In this content series where I list the best monitoring tools available on the market especially those that are freemium or completely free for different purposes, today’s topic is Inventory Tracking & Back-in-Stock Notifications tools.
I’ve personally tested some of these tools myself. For the ones I haven’t used, I’ve carefully reviewed user feedback and analyzed the features listed on their official websites before including them here.
There are no sponsored tools in this list, so all positive or negative opinions I share are entirely my own subjective views.
Let’s dive in.
One of the most common issues on e-commerce platforms is failing to notify customers when out-of-stock products become available again. This leads to both lost sales and a decrease in customer satisfaction.
The good news is that many advanced tools today automatically track sold-out products and send email, SMS, or push notifications to customers when the item is back in stock. These tools can integrate not only with popular e-commerce platforms like Shopify, WooCommerce, or BigCommerce but also with general solutions that provide inventory tracking and notification management for any website.
Here are the most useful inventory tracking and automatic notification tools that stand out in 2025:
RobotAlp
Robotalp has been providing Uptime & Infrastructure Monitoring services for more than four years. However, with its major V3 update, the platform made a significant leap into the Web Signal Intelligence Landscape, now offering monitoring services across six distinct categories.
This transformation turned Robotalp into a highly attractive all-in-one monitoring solution for users who previously relied on multiple tools for different needs.
One of Robotalp’s biggest strengths is that it brings together 30+ different monitoring tools under a single subscription—offering remarkable flexibility and affordability.
And one of those monitors is the Inventory Tracking & Back-in-Stock Notifications tool.
Compatible Platforms: Website, API, Port (Flexible, platform-independent)
Key Features: Monitors uptime, keywords, and other digital properties. Its flexibility allows it to be configured for a variety of tasks, including the potential to monitor stock status changes. It operates on a pay-as-you-go credit system.
Advantage: Ideal for low-budget businesses, offering flexibility to monitor various digital assets.
Price: Pay-as-you-go, with a minimum payment of $16.
Swym – Back in Stock Alerts
Swym is one of the most popular solutions for e-commerce stores that want to re-engage customers and recover lost sales from out-of-stock products. Once installed, it automatically adds a customizable “Notify Me When Available” button to your product pages and collects visitor requests without requiring any coding. When the item is restocked, Swym instantly alerts interested customers via email or SMS, helping store owners convert intent into actual purchases. Beyond notifications, it also tracks customer behavior, providing insights into demand patterns and helping merchants optimize inventory planning.
Compatible Platforms: Shopify, BigCommerce, Magento
Key Features: Sends email or SMS notifications when a sold-out product is back in stock. It also provides user behavior analytics.
Advantage: Easy setup and in-platform integration.
Appikon – Back In Stock: Restock Alerts
Back In Stock: Restock Alerts is one of the most trusted and widely used stock alert solutions among Shopify merchants. The app allows stores to instantly notify customers the moment a sold-out product becomes available again through push notifications, SMS, or email ensuring no potential sale is lost. Its setup is quick and seamless, integrating smoothly with Shopify themes without requiring any coding. In addition to its reliable automation, Appikon provides detailed analytics on notification performance, helping store owners understand which products drive the most demand and improve their restocking strategies.
Compatible Platforms: Shopify
Key Features: Provides multi-channel notifications to users with instant push notifications, SMS, and email options.
Advantage: One of the highest-rated stock notification apps for Shopify.
HotStock
HotStock is a powerful real-time product tracking platform designed for consumers looking to grab high-demand or limited-stock items before they sell out. Operating as both a web and mobile application, it continuously monitors availability across multiple online retailers and instantly alerts users the moment a product is restocked. From gaming consoles and graphics cards to exclusive sneakers, HotStock covers a wide range of categories and supports region-specific alerts, allowing users to receive notifications only for stores that ship to their area. Its reliability and speed make it especially popular among shoppers who want a competitive edge during restocks and product launches.
Compatible Platforms: Web and mobile application (independent)
Key Features: Tracks the global stock status of popular and limited-stock products (e.g., consoles, graphics cards).
Advantage: Alerts can be customized by geographic location.
SpurIT – Back in Stock Alerts
SpurIT – Back in Stock Alerts is a sleek and reliable Shopify app that helps store owners recover lost sales by keeping customers informed when sold-out items return to stock. It automatically adds a “Sold Out Notify Me” button to product pages, allowing shoppers to subscribe for updates with just one click. Store owners can fully customize both the design and timing of the notifications to match their brand identity and communication style. Thanks to its seamless integration with Shopify themes and intuitive setup, SpurIT delivers a professional, on-brand experience without requiring any technical effort.
Compatible Platforms: Shopify
Key Features: Adds a "Sold Out - Notify Me" button to product pages, with customizable notification timing and content.
Advantage: Offers visually customizable integration to match the theme.
Notify Me – Back in Stock Notifications
Compatible Platforms: Shopify, WooCommerce
Key Features: Creates waiting lists and provides email and SMS notifications.
Advantage: Works both through its own site and via store integration.
Visualping
Compatible Platforms: All websites (platform-independent)
Key Features: Detects changes on a specific page (e.g., "Sold Out" → "In Stock").
Advantage: Can be used outside of e-commerce. It is also functional for scenarios like competitor product monitoring and price tracking.
Timesact, REZ, Stoq (Shopify Apps)
Compatible Platforms: Shopify
Key Features: Automatic stock tracking, customizable notifications based on customer segments, and pre-order and waiting list management.
Advantage: Offers more advanced customization and analysis capabilities.