How XStak OMS Powers ZARR's Multi Vendor Marketplace

Running a marketplace is very different from running one brand's store. Every order can involve a different vendor, a different warehouse, a different courier pickup and a different payout. ZARR, Jazz's fashion and lifestyle marketplace, needed one system to keep all of that moving at scale. It chose XStak OMS.

About ZARR

ZARR is a digital fashion and lifestyle marketplace from Jazz, Pakistan's leading digital operator. It brings local and international brands together in one app and website, with exclusive deals, AI-powered recommendations and personalized shopping.

ZARR has grown fast. In August 2026, during its Azaadi Sale, it reported its highest-ever daily sales at about 3x its previous peak, 4x month-over-month growth, 2.5 million active users, over 30% repeat shoppers and roughly 70% prepaid orders.

The challenge: one marketplace, hundreds of moving parts

A customer on ZARR sees one cart and one checkout. Behind it, a single order can hold items from three different brands, stored in three different cities. Before XStak OMS, keeping that promise was hard.

ZARR faced six core problems:

• Multi-vendor orders. One customer order had to be broken into separate vendor orders by hand, so each brand knew what to pack.
• Inventory out of sync. Vendors sold the same stock on their own websites and stores. ZARR's listings showed items that were already gone, leading to cancellations.
• Vendor visibility. Vendors relied on emails, calls and spreadsheets to learn about new orders, so dispatch was slow.
• Courier coordination. Pickups had to be arranged from many vendor locations across Pakistan, each with its own courier.
• Sale-day spikes. Campaigns like the Azaadi Sale brought sudden order surges that manual processes could not absorb.
• Settlements and reconciliation. With prepaid and COD orders, returns and commissions, working out what each vendor was owed took days.

ZARR needed a system that could treat every vendor like a fulfillment location, and every order like a set of trackable vendor shipments.

Why ZARR chose XStak OMS

ZARR needed a Pakistani platform that already understood local brands, local couriers and COD. 

XStak OMS stood out for five reasons:

1. Built for multi-location retail. XStak OMS already syncs inventory across warehouses, stores, POS and ERP for leading Pakistani fashion brands, so treating each vendor as a location was a natural fit.
2. Proven at fashion-brand scale. Brands such as Zara Shahjahan, Walkeaze and Maria B run on XStak.
3. Local courier network. Automated booking with multiple Pakistani couriers and 3PLs, with courier performance tracked by location.
4. API-first integrations. Vendors on Shopify, other storefronts or POS systems could connect without changing how they work.
5. Transaction-based pricing. No heavy setup or yearly licence fees, so costs grow with order volume.

The solution: how XStak OMS runs ZARR's marketplace

XStak OMS became the central hub between ZARR's storefront, its vendors, the couriers and finance. Here is how each part works.

The customer places one order; XStak OMS splits it by vendor, books a courier for each pickup and keeps the data finance needs for settlement.

1. One order, split by vendor automatically

When a customer checks out with items from several brands, XStak OMS splits the order into vendor sub-orders in seconds. Each vendor sees only its own items, while the customer still tracks one order.

2. Real-time vendor inventory sync

Vendor stock syncs into ZARR from their storefronts, POS or ERP through XStak's APIs. When an item sells out at a vendor's own store, it disappears from ZARR too. Overselling and stock-out cancellations dropped sharply.

3. Smart order routing to the right vendor location

Many brands on ZARR have several warehouses or stores. XStak OMS routes each sub-order to the vendor location closest to the customer that has the stock, cutting delivery time and shipping cost.

4. A vendor portal for fast dispatch

Vendors get instant email and SMS alerts and a role-based view of their orders. They accept, pack and mark orders ready for pickup from one screen, with no calls or spreadsheets.

5. Automated courier booking from every vendor

XStak OMS books the courier for each vendor pickup and generates the airway bill automatically. It selects the courier based on performance by location, so each shipment goes with the partner most likely to deliver it on time.

6. Live tracking for customers and ZARR's support team

Customers get SMS and email updates at every stage. ZARR's customer service team sees the status of every vendor shipment in one place, so "Where is my order?" calls are answered in seconds.

7. Clean data for vendor settlements

Every sub-order carries its vendor, payment method (prepaid or COD), delivery status and returns. ZARR's finance team uses this to calculate commissions and vendor payouts accurately, instead of rebuilding them from spreadsheets.

The results

Within six months of going live on XStak OMS, ZARR saw clear gains across operations, customer experience and finance.

What this meant for ZARR

• Customers got their orders faster and with fewer cancellations, which supports repeat shopping.
• Vendors got orders instantly, dispatched faster and were paid sooner, which made ZARR a more attractive channel to sell on.
• ZARR's team stopped firefighting spreadsheets and handled record sale days without adding headcount.

Lessons for other marketplaces in Pakistan

If you run, or plan to launch, a multi-vendor marketplace, ZARR's experience points to five practical lessons:

1. Treat every vendor as a fulfillment location. Once vendors sit inside your OMS like warehouses, routing, tracking and reporting all work the same way.
2. Sync vendor stock in real time. Most marketplace cancellations come from stock sold elsewhere. Live inventory sync fixes the root cause.
3. Automate the order split. Manual splitting breaks first on sale days. Let the OMS do it at checkout.
4. Own the courier layer. Central courier booking and performance tracking keeps delivery quality consistent, even when vendors are spread across cities.
5. Capture settlement data at the order level. Vendor, payment method, delivery status and returns on every sub-order make payouts fast and disputes rare.

Frequently asked questions

What is a multi-vendor marketplace order management system?

It is an OMS that manages orders from many independent sellers on one platform. It splits each customer order by vendor, syncs vendor inventory, routes orders to vendor locations, books couriers and tracks every shipment and payout.

How does XStak OMS handle orders with items from several vendors?

XStak OMS splits the order into vendor sub-orders automatically at checkout. Each vendor fulfills its own items, while the customer tracks a single order.

Can vendors keep using their own Shopify store or POS?

Yes. XStak OMS connects to leading storefronts, POS and ERP systems through its API, so vendor stock stays in sync without changing how vendors work.

How does XStak OMS reduce cancellations on a marketplace?

It syncs vendor inventory in real time. When an item sells out at a vendor's own store or website, it is removed from the marketplace straight away, so customers cannot order stock that no longer exists.

Does XStak OMS support COD and prepaid orders?

Yes. Every order carries its payment method, so marketplaces can manage COD and prepaid orders together and use that data for vendor settlements.

Which couriers does XStak OMS work with?

XStak OMS books shipments automatically with multiple local and global couriers and 3PL partners, and tracks courier performance by location.

How long does it take to go live?

ZARR went live in about eight weeks. Timelines depend on the number of vendors and integrations.

Run your marketplace on XStak OMS

Whether you are launching a new marketplace or scaling one with hundreds of vendors, XStak OMS gives you one system to split orders, sync vendor stock, route shipments, book couriers and track every payout across Pakistan.

Request a demo of XStak OMS and see how it would run your marketplace.