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 tight, step-by-step availability-check guide that's easy to follow the first time you use the government search tool without... LegalWiz Article · D2C How to Check Trademark Availability in India: Step-by-Step Guide LegalWiz In 2 answers
  2. The cleanest plain-English starting point from the platform most Indian D2C brands actually run on. It nails the core idea -... shopify.com Article · D2C What Is Contribution Margin? Definition and Guide Shopify In 2 answers
  3. The best worked-example explainer for actually doing the math: Net Sales minus product cost, shipping, payment fees, fulfilment... storehero.ai Article · D2C Contribution Margin Formula for Ecommerce (With Real Examples) StoreHero In 2 answers
  4. Goes one level deeper than a formula: it rebuilds the contribution-margin income statement for a real D2C P&L, so you can... polaranalytics.com Article · D2C Contribution Margin Ratio, Per Unit & Income Statement: The Complete DTC Breakdown Polar Analytics In 2 answers
  5. An encyclopedia-style reference rather than a vendor's sales pitch, which makes it a more neutral place to learn the actual... Racklify Warehouse & 3PL Logistics Encyclopedia Article · D2C Choosing D2C Fulfillment Partners: The Right Partner and Setup Racklify In 2 answers
  6. Makes the India-specific case for 3PL over self-fulfillment, real estate cost, labour management, and pincode reach are... WareIQ Blog Article · D2C Why E-commerce and D2C Businesses Choose 3PL for Their Fulfilment Needs WareIQ In 2 answers
  7. A current shortlist of the actual India 3PL landscape a founder would be choosing between, useful as a starting point for... WareIQ Blog Article · D2C Top 10 3PL Warehousing Companies in India (2026 List) WareIQ In 2 answers
  8. An honest primer on when dropshipping actually makes sense and when it doesn't, great for testing demand cheaply, weak as the... Shopify Blog Article · D2C What Is Dropshipping and How Does It Work? (2026) Shopify Editorial In 2 answers
  9. Gupshup is one of Meta's largest India-focused BSPs and the most technical/flexible option for higher-volume senders, this... Gupshup Article · D2C The Ultimate Guide to WhatsApp Business API Gupshup In 2 answers
  10. The best global reference for SMS specifically, useful for the transactional/OTP fallback layer that still matters even in a... Klaviyo Article · D2C The Complete SMS Marketing Guide for Campaign Success Klaviyo In 2 answers
  11. A rare pricing comparison that actually breaks down BSP platform fees separately from Meta's per-conversation charges, which is... Codingclave Article · D2C WhatsApp API Pricing India 2026: Audited Costs From Rs 0/mo Codingclave In 2 answers
  12. A direct, practical head-to-head on the two tools founders ask about most, useful as the tie-breaker once you've narrowed your... Neogen Media Article · D2C WhatsApp Business API Agency Guide: Wati vs AiSensy Neogen Media In 2 answers
  13. A comprehensive, current D2C-specific guide covering setup through automation through compliance in one place, a good... Hawknest Article · D2C WhatsApp Marketing for D2C Brands: The Complete 2026 Guide Hawknest In 2 answers
  14. Makes the strongest ROI case for prioritising WhatsApp with concrete India performance figures, useful ammunition if you need... iMark Infotech Article · D2C WhatsApp Business Marketing in India: The Channel Driving 11x ROAS Most Brands Still Underuse iMark Infotech In 2 answers
  15. Written specifically for D2C sellers rather than generic taxpayers, it walks through the exact mistakes that block a first... ITRnGST Article · D2C The E-commerce & D2C GST Guide (2026): Registration, TCS & Refund Wins ITRnGST In 2 answers
  16. Shopify's own India tax documentation is the most direct answer for a founder building on Shopify specifically: what GST does... Shopify Help Center Article · D2C GST in India FAQ Shopify In 2 answers
  17. The one resource that goes past 'GST is mandatory' into the operational reality of quick commerce: separate GSTIN or APOB... Tax Garden Article · D2C GST and Compliance Guide for Blinkit, Swiggy Instamart, and Zepto Sellers (2026) Tax Garden In 2 answers
  18. Covers the one real exception to 'GST from order one': Meesho's Enrolment ID route for specific exempted categories under the... Gonukkad Article · D2C How To Sell On Meesho Without GST in 2025 Gonukkad In 2 answers
  19. The official onboarding document handed to every newly registered taxpayer, worth reading once end to end so you know exactly... GST Portal, Government of India Report · D2C Welcome Kit for New Taxpayers GST Portal, Government of India In 2 answers
  20. The clearest explanation of the fork in the road: some applicants get simple OTP based Aadhaar authentication, others get... IndiaFilings Article · D2C Aadhaar and Biometric Authentication for GST Registration IndiaFilings In 2 answers
  21. This is the actual GSTN checklist, a one-page table listing every document category, the exact file type and size limit (JPG or... GST Tutorial Portal (GSTN) Report · D2C Check-list of Documents Required For GST Registration Goods and Services Tax Network (GSTN) In 2 answers
  22. This is the actual CBIC circular that tells GST officers exactly which documents they are and are not allowed to demand, so it... CBIC, Ministry of Finance, Government of India (via PIB) Report · D2C Instruction No. 03/2025-GST: Instructions for processing of applications for GST registration Shrunkhala Kangale, Deputy Secretary, CBIC In 2 answers
  23. The contrarian case, worth reading precisely because it argues composition can protect early cash flow. Stress test our 'skip... TaxGuru Article · D2C GST Composition Scheme as a Growth Tool for B2C and D2C Startups TaxGuru In 2 answers
  24. Inc42 covers India's startup economy closely, and this piece ties the September 2025 GST 2.0 rate cuts directly to D2C brand... Inc42 Report · D2C GST Reforms: Booster Shot For D2C Startups, New-Age Brands? Inc42 In 2 answers

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