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 law-firm-authored piece that reads results the way an examiner or opposing counsel would, useful once you're past basic... Lexology Article · D2C How to Use IPIndia Public Search for Easy Trademark Checking Lexology
  2. The definitive D2C-specific breakdown of the CAC you should actually track: new-customer CAC vs blended CAC, why the gap... 1800dtc.com Article · D2C How to Calculate D2C CAC: Formulas for New & Blended 1-800-D2C
  3. A clean beginner-level explainer of what DTC fulfillment actually involves day-to-day, useful as a first orientation before... eFulfillmentService Blog Article · D2C DTC Fulfillment: What It Means & How to Choose a 3PL eFulfillment Service
  4. Even if you're building in India, seeing how two of the biggest global 3PLs differentiate (network size vs... ShipCalm Blog Article · D2C ShipBob vs ShipMonk (vs ShipCalm): A Complete Comparison in 2026 ShipCalm
  5. From the fulfillment arm of India's most-used shipping platform, a practical guide to what D2C-specific fulfillment (versus... Shiprocket Fulfillment Blog Article · D2C The Ultimate D2C eCommerce Fulfillment Guide Shiprocket Fulfillment
  6. An independent business-press look (not vendor marketing) at how India's 3PL fulfillment market is developing alongside D2C... Inc42 Article · D2C How Shiprocket Fulfillment Empowers D2C Brands To Stay Agile And Competitive In An $88 Bn Ecommerce Market Inc42
  7. A short, no-hype reference on building a coherent product line, research trends, fulfil a unique need, target a demographic,... Shopify Help Center Article · D2C Choosing products to sell (Shopify Help Center) Shopify
  8. The best argument we found for launching with one hero SKU instead of a sprawling catalog, it shows how brands dilute... Triple Whale Blog Article · D2C Why Your Hero Products Should Be the Atomic Unit of Your Business Triple Whale (with Nate Poulin, Feat)
  9. Web Smith of 2PM is one of the sharpest voices on how DTC brands survive in an Amazon-dominated world, and this piece distills... ShipBob Blog Article · D2C The DTC Success Formula: Building a Brand [with Web Smith] Web Smith (2PM) via ShipBob
  10. Real category data from 1,000+ Indian D2C applicants rather than opinion, beauty & personal care, F&B, and fashion dominate the... Inc42 Report · D2C The State Of India's D2C Brands: Findings From The Hunt For India's Fastest-Growing D2C Brands Inc42 (FAST42, with Shiprocket)
  11. Fireside's Kanwaljit Singh has backed Mamaearth, boAt, Yoga Bar and Vahdam, so his read on where headroom remains, ayurveda,... Forbes India Article · D2C You Can Still Build Many Hundreds, If Not Thousands, Of Brands In India: Kanwaljit Singh Kanwaljit Singh (Fireside Ventures) via Forbes India
  12. A regularly updated read on what's actually growing in search and sales, useful as a demand signal and idea starter, with the... Shopify Blog Article · D2C 20 Trending Products and Things To Sell Online (2026) Shopify Editorial
  13. A second independent perspective on the India WhatsApp tool landscape from a competing vendor, useful for cross-checking claims... Zoko Article · D2C Best WhatsApp Marketing Services in India 2025 Zoko
  14. The most direct plain English answer to this exact question, written by a payments company that sees the problem from both... Cashfree Article · D2C Do You Need GST to Sell Online in India? Rules, Limits & TCS Explained Cashfree Payments
  15. Answers the practical follow up question a founder hits right after GST: can I even take payments without one. Written by a... PhonePe Business Article · D2C Payment Gateway Without GST: Can You Accept Online Payments? PhonePe
  16. Spells out the actual cost of treating GST as optional: the penalty math under Section 122, the 18% interest clock, and the... Masters India Article · D2C Penalty for Not Registering or Late Registering Under GST Masters India
  17. Written by a payment company that onboards thousands of small sellers, so it frames GST registration around the real founder... Razorpay Learn Article · D2C GST Registration for Small Business - Minimum Turnover, New Rules & Benefits Razorpay
  18. The clearest global explainer of economic nexus, the international equivalent of India's e-commerce mandate: the idea that... Stripe Article · D2C Introduction to US Sales Tax and Economic Nexus Stripe
  19. Shopify's own 2026 guide to US sales tax makes the same core point GST does for India: the platform will not register or remit... Shopify Article · D2C Ecommerce Sales Tax: Complete Guide for US Businesses (2026) Shopify
  20. A tax compliance vendor's FAQ that lays out registration timing cleanly: register before you start selling in a jurisdiction,... Avalara Report · D2C Sales Tax Registration FAQ Avalara
  21. If a D2C brand ever ships direct to Europe, this explains the EU's equivalent to India's threshold question: a EUR 10,000 cross... amavat Article · D2C VAT OSS Threshold Explained: What Happens After EUR 10,000 amavat
  22. The global founder community version of the exact question in this brief: whether to formalise before revenue or wait, useful... Indie Hackers Thread · D2C You Don't Need an LLC... Yet. How and When to Form a Business Entity Indie Hackers
  23. Explains the newest fast track (effective November 2025, Notification 18/2025) that most CA firm websites have not caught up... TaxGuru Report · D2C All About New GST Registration Rule 14A: 3-Day Auto Approval TaxGuru
  24. Razorpay writes this for the same founders opening a payment gateway account right after GST registration, so the document set... Razorpay Learn Article · D2C Documents Required for GST Registration: A Checklist Razorpay

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