Inventory replenishment software helps ecommerce brands forecast demand, automate purchasing, and prevent stockouts. As you scale, manual planning gets harder across more SKUs, warehouses, suppliers and sales channels.
In this guide, we compare the best inventory replenishment tools for Shopify brands and show you how to set up automatic replenishment so it actually runs smart.
How Did We Pick the Best Inventory Replenishment Tools?
Prediko built this list, so here's exactly how we judged every tool, including our own.
- Forecasting accuracy - does it use sales history, seasonality and trends, not just averages?
- Automation - reorder calculations, PO generation, restock alerts and inventory monitoring.
- Shopify compatibility - native integration and real-time inventory sync.
- Integrations - ERP, WMS, accounting, 3PL and POS connections.
- Pricing transparency - does cost scale reasonably with your size?
- Merchant reviews - onboarding, reliability, support and day-to-day usability.
We list cons for every tool, Prediko included. This guide was first published in April 2026 and last updated in October 2026. Pricing changes often, so check each vendor's page before you buy.
Inventory Replenishment Software Comparison Table
What are the 7 best inventory replenishment tools?
No. 1 👉 Prediko's AI Inventory Replenishment App
TL;DR: Built for fast-growing Shopify brands. Prediko combines AI forecasting with native Shopify integration to predict demand, automate purchase orders and keep stock healthy in one place.
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Prediko brings real-time tracking, forecasting and Shopify integration together, so you can manage inventory across locations, sync stock levels, set up alerts and manage POs without switching tools.
"Prediko’s advanced analytics and reporting tools empowered us to predict demand patterns accurately, optimizing stock replenishment and reducing stockouts. Collectively, these factors have led to enhanced efficiency, optimized inventory levels, improved customer satisfaction, and cost savings." - Alix Beckstrand, Kate Hewko
Shopify App Store Rating: 4.9/5 (250+ Reviews on Shopify Store)
Key features
- AI demand planning: forecasts demand from sales history, seasonality and growth trends, and tracks actual sales against your revenue plan, so you can adjust before a launch or sale event, not after.
- Insights and analytics: flags overdue POs and SKUs at risk of stockouts or excess, with daily or weekly reports sent to your inbox.
- Predictive Buying Table: shows weekly sales, days of cover, ideal reorder dates and lead times per SKU, with a health bar and 100+ filters by SKU, category or product.
- Raw material management: tracks the components behind finished goods, so production doesn't stall on a missing material.
Pros
- Agent-based replenishment
- Handles variants and bundles across channels
- Raw material replenishment for brands that manufacture
- Responsive support team
Cons
- Integrations with some WMS and 3PLs are still in development
Pricing: Starter $49/month, Growth $199/month, Enterprise $349/month. Plans are based on revenue. Every plan gets the same core capabilities.
Best for: fast-growing Shopify brands, D2C operators, large SKU catalogs, brands that want AI forecasting.
2. Fabrikator
TL;DR: Good for demand forecasts, backorder management and restock alerts, so you can make purchasing decisions from one dashboard.
Fabrikator is an inventory planner for Shopify stores covering forecasting, replenishment, backorders and purchase orders.
Key features
- Demand forecasts from historical sales
- PO creation and sharing with suppliers from the platform
- Restock alerts when stock runs low
Pros
- Backorder and pre-order automation
- Automated PO creation.
Cons
- Costs can add up for backorder-heavy businesses
- Some merchants report onboarding friction
Pricing: Starts at $99/month and scales up to $1,999/month
Best for: Shopify-first brands that need PO automation and want off spreadsheets. See how it compares: For more details, check out Fabrikator vs Prediko.
3. SKULabs
TL;DR: Built for multichannel sellers with warehouse operations — barcode fulfillment, real-time tracking and bulk order processing.
SKULabs is a multichannel inventory, warehouse and order management tool with Android and iOS apps for picking, labels and tracking on the go.
Key features
- Workflows for packing, processing and shipping
- Barcode-based fulfillment and returns
- Bulk PO creation with reorder suggestions
Pros
- Strong warehouse execution, including barcode scanning
- Responsive support and clear documentation.
Cons
- Gets expensive as you scale
- Some users mention feature gaps and onboarding friction.
