Quick answer: at under about 100 orders a month you need GST billing and nothing else. Between roughly 100 and 1,000 orders across more than one channel, you need multi-channel inventory and order management plus a shipping aggregator. Above that, you need settlement reconciliation, warehouse processes and usually your own storefront. Buying the 5,000-order stack at 50 orders is the most common and most expensive mistake new sellers make.
Stage 1 — Under ~100 orders a month, one or two channels
What you need: GST-compliant billing, and a spreadsheet.
At this volume, marketplace panels are sufficient for orders. What you must not skip is compliant invoicing and books, because retrofitting a year of marketplace sales into accounts is painful and expensive. Vyapar, myBillBook and Zoho Books are the usual starting points; TallyPrime and BUSY if your accountant already works in them. Our accounting software comparison and Tally vs Zoho Books vs BUSY cover the choice.
What you should not buy yet: an order-management system, a warehouse tool, or an ERP. They cost more than they save at this volume and they add process you cannot yet staff.
The one habit to build now: reconcile every marketplace settlement against your orders. Doing it manually while it is small teaches you where the money leaks, which makes you a much better buyer later.
Stage 2 — ~100 to 1,000 orders a month, two or more channels
This is where the real buying decision happens, and it is triggered by a specific event: you oversell stock because the same unit was listed on two marketplaces.
Multi-channel order and inventory management is the answer. One stock pool, synced to every channel, with all orders in one dispatch queue. The established Indian options are EasyEcom, Unicommerce, Vinculum and Browntape. What to compare:
- Which marketplaces and carts are supported natively — check yours by name, including Meesho and Flipkart.
- How fast inventory syncs after a sale, because the sync interval is your oversell window.
- Whether settlement reconciliation is included or is a paid module.
- Whether it handles your return and RTO flow, not just forward orders.
- Pricing model: per order, per SKU, or a flat tier — and what happens in a peak month.
Shipping aggregation for self-shipped channels and your own storefront: Shiprocket, iThink Logistics, NimbusPost, Shipyaari, Delhivery. Compare on serviceable pincodes for your customers, RTO rate, weight-discrepancy handling and how disputes are resolved — not on the headline rate card. See iThink vs Shiprocket vs Shipyaari.
Stage 3 — Above ~1,000 orders a month
Three things change.
Reconciliation becomes a function, not a task. Marketplace fee errors, unclaimed damaged returns and weight-discrepancy charges add up to real money at this volume. Either your order-management system does automated reconciliation or someone owns it full time.
Warehouse process starts to matter. Pick paths, bin locations, batch picking and packing stations. Some order-management tools include light warehouse features; dedicated warehouse management is a later step. See our inventory and warehouse management guide.
You need demand you own. Marketplaces are rented demand: the customer is theirs, the pricing pressure is permanent, and the fee structure can change. A own-brand storefront on Shopify or WooCommerce, plus a WhatsApp and email channel to your existing buyers, is what converts a marketplace business into a brand. Our website builders and hosting guide and WhatsApp automation guide cover the tooling.
The buying traps
| Trap | What happens | Avoid by |
|---|---|---|
| Buying an ERP too early | Months of implementation, no operational gain | Buy order management first; ERP when finance and manufacturing need it |
| Choosing on rate card alone | Shipping "cheaper" but RTO and weight disputes cost more | Compare landed cost per delivered order over a month |
| Ignoring sync interval | Oversell penalties on marketplaces | Ask the exact inventory sync frequency, in seconds |
| Per-order pricing at peak | A festive month costs several times normal | Model pricing at your peak month, not your average |
| No reconciliation | Fee errors and unclaimed returns never recovered | Make reconciliation a named owner's job from Stage 2 |
FAQs
What software does an e-commerce seller in India need?
At low volume, GST-compliant billing such as Vyapar, myBillBook or Zoho Books. Once you sell on more than one channel, add multi-channel inventory and order management such as EasyEcom or Unicommerce, plus a shipping aggregator. Above roughly 1,000 orders a month, add settlement reconciliation, warehouse process and your own storefront.
When should I buy an order management system?
When you first oversell stock because the same unit was listed on two marketplaces, or when dispatch across channels stops fitting in one person's morning. Usually somewhere between 100 and 300 orders a month across two or more channels.
Do I need an ERP to sell online?
Not for selling. An ERP earns its place when finance, purchasing, manufacturing or multi-location stock need to be managed together — not when you need orders and inventory synced, which is what order-management software does far better and far faster. See ERP software if you have reached that point.
How do I choose a shipping aggregator?
Compare landed cost per delivered order over a real month rather than the published rate card: serviceable pincodes for your actual customer base, RTO rate, weight-discrepancy charges and how disputes are settled. A cheaper rate with a higher RTO rate is more expensive.
Should I build my own website or stay on marketplaces?
Both. Marketplaces give you demand you do not own and margin pressure you cannot control; a storefront on Shopify or WooCommerce plus a direct channel to past buyers is how you build something that is worth more than its last month of sales. Start it once you are past roughly 1,000 orders a month.
Next step: tell us your channels and monthly order volume and we will send a free matched shortlist, or ask the AI advisor.
