To automate inventory restocking in Shopify, start by enabling inventory tracking and connecting a restocking app.
The app uses sales velocity, supplier lead times, and safety stock to monitor inventory, recommend what to reorder, and help create purchase orders before products run out.
Because nothing frustrates a customer more than placing an order, only to find out days later that the product is out of stock. And for Shopify brands managing 100s or 1000s of SKUs, manually tracking inventory and remembering when to reorder can quickly lead to these mistakes.
That's where automated inventory restocking comes in. In this guide, we'll walk through how to restock inventory in Shopify, automate the process, and choose the right tools to keep your bestsellers available without overstocking.
Why Automate Inventory Restocking?
Manual restocking works when you're small. You count stock, update a spreadsheet and email suppliers when something looks low. Then it starts to crack:
- Stockouts cost sales. If a shopper can't buy it from you, they'll buy it from a competitor and may not come back.
- Overstocking ties up cash. Extra units mean storage costs and money you can't use elsewhere. For seasonal or perishable products, they can end up as dead stock.
- Demand is unpredictable. Trends, promotions and seasons make it hard to guess how much you'll need.
- Manual processes don't scale. Spreadsheets get messy as SKUs, channels and suppliers multiply.
Automation fixes this by giving you a real-time view of stock, forecasting demand, triggering reorders on time, and removing manual entry and guesswork.
Restocking vs back-in-stock notifications
These get mixed up, but they solve different problems:
- Restocking is your side: buying more stock from suppliers.
- Back-in-stock notifications are the customer's side: emailing or texting shoppers when a sold-out product returns.
You'll often want both. For the customer side, here are the best Shopify back-in-stock apps.
What Features Should an Inventory Restocking Tool Have?
- Real-time inventory tracking: up-to-the-minute stock levels, with alerts when a SKU drops below your threshold.
- Demand forecasting: predictions from sales history, trends and seasonality, so you order the right amount.
- Automatic POs and supplier notifications: reorder triggers that create and send purchase orders without you building them by hand.
- SKU-level insights: which products sell fast and which are slow, so you prioritise bestsellers and cut back on slow movers.
- Cash-flow-aware timing: reorder dates that line up with your budget, so you spend on the stock with the best return.
- Integrations: clean connections to Shopify, other sales channels and accounting tools, so stock and financial data stay in sync.
Want the full picture? Here's our guide to automated inventory management software.
What are The Best Inventory Restocking Apps for Shopify?
1. Prediko's AI Inventory Management App
Prediko is an AI inventory management app that goes beyond restocking. It covers forecasting, purchasing and raw materials too.
- Buy Tab: tells you what to buy, when and how much, with low-stock alerts when it's time to restock.
- AI demand and supply planning: spreads your revenue target across the next 12 months using sales history, seasonality and growth trends. Also builds a yearly PO calendar.
- Insights and analytics: reports on product performance, late or due POs and excess SKUs, plus 100% customizable analytics dashboards for relevant teams.
- Purchase order management: create POs from the Buy Tab in one click, track them in real time and contact suppliers from the app or by email.
- Raw materials management: manage bills of materials and made-to-order production, and forecast material demand.
Using Prediko, you restock on time, with less cash tied up in slow stock. Start 14-day free trial.
2. Sumtracker
Sumtracker is an inventory management tool ideal for both single-store and multi-store owners. It allows you to sync and restock inventory across platforms like Shopify, Amazon, Walmart, eBay, and Etsy.
The platform also makes managing product bundles easy by automatically updating inventory based on bundle components.
3. Assisty
Assisty is yet another inventory management and planning tool that allows you to keep your inventory in line with actual demand. It delivers precise reorder suggestions based on factors like sales data, vendor lead times, inventory thresholds, and seasonal trends.
The tool offers customizable settings for you to adjust inventory management workflows to your specific needs, from setting reorder points to forecasting demand.
4. BrightStock
BrightStock is a dedicated inventory restocking software that allows you to schedule automatic restocks.
You can search through your SKUs, select the products, and choose restock frequency, whether it's once, every few days, weeks, months, or even years. You can also set the restock quantity as a fixed amount or automatically adjust based on existing stock.
5. Qoblex
Lastly, we have Qoblex, an inventory management software that allows you to connect multiple sales channels to one master inventory, which automatically adjusts according to sales.
The platform alerts you when products fall below reorder points, helping prevent stockouts. With reorder and stock-on-hand reports, you can better plan future purchases and backorders. Qoblex also makes it easy to track and manage bundles and their components.
How Do You Restock Inventory on Shopify (and Automate it)?
Step 1: Turn on inventory tracking in Shopify
Automation starts with accurate counts.