Pricing: Basic $299/month, Pro $999/month, Enterprise $1,999/month.
Best for: warehouse-heavy and multichannel businesses with fulfillment complexity.
4. Assisty
TL;DR: AI forecasting across multiple stores and locations, with support for bundles.
Assisty is an AI inventory management and planning tool for multi-store and multi-location replenishment.
Key features
- Forecasts from historical data, seasonality and events
- Multi-location tracking with inter-location transfers
Pros
- Knowledgeable support
- Easy to set up
Cons
- Pricing and entitlement changes frustrate some users
- Some reviews mention lag and errors.
Pricing: Pricing depends on your Shopify plan. For Shopify plus, plans start at $99/store/month
Best for: multi-location brands, bundle sellers, operators running several warehouses.
5. Inventory Planner
TL;DR: Forecasting and buying recommendations, with vendor-specific POs generated from your sales data.
Inventory Planner automates forecasting, replenishment and PO creation, and balances stock across locations.
Key features
- Forecasts by seasonality, trend and product performance
- Recommendations on what, when and where to order
- POs with vendor minimums and cost prices
Pros
- Turnover and cash-flow planning
- Replenishment across locations
Cons
- Expensive for smaller budgets
- Data sync delays and a complex forecast setup
Pricing: Available on request
Best for: mid-market brands, financial inventory planning, seasonal demand. Looking beyond it? See the top Inventory Planner alternatives.
6. Cin7 Core
TL;DR: Suits hybrid D2C and B2B businesses that want inventory and cost tracking in one system.
Cin7 is both an inventory and order management platform that helps businesses manage stock, purchasing, warehousing, and sales across multiple channels. It offers ERP-like capabilities, including manufacturing, POS, and accounting integrations.
Key features
- Full view of production costs and stock status
- Live inventory updates
Pros
- Unifies inventory, orders and channel data
- Built-in barcode scanning
Cons
- Some advanced inventory, forecasting and automation capabilities require higher tiers or paid add-ons
- Check Shopify connector coverage and implementation needs before committing
Pricing: Cin7 Core starts at $349/month, Pro at $599/month and Advanced at $1,199/month, excluding taxes; some forecasting and automation features cost extra.
Best for: hybrid B2B + D2C brands with operational complexity. See the best Cin7 alternatives for Shopify brands.
7. Katana
TL;DR: For brands that manage manufacturing and inventory together, with real-time visibility into stock, production schedules and orders.
Katana brings sales, production and accounting into one platform, and sends financial data to QuickBooks and Xero.
Key features
- Shop floor control
- Production schedules, costs and stock levels
- Real-time inventory across locations, B2B and B2C
- Forecasts from historical data
Pros
- Manufacturing-native replenishment
- Dedicated onboarding specialist
Cons
- Reviews mention missing features
- Some users report QuickBooks and Shopify integration issues
Pricing: Available on request
Best for: manufacturers, brands managing raw materials, production-focused operations.
Which Inventory Replenishment Software Is Best for Your Business?
When Do Spreadsheets Stop Working For Replenishment?
Spreadsheets can work for a small catalog. But as SKUs, warehouses and suppliers grow, manual updates can miss shifting demand and reorder dates, putting bestsellers at risk of stockouts.
The common signs
- Stockouts are creeping up
- Your SKU count keeps growing
- You've added a second warehouse or location
- Bundles or kits make the math messy
- You're building purchase orders by hand
- Supplier lead times keep shifting
- Stock counts don't match across channels
If several of these problems recur, compare replenishment software against the time, stockouts and excess inventory your manual process is costing you.
What Features Should Inventory Replenishment Software Have?
- Real-time inventory tracking: Live syncing across channels and stores stops overselling and gives every reorder decision current numbers.
- Demand forecasting: Forecasts based on sales history and seasonality tell you what you'll need and when accurately.
- Multi-location support: If you run several warehouses or stores, you need stock visibility by location.
- Purchase order automation: POs generated from reorder suggestions cut manual work and missed reorder dates.
- Inventory health reporting: The best tools flag slow movers, overstock risk, stockout risk and the carrying cost of excess stock.
