho Bootstrapped to a Global SaaS Giant YourStory
  22. Stripe's founder guides are clean, trustworthy primers on the core financial concepts every founder must track, burn, runway,... stripe.com Article · guide library · Starting Up Startup Financials: Burn Rate & Runway, Stripe / Founder Guides Stripe
  23. Crowd-sourced, battle-tested tactics from Lenny's operator community specifically for the solo-founder procrastination problem,... lennysnewsletter.com Article · medium · Starting Up Community Wisdom: Beating the Solo-Founder Procrastination Trap Lenny Rachitsky
  24. A clear, regularly-updated Indian explainer that maps the practical, sector-agnostic registrations most founders hit first,... ClearTax Article · ~12 min read · Starting Up Licenses & Registrations Required to Start a Business in India ClearTax

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