- In your Shopify admin, open each product and turn on inventory tracking in its Inventory section.
- Enter the quantity you currently have for each variant and location.
- If you have several warehouses or stores, set them up as locations first.
💡 Many merchants assume Shopify is already tracking stock when it isn't. Here's how to fix inventory that isn't being tracked on Shopify.
Step 2: Choose the right app for your store
Pick an app that integrates with Shopify and fits your complexity (multiple channels, bundles, raw materials). Write a checklist of the features you need now and in a year, then use free trials to test before committing.
If you sell on more than one channel, make sure the app syncs stock across every one of them, so you don't oversell on one and undersell on another.
Step 3: Install the app and set your automation rules
Install from the Shopify App Store, then follow the setup:
- Connect your sales channels and import existing inventory
- Add suppliers, including lead times and minimum order quantities (MOQs)
- Set up warehouse locations
- Define reorder points by product type and sales velocity or keep it dynamic if the apps allows
- Choose how and where you want to be notified
How to set a reorder point: if you sell 10 units a week and your supplier takes two weeks, you'll sell 20 units before a new order arrives. Set your low-stock alert at 25-30 units to keep a buffer. Fast movers might trigger a restock at 30% of stock remaining; slow movers can wait until 15%.
For seasonal items, build rules from both last season's sales and your forecast for this one. Document every rule so the team knows why it's set that way.
You can use Shopify Flow to set up basic low-stock alerts and notify your team when inventory falls below a certain threshold. However, you'll still need to decide the right reorder point for each SKU, review it regularly, and manage replenishment.
Want to skip building and maintaining these workflows? Prediko does the heavy lifting. Its AI agent Pia monitors stock, sends low-stock alerts and scheduled reports via Slack, WhatsApp, or email, and helps you create POs before you run out.
Step 4: Test and monitor
Run a pilot on 5-10 products for a few weeks. Watch for missed alerts or wrong counts, then expand gradually. Keep auditing as you scale as automation still needs a human checking it, so agree in advance what triggers a manual review.
How do You Optimize Inventory Restocking Over Time?
1. Move from fixed reorder points to demand-based replenishment
A fixed reorder point might work today, but what happens when sales suddenly double or a promotion is coming up?
Instead of relying only on static stock thresholds, use AI demand forecasting to account for sales trends, seasonality, upcoming promotions, and expected demand.
Tools like Prediko use these signals to recommend what to reorder, when, and how much, so you're not constantly adjusting rules by hand.
2. Account for supplier delays and incoming inventory
A low-stock alert doesn't always mean you need to place another order. You might already have enough stock arriving next week.
Your restocking system should consider incoming POs, supplier lead times, and stock already available across locations before recommending another purchase.
Keep supplier lead times and expected delivery dates accurate so your recommendations reflect what's actually coming.
3. Let AI monitor inventory and flag exceptions
Instead of checking dashboards every day, set up automated checks for stockout risks, excess inventory, delayed POs, and products running low on days of cover.
With Prediko's AI agent Pia, you can schedule these checks and get updates directly on Slack, WhatsApp, or email. You can also ask Pia to create purchase orders or generate inventory reports without digging through multiple screens.
The goal isn't to automate every purchase blindly. It's to let AI handle the monitoring and repetitive work while your team focuses on decisions that need human judgment.
Why does automation matter as you scale?
- Lower operational overhead. As orders grow, so does time spent on POs, supplier emails and stock checks. Automation absorbs that work, so a team that spent 15 hours a week on inventory can put that time into customers, marketing or growth.
- Happier, more loyal customers. Products are in stock when shoppers want them, so orders ship on time and repeat purchases follow.
- More SKUs and channels without chaos. When you add product lines, marketplaces or retail stores, restocking stays coordinated across all of them.
How Lori Beds Eliminated Unexpected Stockouts with Prediko
Lori Beds, a Murphy bed brand, needed a more reliable way to forecast demand and plan inventory. With long replenishment cycles, getting purchase quantities or timing wrong could mean running out of stock when customers were ready to buy.
After switching from Inventory Planner to Prediko, the team gained clearer visibility into future demand, incoming inventory, and purchasing needs. AI-powered forecasts and replenishment recommendations helped them plan orders ahead of time instead of reacting when stock was already running low.
The result was zero unexpected stockouts and 90% more reliable supply planning. Read the full story here.
Automate Restocking for Your Shopify Store
Automated restocking takes repetitive work off your plate while cutting stockouts, excess inventory and fulfillment delays. Start with accurate tracking, pick an app that fits, set honest rules and keep reviewing them.
Ready to start? Try Prediko free for 14 days.
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