Top 10 Low Stock Alert Apps to Prevent Stockouts

Ever had that heart skip when a customer places an order… and you realize the item’s out of stock?

You’re not alone, it happens to the best eCommerce brands.

And it’s not just about losing a sale, it’s the ripple effect: support tickets, refunds, bad reviews, and a hit to your reputation.

That’s where low stock alert software comes in, not just to warn you, but to work with you, giving you the heads-up before your shelves go silent.

Whether you're scaling fast or flying solo, this list covers the best apps to help you catch low inventory early, restock smarter, and never lose sleep over surprise stockouts again.

Why Low Stock Alerts Are Critical for eCommerce

Low stock alerts act like an early warning system. Instead of realizing you're out of your best-seller after a customer tries to buy it, you get notified before it happens, giving you time to reorder, restock, and keep your sales flowing.

Here’s why they matter:

• Avoid stockouts before they happen: Protect your best-selling products from going dark unexpectedly.
• Keep customers happy: If they find what they want is always in stock, they’ll come back for more.
• Streamline your restocking process: Know exactly when to reorder and what to prioritize.
• Support multi-location accuracy: Especially critical if you sell across channels or fulfill from different warehouses.
• Free up your brain: Instead of constantly checking inventory, trust alerts to keep you in the loop.

In short, low stock alerts are a simple but powerful tool to keep your operations smooth, sales steady, and stress levels low.

Key Features to Look for in a Low Stock Alert Tool

Choosing the right low stock alert tool isn’t just about getting a notification, it’s about getting the right notification at the right time, in a way that fits your business.

Below are the key features to consider:

Real-Time Notifications

Delays can cost you sales. A good tool should send alerts as soon as inventory dips below your set threshold, not hours later.

Custom Thresholds per Product or Location

Every product moves differently. You should be able to set low stock levels by SKU, variant, or even location to get more accurate and meaningful alerts.

Multi-Channel and Multi-Location Support

If you sell across Shopify, Amazon, Etsy, or use multiple warehouses, make sure your tool supports all your fulfillment points and keeps everything in sync.

Flexible Alert Delivery (Email, Slack, SMS)

Your team works across different tools, your alerts should too. Look for options to receive notifications via email, Slack, SMS, or even in-app dashboards.

Easy Setup and Clean UI

An alert system shouldn’t need a developer. Prioritize apps that are easy to install, configure, and understand, especially for fast-paced eCommerce teams.

Let’s walk through 10 smart tools that make sure you never get caught off guard by a stockout again.

1. Sumtracker

Sumtracker is an all-in-one inventory management solution built for modern eCommerce brands selling on Shopify, Amazon, Etsy, and eBay. Among its many features, it offers fast and accurate low stock alerts to help merchants avoid stockouts and streamline reordering, all from a single, easy-to-use platform.

Key Features

• Instant low stock alerts by product and location
• Real-time inventory sync across multiple sales channels
• Built-in purchase order creation and vendor tracking
• Multi-location stock visibility
• Simple forecasting and actionable restock reports

Pros:

• Combines low stock alerts with complete inventory control
• Works seamlessly across Shopify and marketplaces
• Optimized for mobile, great for managing on the go
• Fast onboarding and responsive support team

Cons:

• Advanced forecasting tools are still evolving
• Doesn’t support bin-level or expiry tracking

Pricing: Starts at $49/month, includes free trial.

2. Stockie

Stockie is a lightweight Shopify app built specifically for sending low stock alerts to store owners via email and Slack. It’s quick to install and great for small stores looking for basic alert functionality.

Key Features:

• Custom alert thresholds per product or variant
• Slack and email notifications
• Simple configuration with no bloat

Pros:

• Clean, beginner-friendly UI
• Fast to set up
• Budget-friendly for small stores

Cons:

• Limited to Shopify
• No forecasting or bulk export options

Pricing: Free plan available; paid plans start at $5/month.

