#backinstockalerts

Having assisted a number of e-commerce owners in optimizing their Shopify stores, I am often asked what tools are there to deal with out-of-stock situations. In 2025, with the online shopping boom, an effective back-in-stock app will help you notify customers regarding restock availability, making a huge difference in lost revenue. 

Based on the app features, user reviews, and integrations with Shopify, here is my rundown of the 5 best Shopify back-in-stock apps. I'll also touch on why you need an app, things to look for, the benefits of an app, and details of each app discussed. I will aim to be succinct and lead to solutions.

Why Use a Back-in-Stock App?

Out-of-stock issues are widely cited. Research indicates that 8% of products are typically out of stock at any given time, which results in abandoned carts (approximately 70% of all carts are abandoned). When customers encounter these situations without resolution, they have no choice but to move to a competitor. A back-in-stock app for Shopify fixes this by allowing customers to sign up for out-of-stock notifications. For instance, if a product sells out, they can receive a notification when the product returns to stock, effectively sending them back to your store to purchase the product.

In 2025, the global e-commerce market will reach all-time highs in sales, and these apps will be paramount to your business. In addition to recovering sales, studies have shown that back-in-stock apps increase sales by 10-20% in some cases. They also improve the customer experience, and it helps you purchase smarter by collecting sign-up data. It serves as a simple net to convert frustration into sales.

Benefits of Back-in-Stock Alerts

These aren't just notifications; they offer real advantages:

Sales Recovery: Re-engage customers who may otherwise shop somewhere else.

Better Customer Experience: Customers feel important while receiving updates promptly, creating loyalty.

Urgency and Excitement: Low-stock bars or timers create an artificial sense of scarcity.

Inventory Insight: Sign-up lists show what's hot, keeping you from over-ordering or hitting stockouts.

Less Work: It automates it all for you, allowing you to focus on scaling your business. Overall, it will help streamline your store in a very competitive space.

Top 5 Shopify Back-in-Stock Apps for 2025

I have provided a detailed rundown of some of the best ones, looking at their features, user review feedback (from the app store), and functionality. I have also outlined how they function, their features, and their benefits. 

1 - SB Coming Soon Product-PreSale: Add countdown clocks or “Coming Soon” badges to product pages. The “Notify Me” button shows up for items that are low or out of stock, and they send out alerts automatically when they are restocked! 

Features: custom badges for products/collections, displays arrival dates, unlimited email alerts, Klaviyo/Mailchimp integration, multi-language support, and no send limits. 

Benefits: great for building excitement in advance of launch; simple to configure without coding; works for global stores. Users appreciate the timers; they help engage visitors. (4.8 stars from 150+ reviews; free plan is limited by products.)

2 - Notify! Back in Stock|PreOrder: Automatically adds "Notify Me" or "PreOrder" buttons to sold-out pages for your customers. Customers can receive email, SMS, or push alerts when the item is back in stock, and we even accept pre-order payments! 

Features: Partial payments for pre-orders, wish lists for site visitors, low stock widgets, custom emails and buttons, and unlimited pre-orders for paid plans. 

Benefits: Traffic generation or wish lists, customer demand data, and reduced manual work. Best suited for eCommerce Stores that frequently run out of stock. (4.9/5 from 2,500+ reviews; Free plan limits notifications).

3 - Back In Stock, Notify Me: Kbite: Adds custom "Notify Me" buttons to out-of-stock items; when restocked or price drops, automatically notifies subscribers; builds waitlists for data reporting. 

Features: Automated alerts, price drop notifications, waitlist insights, email list integration, and unlimited sign-ups on the free plan. 

Benefits: Recovers revenue while building your email/SMS list, customizable to fit your website's branding; cost-friendly SMS pricing. Good for data-driven decision making. (5 stars from 2,800+ reviews, branding on free plan.)

4 - Preorder, Back In Stock - STOQ: Includes preorder/notify gadgets; can take deposits and send notifications via email/SMS when back in stock; can work with a multitude of locations. 

Features: pre-ordering payment-enabled; custom messages; Klaviyo integration; unlimited alerts on pro plans; 24/7 support. 

Benefits: earn revenue before your stock arrives; perfect for international sales; reliable support when you need it. Easily handles complex settings. (5 stars from 2,100+ reviews; fee for sms.)

5 - Preorder, Back in Stock Duck: Pre-orders on low-stock products; item-specific notifications via email or WhatsApp when stock replenishes. 

Features a verb as trigger notifications by item variant availability, WhatsApp integration, automatically processes stock replenishment, and a simple setup with Klaviyo support. 

Benefits are demand measurement, fast product updates, and simplicity for beginners. Great for audiences who have a higher mobile preference. (Great rating; limits for basic plans.)