Commerce OS
The complete commerce stack for D2C brands, retailers and B2B sellers.
Your storefront, marketplaces, WhatsApp, stores and warehouse on one catalogue, one inventory and one order book. UPI and COD, courier aggregation, RTO control, GST e-invoicing and settlement reconciliation come built in, so you spend your time selling instead of stitching tools together.
Commerce OS is Stack18's ready-made commerce stack for D2C brands, retailers and B2B sellers, covering storefront, sales channels, fulfilment and growth in 33 modules. Editions are priced once in rupees: Launch ₹2.8L, Grow ₹7.3L and Scale ₹13.95L, excluding GST, with no per-user fees.
A single orders screen across your website, marketplaces, WhatsApp and stores, backed by one inventory.
One source of truth for products, variants, HSN codes, GST rates, media and attributes, feeding every channel.
A one-page, mobile-first checkout with pincode serviceability, prepaid offers and saved addresses.
UPI, cards, net banking, wallets, EMI and cash on delivery through your choice of gateway, with failure retries.
Marketplaces, website and stores each keep their own count, so you oversell on one channel and sit on dead stock in another.
Fake orders, wrong addresses and failed deliveries quietly eat into margin, and nobody sees the full cost until month end.
Gateway, COD remittance and marketplace payouts arrive net of fees and returns. Matching them to orders takes days in Excel.
Adding ONDC, WhatsApp or a retail store means another tool, another login and another spreadsheet to reconcile.
Each edition is a tested bundle of modules at 10–20% below their combined price. Prices are one-time build and setup, in rupees, excluding GST.
Brands taking their first channel online.
₹3,10,000 Save ₹30,000 (10%) · 10 modules
Includes
Sellers running website and marketplaces together.
₹8,60,000 Save ₹1,30,000 (15%) · 20 modules
Everything in Launch, plus
Omnichannel brands with stores, a warehouse and B2B.
₹17,45,000 Save ₹3,50,000 (20%) · 30 modules
Everything in Grow, plus
Need a different mix? Pick individual modules and see your price instantly.
33 modules in 6 groups. Tags show which editions include a module. Bigger modules include the smaller ones they contain, so nothing is charged twice, and required modules are added for you.
Your own channel, fast on mobile and built for Indian checkout.
A fast, SEO-ready branded website with catalogue, search, cart, UPI and COD checkout, and customer accounts wired in. Your own channel, your own customer data.
A native-feeling shopping app on the same catalogue, cart and customers as your website, with push notifications and app-only offers.
One source of truth for products, variants, HSN codes, GST rates, media and attributes, feeding every channel.
Typo-tolerant, Hinglish-friendly search with filters, sorting and merchandising rules that help shoppers find the right product.
A one-page, mobile-first checkout with pincode serviceability, prepaid offers and saved addresses, so more carts become orders.
UPI, cards, net banking, wallets, EMI and cash on delivery through your choice of gateway, with failure retries.
OTP login, order history, saved addresses, wishlist and one-click reorder.
Login-based ordering for dealers and bulk buyers, with tiered price lists, MOQ, credit limits and GST invoices.
Sell wherever your customers already are.
Two-way sync of listings, stock, prices and orders with Amazon, Flipkart, Meesho, Myntra and Ajio.
List and sell on the ONDC network, with catalogue, order and settlement flows handled for you.
Browse, add to cart and pay by UPI inside WhatsApp, with order updates in the same chat.
Always-fresh product feeds for Google Merchant Center, Meta and Instagram shops.
Fast GST billing for your stores, with barcode scanning, UPI QR, returns and offline mode, on the same stock as online.
From order to doorstep, with fewer failed deliveries.
One order book for every channel, with routing rules, split shipments, holds and a clear status for each order.
Live stock across warehouses, stores and dark stores, with reservations so you never oversell.
Book with Shiprocket, Delhivery, Blue Dart, Xpressbees and more, choosing by rate, speed and pincode performance.
WhatsApp COD confirmation, address quality checks, risky pincode rules and NDR follow-ups that cut returns to origin.
Self-serve returns and exchanges with reverse pickup, QC checks and instant refunds to source or store credit.
Bins, putaway, pick-pack-ship, barcode scanning and wave picking, so dispatch keeps up on sale days.
Same-day and slot-based delivery from nearby stores, plus buy online and pick up in store.
Every rupee accounted for, every invoice compliant.
GST-compliant invoices with IRN and QR generated as orders are packed, including credit notes for returns.
E-way bills generated and updated automatically for qualifying shipments and stock transfers.
Gateway, COD remittance and marketplace payouts matched to orders, with fees, TCS and short payments flagged.
Sales, returns, receipts and fees posted to your books automatically, mapped to your ledgers.
Turn first orders into loyal customers.
Coupons, bundles, buy-x-get-y, flash sales and prepaid incentives, controlled by your marketing team.
Automatic WhatsApp, SMS and email nudges with a one-tap link back to the cart.
Subscribe-and-save with UPI AutoPay, plus skip, pause and swap controls.
Points, tiers and cashback that work online and in store.
Photo and video reviews collected after delivery and shown where they convert.
Channel, product, cohort and contribution-margin dashboards, including RTO and discount impact.
AI that sells, writes and plans for you.
Product titles, descriptions and attributes written for each channel, in English and Indian languages.
A conversational assistant on your site and WhatsApp that recommends products and answers order questions.
Forecasts demand by SKU and location, including festive peaks, and suggests what to reorder and when.
Pick an edition to apply its price, then add or remove modules. Indicative one-time build and setup, excluding GST. Request a quote when you are ready.
Integrations are scoped with your quote. Third-party accounts stay in your name, and usage is billed by each provider.
Size-colour variants, exchanges and festive drops without overselling.
Subscriptions, combos and reviews that build repeat buying.
Serial numbers, warranty and EMI checkout handled properly.
Batch and expiry tracking, hyperlocal delivery and B2B orders from one stock.
You pay once to build and set up the modules you choose.
Optional Stack18 Care plan from 15% of build value per year: updates, security patches, priority support and small enhancements.
Grow typically takes 6–8 weeks and Scale 10–14 weeks, delivered in phases so your business keeps running.
We map your process, data and integrations, confirm the edition or module set, and fix a go-live date.
The solution is deployed on your cloud and configured to your workflows, roles, approvals and templates.
We connect payments, GST, messaging and your existing tools, and bring your data across.
Training, a supported launch and 30 days of hypercare. Add modules whenever you are ready.
Yes. Start with the Launch edition and add modules whenever you need them. Everything shares one catalogue and order book, so nothing is rebuilt when you grow.
No. Commerce OS is a one-time build and setup fee per module, with no GMV commission and no per-seat fees. Gateway, courier and WhatsApp charges are paid directly to those providers at their rates.
COD orders are confirmed on WhatsApp, addresses are checked for quality, risky pincodes follow your rules (prepaid-only, partial COD or hold), and NDRs are followed up automatically.
Yes. We can migrate your catalogue, customers and order history, or keep your storefront and run orders, inventory and reconciliation on Commerce OS.
Yes. HSN codes and tax rates live on the product, and e-invoices, credit notes and e-way bills are generated with the order, including for stock transfers.
Want a custom storefront or a branded shopping app on top? Our web development and mobile app development teams build them. See how we delivered a website, mobile app and ERP for a ₹100+ crore ethnic wear brand.
Share how you work today. We will recommend an edition, show you a live demo and send a clear, fixed quote.
