11 Best Shopify Back in Stock Apps for Online Stores (2025)

11 Best Shopify Back in Stock Apps for Online Stores (2025)

Previously, we discussed the importance of back-in-stock alerts for Shopify stores and how they help you recover lost sales, keep customers engaged, and maximise revenue. But here’s the thing, alerts are only effective when sent on time. If customers don’t hear from you the moment a product is restocked, they might not return.

That’s why choosing the right back-in-stock app for Shopify is essential.

In this post, we’ve handpicked the 11 best Shopify stock alert apps to ensure your notifications reach customers at the right time.

Best Shopify Back in Stock Alerts Apps

Here are some of the best Shopify back in stock apps that we are seeing stores use:

1. STOQ

STOQ is the best back-in-stock and preorder app for Shopify in this list, helping merchants maximise sales by selling preorders before restocks and sending automatic stock alerts. It allows customers to join a waitlist for out-of-stock items and receive instant notifications when products are available again. With multi-language support, customisation, and 24/7 assistance, Stoq ensures a smooth experience for store owners and shoppers.

Key Features:

  • Add a Preorder or Notify Me button to out-of-stock products.
  • Customise alerts, buttons, and messaging to match your brand.
  • Send multi-language email/SMS alerts to waitlisted customers.
  • Allows preorders, backorders, and partial payments for presales.
  • Manage inventory across multiple locations with advanced analytics.

Stoq offers a free plan, with paid options starting at $10/month.

2. Notify Me!

Notify Me is a shopify app that helps Shopify merchants to reconnect with customers when products are restocked. The app allows store owners to add a “Notify Me” or “PreOrder” button, along with low-stock FOMO widgets, to out-of-stock product, home, and collection pages to create urgency and drive conversions. It supports B2B and B2C orders, helping merchants to offer discounts, notes, and partial preorder payments.

Key Features:

  • Collects customer contact info even when items are unavailable.\
  • Automated back-in-stock alerts via email, SMS, and push.
  • Preorder and backorder support with partial payment options.
  • Low-stock FOMO widgets to create urgency.
  • Seamless integration with B2B and D2C workflows.
  • Detailed sales reports for tracking lost revenue.

Notify Me offers a free plan, with paid options starting at $19.90/month.

3. Timesact

Timesact is a renowned back-in-stock Shopify app designed to re-engage customers with timely restock notifications. It stands out for its guided onboarding, making setup seamless for merchants. The app also offers complete inventory control, allowing store owners to turn preorders and restocks on or off based on stock levels. With automated alerts and preorder features, Timesact helps businesses maximise sales before replenishing inventory.

Key Features:

  • Automates back-in-stock email alerts to waiting customers.
  • Allows shoppers to sign up for restock notifications with a single click.
  • Provides customisable signup forms and email templates.
  • Preorder functionality to capture early sales.
  • Inventory control to manage stock availability.
  • Helps track demand for out-of-stock items to improve inventory planning.

Timesact offers a free plan, with paid options starting at $6.65/month.

4. PreOrder Globo

PreOrder Globo is a back-in-stock app that informs customers when sold-out products are restocked. Beyond just offering a “Notify Me” button, it enables preorders, presales, and backorders, allowing Shopify store owners to collect partial payments in advance. Merchants can also add custom delivery notes like “Delivery in 21-30 days” below the preorder button, helping manage customer expectations while securing sales before restocking.

Key Features:

  • Sends automatic back-in-stock notifications via email.
  • Preorder, presale, and backorder functionality with partial payments.
  • Custom delivery notes for better order management.
  • “Notify Me” button for easy customer signups.
  • Seamless integration with Shopify themes and marketing tools.

PreOrder Globo offers a free plan, with paid options starting at $9.90/month.

5. Appikon

Appikon is a well-known back-in-stock app that helps Shopify store owners turn sold-out products into future sales. Its waitlist functionality allows shoppers to subscribe for alerts, and once stock is replenished, instant notifications are sent via email, SMS, or push. The app also provides detailed reporting tools, offering insights into customer demand for both new and existing products, helping merchants optimize inventory and increase sales.

Key Features:

  • Automated back-in-stock alerts via multiple channels.
  • Waitlist functionality to capture lost sales.
  • Customisable signup forms and emails to match branding.
  • Advanced analytics for demand forecasting.
  • Integrations with Klaviyo, Mailchimp, and Facebook Messenger.

Appikon offers a free plan, with paid options starting at $19.99/month.

