Inventory shortages are inevitable in eCommerce, but losing customers because a product is temporarily unavailable shouldn’t be. That’s where Shopify back-in-stock apps come into play. These tools automatically notify customers the moment an out-of-stock item becomes available again, helping merchants recover lost sales, improve customer experience, and keep revenue flowing.
With so many apps on the Shopify App Store, choosing the right one is crucial. In this guide, we review the 10 Best Shopify Back in Stock Apps, featuring powerful tools that help merchants re-engage customers and prevent missed sales opportunities.
Best Shopify Back in Stock Apps to Boost Sales and Improve Customer Experience
✅ 1. NotifyEZ – Messaging & Alerts (Best Overall Back in Stock App for Shopify)
NotifyEZ is the best overall Back-in-Stock app for Shopify, offering multi-channel notifications through email, SMS, and other custom channels using your own SMTP or SMS gateway. This gives merchants full control over branding, delivery quality, and messaging costs.
Key Highlights
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Send back-in-stock alerts via email or SMS using your own gateways.
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No-code automation triggers when products or variants are restocked.
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Fully customizable email/SMS templates.
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Send notifications to customers and internal staff.
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Detailed delivery logs with the ability to resend failed messages.
⭐ 2. Back in Stock: Restock Alerts
This is one of the most commonly used back-in-stock apps on Shopify. It focuses on simplicity and speed, making it ideal for smaller stores.
Key Features
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Easy setup with automatic installation
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Email and SMS restock alerts
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Customizable popup widget
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Basic analytics
Best For: Stores that want a simple and straightforward solution.
⭐ 3. Restock Alerts by Webkul
Webkul offers a powerful restock alert system with advanced customization options.
Key Features
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Customer subscription management
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Variant-level tracking
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Beautiful customizable buttons
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Multi-language support
Best For: Merchants needing strong customization and multi-language capabilities.
⭐ 4. Back in Stock – Out of Stock Alerts
A solid app focusing mainly on email alerts and simple automation workflows.
Key Features
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Back-in-stock email automation
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Low stock alerts
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Customizable signup forms
Best For: Small and mid-size stores that need a budget-friendly option.
⭐ 5. Back in Stock: Sold Out Notifications
A feature-rich app designed to make subscription and engagement easy.
Key Features
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Email & SMS restock notifications
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Customizable widgets
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Customer tracking dashboard
Best For: Stores that want a mix of simplicity and solid functionality.
⭐ 6. Notify Me! Back in Stock Alerts
Popular among Shopify merchants for style and ease of use.
Key Features
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Clean and modern alert signup widget
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Email notifications
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Integrates with Shopify themes
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Basic analytics
Best For: Fashion, beauty, and lifestyle brands.
⭐ 7. Now Back in Stock
This app focuses on fast performance and reliable alert delivery.
Key Features
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Automatic email triggers
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Variant-based alert signup
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Simple interface
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Easy integration
Best For: Stores wanting a reliable “plug and play” experience.
⭐ 8. Back in Stock + Out of Stock Alerts
A well-rounded tool with strong support and configurable templates.
Key Features
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Custom email templates
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Variant-level tracking
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Popup subscription form
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Low-stock warnings
Best For: Merchants who want both customer and admin alerts.
⭐ 9. Stockify – Back in Stock Alerts
Known for its clean UI and fast setup.
Key Features
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Email notifications
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Dashboard insights
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Customizable alert box
Best For: Small merchants or beginners.
⭐ 10. Restock Rocket
A more modern back-in-stock tool featuring stylish widgets and well-designed UX.
Key Features
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On-brand alert widgets
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Email/SMS notifications
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Customer insights
Best For: Brands that prioritize design and user experience.
While all apps on this list offer strong back-in-stock capabilities, NotifyEZ stands out for one crucial reason:
👉 It lets you fully control your notification infrastructure.
With multi-channel support (email, SMS, and more), automation, customizable templates, internal staff alerts, and the ability to use your own gateways, NotifyEZ is ideal for merchants who want a scalable, high-performance, and cost-efficient back-in-stock solution.
If your store is growing and you want a powerful, flexible notification system, NotifyEZ – Messaging & Alerts is the clear #1 choice.