Active Inventory: multichannel inventory management software for eCommerce and marketplaces
Combine every warehouse into one centralized view, allocate quantities to each sales channel with flexible rules, and sync availability in real time across your eCommerce, marketplaces and social commerce. No cancelled orders, no overselling.
What Active Inventory does: multichannel inventory management software, built into the platform
Active Inventory is Highstreet.io’s multichannel inventory management software. It imports stock levels from your physical or virtual warehouses, aggregates them into one centralized inventory, decides how many units to expose on each channel, and pushes every change — an order received, a return, an ERP update — to your eCommerce, marketplaces and social channels in real time.
It is built for brands and retailers that sell the same products in several places at the same time: a fashion brand on Zalando, Farfetch and its own Shopify store; a retailer with a central warehouse and physical stores; a company adding Amazon next to its website. The problem is always the same — one stock, many storefronts —and every gap between the two becomes an order to cancel.
Active Inventory integrates with the systems you already run — Shopify, Adobe Commerce, ERP, marketplaces — and is part of Highstreet.io’s Marketplace Integration di Highstreet.io, insieme a Order Management module and Image Manager.
How to avoid overselling on marketplaces
Overselling is selling a unit you no longer have — typically because two channels sold the same item before stock was updated. The outcome is a cancelled order, a refund, and on marketplaces a hit to seller metrics that, on Amazon or Zalando, can lead to account suspension.
The causes are almost always three: stock updates that are too slow (nightly exports, files uploaded by hand), the full stock exposed on every channel at once, and no reservation of units already ordered but not yet shipped.
Active Inventory addresses all three: it updates availability in real time, lets you allocate a share of stock to each channel instead of the whole quantity, and reserves ordered units the moment the order comes in, releasing them only when the warehouse confirms shipment. Two channels can no longer sell the same unit.
How to prevent stockouts across sales channels
A stockout is a product showing as sold out on a channel while it is still available — in another warehouse, or reserved to a channel that is not selling it. It is not an error: it is a lost sale, and on marketplaces it also means lost ranking for the listing.
Stockouts on multichannel setups usually come from stock being split into fixed silos per channel, with no way to move units to where demand actually is. Active Inventory keeps one centralized view of every warehouse and lets you reallocate stock between channels based on where it sells, instead of leaving units frozen in an allocation that does not turn. The result is fewer out-of-stock situations on the channels, fewer orders cancelled for unavailable products, and faster stock rotation.
How multichannel inventory sync works with Active Inventory
1. Import stock from every warehouse
Active Inventory receives stock data from your physical or virtual warehouses — central warehouse, stores, third-party logistics, drop shippers — through integrations with your ERP, WMS or eCommerce platform.
2. One centralized inventory view
3. Stock reservation on orders
4. Inventory allocation rules per channel
5. Real-time updates to every channel
6. Closing the loop with the warehouse
Why a dedicated inventory layer, and not your ERP or a marketplace plugin
Your ERP knows the physical stock but nothing about the commercial logic of your channels: it does not decide how many units to show on Zalando versus your own store, it does not speak each marketplace’s format, and it does not update in real time. Native plugins sync one channel at a time, each with its own rules — with three marketplaces you get three independent syncs that cannot see each other.
Active Inventory sits in between: it takes the truth about stock from the ERP, applies the commercial rules per channel, and distributes the result through Highstreet.io’s marketplace connectors. It is the same layer that handles orders (Order Management module) so stock travels with the rest of the catalog.
If you want to understand the topic before evaluating a tool, start here: multi-channel inventory management: what it is and how it works..
A (scalable) inventory management software
Active Inventory easily integrates with the systems you already use—Shopify, Adobe Commerce, ERP, marketplaces. Configurations are flexible and adapt to any type of logistics, even the most complex. The result?
Fewer canceled orders due to unavailable products, a significant reduction in out-of-stock situations, and more efficient stock rotation.
Frequently asked questions about Active Inventory
What does a multichannel inventory management software do?
What is overselling and how do you avoid it?
What is a stockout and how do you prevent it?
Which systems does Active Inventory integrate with?
The main eCommerce platforms (Shopify, Adobe Commerce), ERP and warehouse systems, and the marketplaces and social channels supported by Highstreet.io. Request a demo to find out all integrations.
How often is stock updated on marketplaces?
Does Active Inventory handle multiple warehouses?
Explore marketplace management with Highstreet.io
Multi-channel inventory management
What it is, how it works and why it is critical for those selling on multiple marketplaces
Case Studies
