Best Inventory Management Software for Shopify (2026)

Shopify Tracks Inventory. It Does Not Plan It.

Shopify tells you how many units you have. That is useful, but it is not inventory management. It does not tell you when you will run out. It does not account for your supplier's 21-day lead time. It does not warn you that your bestseller has 8 days of stock left and you should have ordered last week.

I ran a Shopify store for 18 months before I realized the difference between inventory tracking and inventory planning. Tracking is looking in the mirror. Planning is looking through the windshield. One shows you the present. The other keeps you from crashing.

Here are the tools that turn Shopify from an inventory tracker into a planning system.

Comparison Table

Tool	Best For	Forecasting	Amazon	Price From
ReplenishRadar	Shopify + Amazon sellers	Yes	Native	$99/mo
Stocky	Shopify POS Pro users	Basic	No	Free
Inventory Planner	High SKU catalogs	Yes	Yes	~$99/mo
Sellbrite	Multi-marketplace listing	No	Yes	$29/mo
Cin7	Wholesale + retail	Yes	Yes	$349/mo

ReplenishRadar -- Best for Forecasting and Stockout Prevention

This is our product, so take this with the appropriate grain of salt. But we built ReplenishRadar to solve the specific problem I kept hitting: knowing how much to order and when to order it for a Shopify store with 100+ SKUs and suppliers with varying lead times.

The system pulls your Shopify sales history, builds demand forecasts per SKU, and calculates days-to-stockout based on current inventory and supplier lead times. When a SKU crosses its reorder threshold, you get a recommendation with the exact quantity to order. If you also sell on Amazon, it coordinates both channels so you are not accidentally draining Shopify stock to refill FBA.

The purchase order workflow handles the rest: create POs, track them through approval, and close them when inventory arrives. No spreadsheet required.

Pricing: $99-$499/month based on SKUs, stores, and order volume. free inventory report.

Where it does not fit: Shopify-only stores with under 30 SKUs and no plans to add Amazon. At that scale, Stocky or even a spreadsheet works fine.

Stocky by Shopify -- Best Free Option

Stocky is Shopify's own inventory management app, free for Shopify POS Pro users. Native integration, basic demand forecasting, purchase orders, and transfers between locations. If you are already paying for POS Pro, Stocky is free and worth trying before you buy anything else.

The limitations are real though. No Amazon integration, limited forecasting sophistication, and it requires a POS Pro subscription to access. For Shopify-only stores using POS Pro who just need basic inventory management, Stocky is good enough. For anything more complex -- multi-channel, long supplier lead times, large catalogs -- you will outgrow it.

Inventory Planner -- Best for High SKU Counts

Inventory Planner handles thousands of SKUs with detailed forecasting parameters you can tune per product. Supplier lead time management, replenishment recommendations, and support for multiple marketplaces including Amazon.

The tradeoff is complexity. The learning curve is steeper than simpler tools, and the price point is higher. If you have 50 SKUs, Inventory Planner is more tool than you need. If you have 500+ and a team that will invest in configuring it, the granular control pays off. Pricing starts around $99/month and scales with SKU count.

Sellbrite -- Best for Multi-Marketplace Listing

Sellbrite is a listing management tool, not a forecasting tool. It excels at listing to Shopify, Amazon, eBay, Etsy, and Walmart from one place, with inventory quantity sync to prevent oversells.

If your problem is "I sell on five marketplaces and need to keep listings and quantities in sync," Sellbrite solves it at $29/month. If your problem is "I keep stocking out because I do not know when to reorder," Sellbrite will not help. It does not predict demand or calculate reorder points.

Cin7 -- Best for Wholesale + E-commerce

Cin7 is a broader operations platform for brands that sell both direct-to-consumer and through retailers. B2B portal, EDI connections, multi-location management, and manufacturing support.

Starting at $349/month with complex setup, Cin7 is overkill for pure DTC brands. It makes sense when you have wholesale accounts, need EDI, or have manufacturing operations alongside your e-commerce channels.

What Actually Matters for Shopify Stores

Not every feature is worth paying for. Here is how I think about it:

Must-have for any Shopify store above 50 SKUs: Real-time Shopify sync (so counts are always current), low stock alerts (so you know before you run out), and multi-location support if you use more than one warehouse.

Worth paying for if you are growing: Demand forecasting (predict what you will sell, not just what you sold), reorder recommendations (know when and how much to order), and a purchase order workflow (manage supplier relationships without email chains).

Only if you need it: Amazon FBA integration, supplier lead time tracking that adjusts automatically, and approval workflows for team-based purchasing. These matter for complex operations but are wasted on a solo operator with 40 SKUs.

How to Decide

The answer depends on two things: your channel mix and your SKU count.

Shopify-only, under 50 SKUs: Start with Stocky if you have POS Pro, or a spreadsheet if you do not. You do not need to spend $99/month yet.

Shopify-only, 50+ SKUs: ReplenishRadar or Inventory Planner. Both offer forecasting. ReplenishRadar is faster to set up. Inventory Planner gives more granular control for very large catalogs.

Shopify + Amazon: ReplenishRadar. Multi-channel coordination is the whole point of the product. You get unified forecasting, FBA restock suggestions, and a single inventory position across both channels.

Shopify + 4 other marketplaces: Sellbrite for listing sync, plus ReplenishRadar or Inventory Planner for the planning layer.

Wholesale + DTC: Cin7. Nothing else on this list handles B2B and DTC together well.

The sellers I talk to most often are running Shopify and Amazon with 50-300 SKUs. For that profile, ReplenishRadar is the right tool.

Start a free ReplenishRadar trial -- connect your Shopify store in under 5 minutes ->

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Related Reading:

• Shopify Inventory Forecasting Guide
• Inventory Forecasting 101
• E-commerce Inventory Management Guide