Top 5 Shopify Back In Stock Apps

Quick Summary: Just because you are out of stock doesn’t mean you will lose your customers forever. A good back-in-stock app for Shopify will automatically send back-in-stock alerts to disappointed shoppers and turn them into engaged and happy customers. In this article, we will discuss the five best back-in-stock notifications for 2025, so you can choose the best app for you to take advantage of the demand for products you offer and more sales.

In the fast-paced world of e-commerce, running out of stock can hurt your sales. Think about a customer who is ready to purchase but finds that the product is out of stock; they may continue to shop and purchase it somewhere else. This is where a Shopify back-in-stock app can be helpful. These apps send back-in-stock alerts and back-in-stock notifications, so customers will come back to purchase it.

With global e-commerce sales set to hit $7.5 trillion, and more than half of online shoppers facing out-of-stock products, using these apps is smart. They help to recover lost sales and boost your store’s growth. (Source)

This blog dives into why you need a Shopify back-in-stock app, how to pick the best one, and the top five options. We will look at their features, benefits, and more. Let’s explore how these apps solve out-of-stock problems.

Why You Need a Back in Stock App for a Shopify Store

Stockouts happen often in online stores. Did you know the average stockout rate is about 8% for e-commerce businesses? This means one in every 12 items might be unavailable. For Shopify stores, this can lead to lost money. In 2025, with 2.77 billion people shopping online, you can’t afford to miss sales. (Source)

A back-in-stock alert app on Shopify allows customers to subscribe to a notification for when an item is back in stock. Instead of losing them as a customer, you recover them once the product restocks. For instance, if a best-selling shirt sells out, the app sends an email or SMS when it resupplies. This makes frustration into elation.

69% of online shoppers will switch to a competitor if an item is out of stock. But with back-in-stock notifications, you keep them loyal. These apps also help you understand demand. If many sign up for alerts on one product, you know to order more next time.

In 2025, inventory levels rose 26% year-over-year in the first quarter. This shows stores are stocking up, but surprises still happen. A back-in-stock app acts like a safety net. It works with Shopify’s tools, making setup easy. No coding needed for most. If you’re running a store, this app can increase sales by 10-20% just by recovering lost chances.

Think of it as a bridge between out-of-stock products and happy buyers. Without it, you risk high cart abandonment, around 70% on average. With it, you build trust and keep revenue flowing.

Criteria for Choosing the Best Shopify Back in Stock App

Finding the best Shopify back-in-stock app shouldn’t be complicated as long as you know what to pursue. First things first, you must look for usability. You need to determine that the app installs seamlessly and works with your theme. Also, determine if any coding is needed. If the app requires coding, you should probably stay away – at the very least, you may want an app that doesn’t require coding.

Second, you may want to look into features. Does the app send emails, SMS, or both? Is it possible to customize the “Notify Me” button? Integration is also important; the best apps will integrate with Klaviyo or Mailchimp for email marketing.

Finally, pricing is always important. Some apps come with free plans, many of which will only support stores below a predetermined revenue amount, while others come with per-month transaction-based pricing, and others may come with different plans for each usage. Once you take stock of these items, you can see if the reviews reflect your experience. Any app with a rating above 4.5 is a good sign.

Consider support. Good apps offer chat or email help. In 2025, with the Shopify app market growing, the focus will be on apps that handle real-time alerts. This saves time on manual checks. (Source)

Security and data privacy should be given. The app has to hold a compliance framework for the protection of customer information. Last but not least- consider testing for mobile-friendliness. Since most shoppers make purchases via their phones, make sure the app functions well on a mobile platform.

With these considerations, you will be able to source an app to accommodate your store. It should alleviate your out-of-stock notifications without placing additional load on your business.

Benefits of Using Back in Stock Alerts

Back-in-stock alerts offer many wins for Shopify stores. First, they recover lost sales. When a product sells out, alerts bring customers back to buy. This can boost revenue without extra ads.

