How a Marketplace Seller Unified Amazon, Flipkart and Shopify in 45 Days
Selling on 3 channels with 3 dashboards, 3 inventory sheets and constant overselling. How one seller connected everything into Mera and cut overselling to zero.
The Problem
A ₹8Cr/year seller was live on Amazon, Flipkart and Shopify — but each channel lived in its own world.
What they were dealing with:
- 11 overselling incidents in 30 days
- 2 hours daily reconciling inventory across 3 dashboards
- Amazon showing 12 units, Shopify showing 20, warehouse had 8
- 18% of orders required manual cancellation
- No single view of what was actually selling where
The root cause: No operating layer. Each marketplace was a silo. Inventory decrements in one place never reflected in the others.
What We Did
Week 1-2: Audit & Architecture
We mapped the channel fragmentation:
- Amazon Seller Central (42 SKUs)
- Flipkart Seller Hub (38 SKUs)
- Shopify (31 SKUs, D2C storefront)
- Tally for accounting
- Manual Google Sheet as the “master” inventory
Key finding: 14 SKUs existed on all three channels with three different stock counts. Overselling was guaranteed.
Week 3-4: System Setup
We connected the channels into Mera:
- Canonical catalog — One product → three channel listings, single stock count
- Inventory sync — Every sale decrements canonical inventory, pushes to all channels within 90 seconds
- Order unification — All orders land in one queue with channel tag
- Exception detection — Low stock alerts before any channel hits zero
Week 5-6: Optimization
- Set up marketplace-specific pricing rules
- Enabled channel profitability view
- Added RTO tracking by channel
The Results (45 Days)
| Metric | Before | After | Change |
|---|---|---|---|
| Overselling incidents (30d) | 11 | 0 | -100% |
| Daily reconciliation time | 2 hrs | 8 min | -93% |
| Order cancellation rate | 18% | 2% | -89% |
| Inventory accuracy | 61% | 97% | +59% |
| Time to list new SKU (3 channels) | 3.5 hrs | 22 min | -90% |
What Made It Work
One inventory, many channels. They didn’t need better marketplace tools. They needed:
- Canonical product catalog
- Real-time cross-channel sync
- Single order queue
- Channel profitability visibility
Mera provided the operating layer. Vridhi built the marketplace system.
Key Takeaway
“We were overselling 3 times a week. Now we haven’t oversold in 43 days. The team got 10 hours a week back.”
— Founder, Fashion Accessories Brand
This use case demonstrates our Marketplace Growth and Omnichannel systems. Get a Commerce Assessment →
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