3. Ordersify

Ordersify is a Shopify app that automates low stock alerts and restock workflows. It’s ideal for merchants who want customizable alerts and automated purchase order logic.

Key Features:

• Real-time low stock alerts via email
• Auto-send restock requests to vendors
• Custom alert rules by product, vendor, or location

Pros:

• Time-saving automation
• Great for stores with multiple suppliers
• Versatile configuration

Cons:

• Steeper learning curve
• Works only with Shopify

Pricing: Free plan with limited features; paid plans start at $9.99/month.

4. Notify Me

Notify Me helps Shopify merchants avoid stockouts by providing internal alerts for low stock levels. While originally designed for customer waitlists, it now includes strong low stock notification tools for store owners too.

Key Features:

• Low stock email and Slack alerts
• Reorder reports
• Optional customer waitlists for sold-out products

Pros:

• Dual benefit: notify team + waitlist for customers
• Easy to use
• Custom threshold settings

Cons:

• Not focused solely on internal use
• No restock automation or forecasting

Pricing: Free plan available; paid plans start at $9/month.

5. Merchbees Low Stock Alert

Merchbees is a popular Shopify app that sends low stock alerts through email, Slack, and Teams. It supports detailed threshold logic and location-specific alerts, making it ideal for stores with multiple warehouses.

Key Features:

• Alerts based on variant, location, or vendor
• Multiple notification channels (email, Slack, MS Teams)
• Daily summary reports

Pros:

• Flexible and reliable alerting
• Works well for large catalogs
• Easy to set thresholds across locations

Cons:

• Shopify-only
• No automation or forecasting logic

Pricing: Free plan for up to 3 alerts; paid plans start at $9.99/month.

6. StockBot

StockBot is a basic Shopify app that emails daily stock summaries to merchants. It’s ideal for sellers who prefer regular updates over real-time notifications.

Key Features:

• Daily low stock summary emails
• Location-based alerts
• Simple product selection logic

Pros:

• Simple to set up and manage
• Ideal for routine stock checks
• Affordable option for smaller stores

Cons:

• No real-time alerts
• No integrations or automation

Pricing: $5/month after 7-day free trial.

7. iAlert

iAlert is a Shopify app that tracks inventory levels and notifies store owners when products fall below defined thresholds. It's suited for smaller catalogs that need straightforward stock monitoring.

Key Features:

• Email-based low stock notifications
• Product- or collection-level threshold rules
• Bulk alert settings

Pros:

• Quick install and setup
• Good for small teams
• Inexpensive and reliable

Cons:

• Only supports email notifications
• No restock workflow or channel integration

Pricing: $4.99/month; includes 3-day free trial.

8. BirdChime

BirdChime lets Shopify merchants customize low stock alerts using tags, vendors, or collections. It’s highly configurable and works well for larger stores with complex catalogs.

Key Features:

• Low stock alerts via email or dashboard
• Filter by vendor, variant, tag, or collection
• Real-time tracking and alert logic

Pros:

• Advanced filtering options
• Real-time accuracy
• Great for high-SKU operations

Cons:

• Interface can feel dated
• Limited documentation or support resources

Pricing: Flat rate of $9.99/month.

9. LSA Low Stock Alert

LSA Low Stock Alert is a Shopify app designed to notify merchants when inventory levels fall below custom thresholds. It’s built for store owners who want quick, no-fuss alerts without dealing with complex dashboards or automation.

Key Features:

• Custom low stock thresholds per product
• Email notifications for single or multiple recipients
• Works with all Shopify plans
• Simple dashboard view of low inventory items

Pros:

• Lightweight and easy to configure
• Perfect for solopreneurs or small teams
• Inexpensive for its functionality

Cons:

• Only supports email notifications
• No multichannel or restock automation features

Pricing: Starts at $4.99/month with a free trial included.

10. Low Inventory Alert Guru

Low Inventory Alert Guru is a simple Shopify app that helps store owners stay informed with scheduled and real-time low stock alerts. It’s ideal for users who want no-code setup and easy email notifications.