6. AMP

AMP is a powerful back-in-stock solution for Shopify merchants looking to capture lost sales and re-engage customers. Unlike other apps, it replaces frustrating “out of stock” messages with customisable restock notification buttons, ensuring shoppers can easily subscribe for alerts. Designed to handle high SKU volumes, AMP offers detailed analytics, helping merchants track demand and optimise inventory planning.

Key Features:

  • Instant back-in-stock notifications via email, SMS, and push.
  • Customisable signup forms and restock buttons to match store branding.
  • Tracks customer demand trends for inventory planning.
  • Works with high SKU stores and supports multi-device compatibility.
  • Supports multi-language alerts for global reach.
  • Integrates with Klaviyo, Mailchimp, and Shopify Flow.

AMP is free to install, with paid plans starting at $19/month.

7. PushOwl

PushOwl, powered by Brevo, is a multi-channel marketing suite that includes back-in-stock notifications alongside email, SMS, and web push alerts. The app allows customers to subscribe for restock notifications through push notifications, ensuring they receive instant updates without relying solely on email. With automation tools, segmentation, and smart pop-ups, it helps merchants recover lost sales and drive customer retention.

Key Features:

  • Web push notifications for instant back-in-stock alerts.
  • Automated email & SMS reminders for restocked items.
  • Customisable signup pop-ups to capture lost sales.
  • Advanced segmentation for personalized notifications.
  • Integrates with Shopify Flow, Klaviyo, and Brevo for streamlined automation.

PushOwl offers a free plan, with paid options starting at $19/month.

8. Alert Me

Alert Me is a straightforward and efficient back-in-stock app that helps Shopify merchants automate restock notifications without manual effort. Customers can subscribe to unlimited alerts using simple sign-up forms on product and collection pages. When an item is restocked, the app instantly triggers email and SMS notifications, bringing shoppers back effortlessly. Its Customisable themes and built-in analytics help stores track demand and maximise sales.

Key Features:

  • Automatic back-in-stock alerts via email.
  • Unlimited customer sign-ups for restock notifications.
  • Real-time notifications to increase conversions.
  • Customisable email themes to match your store’s branding.
  • Analytics dashboard to track product demand.

Alert Me offers a free plan, with paid options starting at $4.99/month.

9. Swym Back

Swym is the perfect back-in-stock app for D2C brands willing to invest in advanced features and integrations. It not only notifies customers when products are restocked via email and SMS but also re-engages them through social media. With its AI-powered recommendations, Swym helps drive customer interest even before items are available again.

Key Features:

  • Automated restock notifications via email and SMS.
  • Preorder and coming soon alerts to capture early demand.
  • AI-driven product recommendations for out-of-stock items.
  • Send alerts in a batch to control customer outreach.
  • Integration with Klaviyo, Omnisend, and Mailchimp.

Swym offers a free plan, with paid options starting at $19.99/month.

10. ES Back in Stock Notify Me

ES Back in Stock Notify Me helps Shopify merchants win back lost sales with automated restock alerts via email and SMS. With a one-click setup, it automatically enables an “Email Me” button on product pages, allowing customers to subscribe for notifications when an item is available again. The app also offers customisable email templates to match your store’s branding and multi-language support to engage a global audience.

Key Features:

  • Instant back-in-stock notifications via email and SMS.
  • One-click setup with no coding required.
  • Customisable email templates for branded alerts.
  • Multi-language support for international reach.
  • Integrates with Mailchimp and Klaviyo for seamless automation.

ES Back in Stock offers a free plan, with paid options starting at $5.99/month.

11. SC Back in Stock Restock Alert

SC is an effective back-in-stock Shopify app that helps Shopify merchants convert stockouts into sales opportunities. It offers batch notifications, allowing merchants to control how many customers are notified immediately, preventing inventory from selling out too quickly. Its multi-language support and deep integrations provide an improved experience for store owners and shoppers.

Key Features:

  • Instant back-in-stock alerts via email, SMS, and push notifications.
  • Customisable signup forms and notification designs for branding.
  • Batch notifications to manage large restocks efficiently.
  • Multi-language support to engage a wider audience.
  • Integrates with Mailchimp, Klaviyo, and PushOwl for automation.

SC Back in Stock offers a free plan, with paid options starting at $10/month.

Conclusion

Not all back-in-stock apps in this list are created equal. While many offer basic restock alerts, only a few truly help merchants maximise sales. Some lack customisation, others fall short on automation, and many fail to integrate seamlessly with Shopify’s essential tools. That’s where STOQ stands out. As a top-rated solution, it goes beyond simple notifications, allowing you to easily capture preorders, collect partial payments, and efficiently manage restocks.

Install STOQ now and turn stockouts into sales!