Second, they improve customer experience. Shoppers feel valued when notified. No more checking the site daily. This builds loyalty and trust.

Third, alerts promote exclusivity. If someone sees an item that has limited stock, it makes it feel special, akin to a hot ticket to a concert. When customers receive the notification, they rush to purchase it.  

Fourth, alerts serve inventory planning, as the sign-ups represent demand. This will help you in your purchasing and stocking decisions, whereas you will be less likely to over-purchase or under-purchase inventory.    

Fifth, alerts help to reduce churn. Instead of losing a buyer to a competitor, you have kept them on your radar. This becomes especially important during peaks in demand, like holiday time.    

Back-in-stock alerts app can help you maintain what would be lost sales during product drop periods or seasonally. They also work with preorders, letting you sell before stock arrives.

Overall, these alert apps turn problems into chances. They make your store run smoother and grow faster in a busy market.

Explore the Best Shopify Back in Stock Apps

These are the five Shopify back in stock apps. Each helps with notifying customers about out-of-stock products, among other things. I will share descriptions, features, benefits, reviews, ratings, pros, and cons. This data is based on the latest app information.

1. SB Coming Soon Product‑PreSale

SB Coming Soon – Back In Stock app for Shopify helps increase pre-sales through countdown timers and “Notify Me” buttons on out-of-stock products. In addition to pre-orders, the app can send back-in-stock notifications through integrations with Mailchimp, SendGrid, and Klaviyo. The SB Coming Soon Product-PreSale app can also show when a product is arriving. 

This app is great if you want to build excitement and sales leading up to a launch without any email sending limitations. It works right in the Shopify admin and is compatible with the latest themes.

How It Works

This application provides badges and timers to pages. We can indicate when stock is low, and the status will turn to “Notify Me.” Notifications or alerts will be automatically sent out when inventory is restocked.

Features

• Provide the “Notify Me” button or “Coming Soon” badge on upcoming products and collections.
• When products and collections are in stock, display the arrival date and countdown timer on the product/collection page.
• Once the items are restocked, the app can auto-release the restock notification.
• Our application can integrate with Mailchimp, Klaviyo, SendinBlue, and Omnisend for unlimited back-in-stock notifications to auto email notifications.
• It supports scheduling auto-releases of out-of-stock products and multilingual options.
• Other apps have limitations in email notification; with this app, you can send unlimited email notifications.

Benefits

• Drives sales and excitement for pre-launch products.
• Ensures customers are notified when products are back in stock.
• Enhances customer engagement with countdown timers and “Notify Me” forms.
• Seamless integration with email tools for effective communication.
• User-friendly setup, requiring no coding skills, compatible with various store themes.
• Unlimited email notifications.

Reviews and Ratings

Average Rating: 4.8 out of 5 stars Total Reviews: 150+

Pros

• Effective for setting up “Coming Soon” or “Pre-Sale” products.
• Countdown timers and “Notify Me” forms boost customer engagement.
• Seamless integration with email tools like Klaviyo.
• User-friendly, no coding required, compatible with the latest themes.
• Responsive and efficient customer service, as noted by merchants.

Cons

• Free plan limited to a few products.

2 – Notify! Back in Stock|PreOrder

Notify enables Shopify stores to offer alerts for back-in-stock items, pre-order items, or wish lists for out-of-stock items. It automatically adds buttons to all your out-of-stock products for consumers to opt in to receive notifications via email or SMS. It also includes low-stock counter alerts to provide urgency, and it includes automated integrations for any workflows with our app. 

This provides a great way to recover your lost sales, grow your subscriber lists, and forecast demand while simplifying the process of optimizing your out-of-stock products and customer returns. 

How It Works

You can add a “Notify Me,” “PreOrder,” or “Wishlist” button on your store’s out-of-stock pages. It will automatically send auto Alerts via email/SMS/push notifications when the items return to inventory. You can put low-stock alerts and accept payments for pre-orders.