- Integration flexibility: Look for clean connections to your ecommerce, accounting, warehouse and logistics tools.
Common Inventory Replenishment Automation Mistakes and How to Avoid Them
Most replenishment problems come from the process. And automation doesn't fix bad inputs; it just repeats them faster. Some of the common mistakes include.
Not sure how much buffer to hold? Here's how to calculate safety stock for your Shopify store. And if you want to take manual work out of the rest of your workflow, start with automated inventory management.
How to Set Up Automatic Stock Replenishment on Shopify?
Shopify offers inventory tracking and purchase-order workflows, but automatically calculating reorder points, supplier-aware recommendations and ongoing replenishment alerts typically requires an app.
Here's the setup, start to finish.
Step 1: Install a replenishment app
Pick an app that syncs with your catalog, sales history and inventory levels, including in-transit units. Once connected, it should show days left before stockout, the best reorder date, and a recommended quantity per SKU, so you don't have to do manual calculations.
Step 2: Configure your inputs
Enter lead times per supplier or product, your days of cover (how many days of sales you want in stock), safety stock levels and warehouse locations. These inputs drive every reorder suggestion that follows.
Step 3: Set up dynamic low-stock alerts
Static reorder points don't change unless you change them. Dynamic ones recalculate from sales velocity, incoming POs and supplier lead times, so you're warned based on when stock will actually run out.
Example: A Shopify brand sells 20 units a day, its supplier takes 10 days to deliver, and it holds 50 units as safety stock. Reorder point = (20 × 10) + 50 = 250 units.
That means it should reorder when its inventory position (on-hand plus incoming stock minus backorders) falls to 250 units. A replenishment tool can recalculate the threshold when demand or lead times change.
Step 4: Create POs straight from the alert
When a SKU is flagged, review the recommended quantity and raise the PO from the same screen. Supplier details, costs and expected delivery dates should fill in automatically.
Step 5: Monitor and refine
If a supplier slows down or a product suddenly takes off, update lead times or coverage days. New reorder suggestions should follow from the updated numbers.
In Prediko, this whole loop runs from the Buy Tab: each SKU is tagged Healthy, At Risk, Stockout or Overstock, and you can select every "Buy Now" SKU and create a pre-filled PO in one click. The result is fewer missed reorder dates and less time in spreadsheets.
💡 Want to dig deeper? Here's our guide to the replenishment process for Shopify.
Why Automatic Replenishment is No Longer Optional
Replenishment gets ignored until it causes a stockout, a missed sale or a long afternoon in spreadsheets. As your catalog grows and supplier timelines move, manual tracking falls behind.
The right tool doesn't just place reorders. It shows you purchase orders, demand trends and supplier performance in one place, so you're planning 10 steps ahead instead of firefighting.
Prediko is built to do exactly that for Shopify brands. Start your 14-day free trial and see how it fits your replenishment workflow.
Frequently asked questions
What is inventory replenishment software?
Inventory replenishment software tracks stock levels and tells you when and how much to reorder, based on sales velocity, supplier lead times and safety stock. Most tools can also generate the purchase order.
How does inventory replenishment work?
It compares sales data, current stock and supplier lead times to calculate reorder points, then generates purchase orders when stock hits them. It can run manually or automatically.
Can Shopify automate stock replenishment on its own?
No. Shopify tracks inventory but doesn't calculate reorder points, track lead times or suggest what to order. You need a replenishment app connected to your store.
What is the best inventory replenishment software for Shopify?
Look for a tool that integrates directly with Shopify, forecasts demand and automates purchase orders for a growing catalog. Prediko is built for this; Fabrikator and Inventory Planner are other Shopify options.
Which replenishment tools support multichannel ecommerce?
Multichannel support varies by vendor and plan. Before choosing, confirm which marketplaces, warehouses, WMS tools and inventory data flows each integration supports.
How can automatic replenishment go wrong?
It fails when its inputs are wrong. Outdated lead times, stale sales data or safety stock that no longer fits will trigger orders too early or too late, causing overstock or stockouts.
How do AI tools improve replenishment?
AI analyzes demand patterns, seasonality and supply constraints continuously, so forecasts and reorder timing adjust as conditions change instead of waiting for a manual review
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