Key Features:

• Alerts by product, variant, or collection
• Supports multi-location (POS included)
• Email reports with CSV or PDF export
• Scheduled or on-demand alerts

Pros:

• Easy to set up and use
• Supports unlimited SKUs
• Responsive customer support

Cons:

• No forecasting or PO features
• Alert credits limited by plan

Pricing: Starts at $6.95/month with a 14-day free trial.

Why Every eCommerce Business Should Use Low Stock Alert Software

In eCommerce, stockouts don’t just cost you a sale, they cost you customer trust, disrupt your fulfillment flow, and create panic restocking. Low stock alert software helps you stay in control by notifying you before things go wrong.

Here are the top benefits, plus quick tips to get the most out of them:

Protect Revenue by Preventing Stockouts

Stockouts hurt not just your sales, but your customer experience. With low stock alerts, you get notified before inventory runs out, giving you time to reorder without missing a beat.

Quick Tip: Set different alert thresholds for fast vs. slow-moving SKUs so your best-sellers are never at risk.

Restock Smarter Not Harder

Guessing what to reorder can lead to overstocking slow-movers or understocking high-performers. Alerts help you make timely, informed purchasing decisions based on actual sales trends.

Quick Tip: Pair low stock alerts with weekly restock reports to plan POs more efficiently.

Save Time by Automating Inventory Monitoring

Checking inventory manually every day? That’s time you’ll never get back. Alerts work in the background and notify your team only when attention is needed.

Quick Tip: Set alerts to go directly to team members responsible for restocking or purchasing, not just the store owner.

Keep Your Customers Coming Back

When a customer hits “Add to Cart” and sees “Out of Stock,” there’s a good chance they won’t return. Low stock alerts help you keep popular items in stock and trust intact.

Quick Tip: Identify your top 10% revenue-generating products and set tighter thresholds for those first.

Stay in Sync Across Channels and Locations

Selling on Shopify, Amazon, or from multiple warehouses? Alerts ensure you’re tracking stock everywhere, reducing overselling, duplicate orders, and fulfillment chaos.

Quick Tip: Choose a tool that supports multi-location tracking if you use separate inventory for online and POS.

Conclusion

Inventory issues can sneak up fast but with the right low stock alert app, you’ll never be caught off guard again.

Whether you're a small Shopify store or managing inventory across Amazon, Etsy, and multiple warehouses, these tools help you stay proactive, reduce stress, and protect your bottom line.

From simple email alerts to advanced restock workflows, there’s a solution out there that fits your workflow and budget.

Start with what your business needs most: speed, accuracy, or multi-channel control and build from there.

Because in eCommerce, being out of stock shouldn’t mean being out of options.

FAQS

1. What is a low stock alert and why do I need it?

A low stock alert is a notification you receive when a product’s inventory drops below a set threshold. It helps eCommerce businesses avoid stockouts, improve restocking efficiency, and maintain customer satisfaction by ensuring popular products are always available.

2. Can I set different low stock thresholds for each product?

Yes. Most low stock alert tools like Sumtracker allow you to set custom thresholds per product, variant, or even location. This helps you prioritize restocking based on sales volume or business needs.

3. Do low stock alert apps work with multiple sales channels like Amazon or eBay?

Some apps lare designed for multichannel sellers and support platforms like Amazon, eBay, and Etsy in addition to Shopify. Others are Shopify-only, so it’s important to choose a tool that matches your setup.

4. Will I get alerts in real time or just daily summaries?

That depends on the app. Tools like Sumtracker, Ordersify, and Merchbees support real-time alerts, while apps like StockBot offer daily email summaries. Choose based on how urgently you want to act on low inventory.

5. Do low stock alert tools help with reordering too?

Some apps go beyond alerts by offering integrated restock workflows, purchase order creation, and even demand forecasting. For example, Sumtracker and Ordersify make it easy to generate POs once you receive an alert.

‍