Features

• Pre-orders with partial payments.
• Wishlist for guests.
• Low-stock widgets.
• Custom emails and widgets.

Benefits

Boosts repeat visits through wishlists, customizes notifications to fit your brand, and provides data for better stock planning. It improves engagement without extra work.

Reviews and Ratings

Average Rating: 4.9 out of 5 stars Total Reviews: 2545+

Pros

• Unlimited pre-orders on paid plans.
• Multi-channel alerts (email, SMS, push).
• ROI guarantee on some plans.

Cons

• 10 notifications are included in the free plan, and for more notifications, pay a higher
• Higher plans are needed for unlimited use.
• Expensive for small stores.

3 – Back In Stock, Notify Me: Kbite

Back In Stock, Notify Me: Kbite provides back-in-stock notifications and price drop alerts specifically for Shopify users. Kbite integrates customizable buttons into your out-of-stock products that automatically send alerts via email or SMS once your stock is replenished. Kbite’s analytics let you track demand so you can have a better picture of their email size as well. 

Kbite takes seconds to install, recovers lost sales, and identifies the most in-demand products to streamline out-of-stock management for all retailers – no matter their size.

How It Works

Say “Notify Me” on out-of-stock products and alert users via email or SMS once you have that product in stock again. Kbite can also send price drop alerts via email or SMS to your customers and create waitlists to easily recognize your most popular products.

Features

• Automatic restock alerts.
• Price drop notifications.
• Waitlist analytics.
• Sync to mailing lists.

Benefits

Recovers sales from stockouts, grows your contact list, and gives insights into demand. Customization ensures it matches your store’s look.

Reviews and Ratings

Average Rating: 5 out of 5 stars Total Reviews: 2863+

Pros

• Free plan with unlimited sign-ups.
• Low SMS costs.
• Easy-to-use interface.

Cons

• Branding on a free plan.
• Email limits on basic tiers.
• 30 notifications in the free plan

4 – Preorder, Back In Stock ‑ STOQ

Preorder, Back In Stock – STOQ handles pre-orders and back-in-stock notifications for Shopify. It will add widgets to out-of-stock products so customers may waitlist the products or pay partially for an item. Emails or SMS can automatically be sent to customers once an item has been restocked, with other options available. 

The unstock analytics and integrations can help grow your waitlist and facilitate stock planning, making it easy to make out-of-stock issues a revenue opportunity.

How It Works

You may add preorder or notify buttons to out-of-stock items with flexibility for institute deposits and automatic alerts when items are restocked. Multiple locations and Klaviyo are supported.

Features

• Pre-order with deposits.
• Auto restock alerts.
• Custom widgets and emails.
• Klaviyo sync.

Benefits

Unlocks pre-sale revenue, builds waitlists, and offers 24/7 support. It grows your mailing list and handles global sales smoothly.

Reviews and Ratings

Average Rating: 5 out of 5 stars Total Reviews: 2183+

Pros

• No transaction fees.
• Unlimited on Pro plan.
• 24/7 support.

Cons

• SMS extra cost.
• 30 notifications in the free plan

5 – Preorder, Back in stock Duck

The Preorder, Back in stock Duck app offers pre-orders and item availability notifications for your Shopify account. It adds buttons for pre-orders for out-of-stock items, which automatically notify customers via email or WhatsApp when the item(s) are back in stock. You can also choose item availability settings to help you manage what is back in stock; it even integrates with WhatsApp notifications and Klaviyo. 

The setup is straightforward and enables you to sell in advance of inventory, gain valuable metrics against demand, and allows customers to obtain items when they are back in stock quickly and efficiently.

How It Works

Pre-orders available when items are out of stock, notify when available, auto restock alerts at variant level, WhatsApp integration, and Klaviyo available.

Features

• Pre-orders for out-of-stock items.
• Notify buttons.
• Auto alerts via email/WhatsApp.
• Variant-level controls.

Benefits

Recovers lost sales, generates demand data, and engages customers via preferred channels. Easy for beginners with human support.

