Out-of-stock products are a serious problem for many businesses. Because it’s a dead-end of the customer’s journey, where you lose sales to your competitors.
Imagine a customer landed on your website to find out that the product is not available. To avoid such situations, Shopify Apps for Low Stock Alerts help by notifying you before inventory runs low, so you can stay in stock and keep sales on track.
You can make this experience better by offering a “Notify me when back in stock” option to the customers. This is helpful especially when you’re offering exclusive products or offers. Shopify back-in-stock alert apps help you offer restock notification functionality to your customers and activate a new revenue channel for your business.
In this post, we review the five best Shopify restock apps that you can try in 2025. We’ll also take a closer look at each app’s functionality from the end-user’s point of view.
Five Best Back-in-Stock Apps Shopify – Quick List
There are tens of Shopify apps available with restock alert functionality.
Now, let’s go through each app in detail and see what they have to offer.
1. Stoq: Back In Stock, PreOrder
Stoq is the best Shopify app for earning revenue from out-of-stock products. You can use the ‘Notify me when available’ or ‘Preorder’ widget and tap into customer demand. It allows you to send email/SMS back-in-stock alerts with purchase links automatically on restocks. You can also offer preorder, backorder, presales with partial payments, discounts and more.
It has a Built for Shopify badge. Meaning it’s fast, customizable, well-integrated and fully featured.
Back-in-Stock Alert Functionality on Frontend:
Feature Highlights:
- Add a ‘Notify me’ or Preorder widget to your out-of-stock products in minutes
- Customize Notify Me button, and restock alerts to match your brand, with 24*7 help
- Multi-language back-in-stock alerts, multi-location, reminders, grow your mailing list, insights on trending products
- Set up preorders, presales, and back orders with partial payments & discounts
- Plans designed for every stage of growth. New updates every month! No transaction fee for preorders
Pricing Plans:
- Start: Free forever
- Lite: $10/month
- Standard: $29/month
- Pro: $69/month
With a 5-star rating, 24*7 help, 1:1 onboarding calls and new updates every month, you can start for free today and watch orders come through in just a few minutes.
2. Swym Back in Stock Alerts
Swym is one the best Shopify Restock apps that helps you keep the interested customers in the loop via email or SMS. The best part is that you can customize the button text and colours to match your store’s branding. You can also schedule to notify customers in batches when the products are restocked.
One unique feature is that you can use the list of subscribed customers to retarget them via Facebook or Instagram ads.
Back-in-Stock Alert Functionality on Frontend:
Feature Highlights:
- Easy to set up and integrate with any theme, any language
- Fully customizable back-in-stock feature to match your Shopify theme
- Auto-notify the customers via SMS or Emails on product restocks
- Retarget the interested customers via Instagram or Facebook Ads
- Detailed analytics of product restock subscriptions
- Integration with popular platforms like Klaviyo, Mailchimp, and Omnisend
Pricing Plans:
- Free
- Starter: $19.99/month
- Pro: $59.99/month
- Premium: $99.99/month
Overall, the app is worth trying with a free plan and all the features you need.
3. Channelwill Back in Stock
Channelwill Back in Stock app allows you to add a fully customizable ‘Notify when back in stock’ button in multiple languages. It allows users to opt for restock alerts for products and get automated notifications via SMS or email.
You can integrate the Channelwill app with other platforms like Klaviyo and Mailchimp for seamless communication.
Back-in-Stock Alert Functionality on Frontend:
Feature Highlights:
- Customize the Shopify restock email templates using blocks
- Supports multiple languages; good for multi-lingual sites
- Fully customizable buttons and popups on the product page
- Get 24×7 customer support from Channelwill to solve any queries
Pricing Plans:
- Free (50 Emails/month)
- Pro: $5.90/month (500 Emails/ month)
- Unlimited: $9.99/month
The free plan has limitations on the number of emails you can collect using the ‘Notify when back in stock’ pop-up.
4. KB Back In Stock Restock Alert
This app is more than just a Shopify Restock alert app; it offers a complete toolset to recover lost sales through back-in-stock notifications, abandoned cart mails, and price drop alerts. It perfectly blends the back-in-stock buttons and popups with the existing theme through the customization options.
Back-in-Stock Alert Functionality on Frontend:
Feature Highlights:
- Fully customizable back-in-stock alert buttons and popups
- Supports both email and SMS notifications for product restocks
- Send automatic notifications and customize them using store variables
- Use additional tools like price abandoned cart notifications and drop alerts
Pricing Plans:
- Free
- Basic: $5/month
- Starter: $9/month
- Pro: $19/month
The free plan offers unlimited subscribers. However, the number of emails that you can send is limited to 30 per month.
5. Appikon ‑ Back In Stock
Using the Appikon Back in Stock app for Shopify, you also get an option to send push notifications in addition to Email and SMS. This could be a good option for customers who are reluctant to share their email or phone number for the restock alerts.
The back-in-stock feature is fully customizable and can be modified as per your store’s theme. You also get an option to track the performance of alerts in real time through a dedicated analytics dashboard.
Back-in-Stock Alert Functionality on Frontend:
Feature Highlights:
- Measure customer demands through back-in-stock subscriptions
- Send automated notifications to customers for product restocks in Shopify
- Analyze product restock subscription waitlists and prioritize restocking
- Collect newsletter subscribers along with email restock alert opt-ins
Pricing Plans:
- Free
- Starter: $19/month
- Pro: $29/month
- Premium: $49/month
Bonus Tips to Optimize Shopify Back-in-stock Notifications
Using the Shopify app, you can add restock alerts functionality to your store and save lost sales. Here are some expert tips to make the most out of them:
- Customize the Shopify restock alerts using variables for personalized notifications
- Offer exclusive discount codes to customers who opt-in for restock alerts
- Use back-in-stock alerts to promote your upcoming products before their launch
- Create a FOMO for back-in-stock products to get more conversions through alerts
- Share related products to customers via newsletters if you’re not going to restock the product
In summary, the restock alerts are good if you sell products that often stock out. What’s better is to offer personalized customer support through convenient channels (emails are too old!) For example, you can integrate WhatsApp Chat into your store and help customers directly reach out to you.
