Best Shopify Inventory Management Apps for Growing Stores

Inventory management is one of the most operationally critical challenges for growing Shopify stores. Overselling causes customer complaints and refunds. Understocking means lost sales and disappointed customers. Manual stock counts waste hours and introduce errors. As order volumes grow and product catalogues expand, Shopify’s native inventory tools — adequate for early-stage stores — begin to show their limitations. In this guide, OneOnic — a global Shopify agency — reviews the best Shopify inventory management apps for stores at different stages of growth, from early-stage single-location businesses to multi-warehouse operations.

When to Move Beyond Shopify’s Native Inventory

Shopify’s built-in inventory tools are functional for straightforward operations: you can track stock levels, set low-stock alerts and manage variants. But several common scenarios quickly reveal their limitations.

The first is multi-location selling. Shopify supports multiple locations, but managing stock allocation between a warehouse, retail store and fulfilment centre requires more sophisticated tools than the native admin provides. The second is demand forecasting — Shopify tells you what you currently have, but not what you are likely to need. The third is supplier management and purchase orders — creating and tracking purchase orders from within Shopify is limited without a specialist app. The fourth is multi-channel selling: if you sell on Shopify, Amazon, eBay and wholesale simultaneously, keeping stock levels synchronised across all channels manually is both time-consuming and error-prone.

If any of these scenarios apply to your business, the apps below are worth evaluating.

Stocky by Shopify: Best Free Option for Single-Location Stores

Pricing: Free (developed by Shopify, available to all merchants).

Stocky is Shopify’s own inventory management app, available free from the Shopify App Store. It adds meaningful functionality beyond the core admin: demand forecasting based on sales history, purchase order creation and supplier management, inventory counts and adjustments, and low-stock alerts with suggested reorder quantities.

Key features: Purchase order creation, supplier management, demand forecasting, inventory counts, ABC analysis (classifying products by sales velocity), low-stock alerts, and basic reporting.

Pros: Free; built by Shopify so integration is native and reliable; covers the most common inventory management needs for smaller operations; demand forecasting is surprisingly capable for a free tool.

Cons: Limited to POS and single-channel Shopify operations; no multi-channel sync; not suitable for multi-warehouse operations; reporting is basic compared to paid alternatives.

Best for: Shopify merchants with a single warehouse or storage location selling exclusively on Shopify, processing under 500 orders per month. An excellent starting point before investing in a more sophisticated platform.

Linnworks: Best for Multi-Channel Inventory Sync

Pricing: Bespoke pricing based on order volume; typically starts from $449/month for small business plans. Demo and custom quote required.

Linnworks is the leading multi-channel inventory and order management platform for scaling ecommerce businesses. It connects Shopify with Amazon, eBay, Etsy, Walmart, and dozens of other sales channels, keeping stock levels synchronised in real time across all of them. It also handles order routing, warehouse management, shipping label generation, and purchase order management.

Key features: Real-time multi-channel stock synchronisation, centralised order management across all channels, warehouse management (bin locations, pick lists, packing slips), shipping integration (Royal Mail, FedEx, UPS, DPD and others), purchase order management, supplier catalogue, demand forecasting, and detailed inventory analytics.

Pros: The most comprehensive multi-channel solution available for Shopify; real-time stock sync prevents overselling across channels; the shipping integration alone saves significant time for high-volume operations; strong customer support; proven at scale.

Cons: Significant cost; complex to implement correctly (typically requires professional onboarding); overkill for single-channel stores; pricing is opaque without a sales conversation.

Best for: Multi-channel merchants processing 1,000+ orders per month across two or more sales channels. If you are selling on Shopify, Amazon and eBay simultaneously, Linnworks pays for itself quickly.

Skubana (now Extensiv Order Manager): Best for 3PL and Multi-Warehouse

Pricing: Custom pricing; typically from $500/month depending on order volume and warehouse count.

Extensiv (formerly Skubana) specialises in operations management for brands using third-party logistics (3PL) providers and multiple warehouses. It connects your Shopify store to your 3PL’s warehouse management system, automates order routing decisions (which warehouse fulfils which order based on stock availability and geography), and provides the inventory analytics needed to optimise stock allocation across locations.

Pros: Best-in-class for 3PL integration; sophisticated order routing logic; strong analytics for multi-warehouse operations; trusted by many high-growth DTC brands.

Cons: Enterprise pricing; requires significant implementation time; most valuable for brands already working with 3PL providers.

Best for: DTC brands using one or more 3PL providers where optimising order routing and maintaining accurate stock across fulfilment nodes is a daily operational challenge.

Back in Stock and PreOrder Now: Handling Stock Gaps

Regardless of which inventory management platform you use, two supplementary apps address the customer experience when products are out of stock:

Back in Stock by Appikon: Pricing from $19/month. Allows customers to register their email or phone number to be notified when an out-of-stock product becomes available. These notifications achieve open rates of 60–70% and conversion rates far higher than standard email campaigns because the recipient specifically asked for this notification. Essential for any store with frequently out-of-stock products.

PreOrder Now: Pricing from $14.99/month. Converts out-of-stock product pages into pre-order landing pages, capturing sales even before new stock arrives. Rather than losing potential buyers to competitors, you collect their order and fulfil it when the next shipment lands. Works particularly well for seasonal products and limited drops.

Frequently Asked Questions

What is the biggest inventory mistake Shopify merchants make?

The most common and costly inventory mistake is reactive rather than proactive stock management — waiting until a product is out of stock before reordering, rather than using sales velocity data to predict when stock will run out and placing purchase orders in advance. This is particularly damaging for products with 4–8 week lead times from overseas suppliers. Demand forecasting tools within apps like Stocky or Linnworks calculate reorder points automatically based on your sales history and supplier lead times, which eliminates most reactive stockout situations. The second most common mistake is failing to account for seasonal demand variation when setting reorder points.

How does Shopify handle inventory across multiple locations?

Shopify’s native multi-location inventory allows you to track stock at up to 1,000 locations, set per-location stock levels, and configure which locations fulfil online orders. When an order is placed, Shopify can automatically select the fulfilment location based on configured priority rules. However, the native tools lack sophisticated stock allocation logic (routing based on proximity to customer, for example), automated purchase order generation per location, or detailed cross-location analytics. Specialist apps like Linnworks or Extensiv add this capability on top of Shopify’s native infrastructure.

Should I use a 3PL, and does Shopify integrate with them?

Third-party logistics (3PL) providers warehouse your products and handle picking, packing and shipping on your behalf. They make financial sense for stores processing 200+ orders per month, at which point the cost per fulfilment at a professional 3PL typically undercuts in-house fulfilment on time, space and labour combined. Shopify integrates directly with major 3PLs including ShipBob, Whiplash and Amazon Multi-Channel Fulfilment through dedicated apps or API connections. If you are considering moving to a 3PL, evaluate whether their Shopify integration includes real-time stock sync, automatic order forwarding, and return processing — these three capabilities determine how smooth the operational handover will be.

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