Reviews and Ratings

Average Rating: 5 out of 5 stars Total Reviews: 325+

Pros

• WhatsApp integration.
• No fees on pre-orders within limits.
• 24/7 live chat.

Cons

• Branding on a free plan.
• 30 notifications in the free plan

Comparison of Top Shopify Back-in-Stock Apps

Here’s a table comparing the top 5 Shopify back-in-stock apps. It covers key points like rating, pricing, and standout features.

App Name	Rating (Reviews)	Free Plan?	Key Features	Pricing Starts At	Best For
SB Coming Soon Product‑PreSale	4.8 (150)	Yes	Unlimited notifications	$5.99/month	All sizes of businesses
Notify! Back in Stock, Pre-Order	4.9 (2,545)	Yes	Wishlists, partial payments	$9.90/month	Wish list features
Back In Stock, Notify Me: Kbite	5.0 (2,863)	Yes	Price drop alerts, analytics	$5/month	Analytics focus
Preorder, Back In Stock ‑ STOQ	5.0 (2,183)	Yes	Deposits, multi-location	$10/month	Global sales
Preorder, Back in stock Duck	5.0 (325)	Yes	WhatsApp alerts, variant control	$10/month	Quick setup

Key Takeaways

• Stockouts cost trillions; back-in-stock apps recover up to 40% of lost sales.
• Benefits include better customer experience and inventory insights.
• Top apps average 4.9+ ratings, with features like SMS and customizations.
• Start with free trials to test back-in-stock notifications.
• In 2025, these tools are must-haves for Shopify growth.

Conclusion

To summarize, as e-commerce takes center stage in 2025, reaching $4.3 trillion in sales, having a plan for out-of-stock items is critical to not losing billions of dollars in potential revenue. A reliable Shopify back-in-stock app, like our top five, SB Coming Soon – Back In Stock, Notify!, Kbite, STOQ, and Duck, allows stores to send back-in-stock alerts and notifications to customers to recover up to 40% of missed sales and increase brand loyalty. 

All the apps we reviewed have easy-to-set-up features, customizable options, and email/SMS integration to help gather potential customer demand and build email lists. The back-in-stock apps ranked high (4.9 stars out of 5 on average) and provided useful secondary applications like pre-orders, customer analytics, and mapping stockouts to sales opportunities. Each app turned a stockout into a new opportunity.

You can begin today with a free trial and implement back-in-stock notifications, and watch your Shopify store grow and succeed more than ever as competition increases.

FAQs

What is a back-in-stock app for Shopify?

A back-in-stock app lets customers opt in to alerts for an item that is out of stock, and then sends automatic alerts to the customer via email or SMS when the item has been restocked. This can also help recover lost sales and build customer engagement with your online store.

Why do Shopify stores need a back-in-stock app?

Retailers lose trillions of dollars of revenue annually due to stockouts. Stockout alerts inform customers when items they want to buy are available for sale, recovering up to 40% of sales missed when items were out of stock, building loyalty with customers, and giving you better insights into demand for inventory management decisions.

What criteria should I use to choose a back-in-stock app?

Think about how easy it is to set up, customize it, integrate it with your email or SMS tool, pricing, customer support, analytics, and multi-languages. Get a free trial and test to see if it fits the needs of your store and helps effectively notify your customers.

What are the benefits of back-in-stock alerts?

They recover sales, enhance customer experience, build email lists, create a sense of urgency, and show you insights into less inventory. Alerts transform out-of-stock frustrations into business opportunities, leading to increased repeat visits and loyalty for your store in a highly competitive e-commerce environment.

Which are the top Shopify back-in-stock apps in 2025?

The top five recommended alert apps are SB Coming Soon-Back In Stock, Notify! Back in Stock, Kbite, STOQ, Duck. The features include pre-orders, customized alerts with notes and phrases, building an email list, and analytics. These apps are expected to be rated very high, with an average of 4.9 stars in reliability and effectiveness.