Running out of stock can mean losing potential sales, but with the right back-in-stock alert app, you can recover those lost opportunities. These apps notify customers when products are restocked, helping boost conversions and customer satisfaction.
In this guide, we’ll compare the top 8 Shopify back-in-stock alert apps, covering their features, pricing, pros & cons, and FAQs to help you choose the best one for your store.
Why Use a Back in Stock Alert App?
- Recover lost sales by capturing customer interest.
- Reduce cart abandonment by letting shoppers know when items return.
- Improve customer experience with automated notifications.
- Increase email/SMS subscribers for future marketing.
Comparison Table: Best Back in Stock Alert Apps
| App Name | Key Features | Pricing (Starting) | Best For |
| Back in Stock: Customer Alerts | Email/SMS alerts, Klaviyo/Mailchimp integration | Free (50 alerts), $9.99+/mo | Small to medium stores |
| Stocky Alerts | Shopify Flow integration, waitlist management | Free (50 alerts), $9.99+/mo | High-volume stores |
| Out of Stock Alerts | Simple UI, real-time sync | Free (50 alerts), $9.99+/mo | Easy setup |
| PreOrder Now | Pre-orders + back-in-stock alerts | Free plan, $9.99+/mo | Dropshipping/pre-orders |
| Growave Back in Stock | Loyalty program integration | Free plan, $9.99+/mo | Stores using Growave |
| Stock Notifier | A/B testing, segmentation | Free trial, $14.99+/mo | Large stores |
| Back in Stock – Restock Alerts | Shopify Flow support | Free plan, $12.99+/mo | Balanced features |
| ReStock Alerts | Discount incentives, urgency tools | $9.99+/mo | Flash sales & promotions |
Detailed Best Back in Stock Alert Shopify Apps Reviews
1. Back in Stock: Customer Alerts
✅ Best for: Small to medium stores
💰 Pricing: Free (50 alerts), $9.99+/mo
Overview
A popular and easy-to-use app that helps stores recover lost sales with automated restock alerts.
Key Features
✔ Email & SMS notifications
✔ Customizable alert buttons
✔ Integrates with Klaviyo & Mailchimp
✔ Multi-language support
Pros & Cons
| ✅ Pros | ❌ Cons |
| Simple setup | SMS requires paid plan |
| Affordable pricing | Limited free tier |
| Good deliverability |
Why Use It?
Great for stores needing a budget-friendly and user-friendly solution.
2. Stocky Alerts ‑ Back in Stock
✅ Best for: High-volume stores
💰 Pricing: Free (50 alerts), $4.99+/mo
Overview
A powerful app with Shopify Flow integration, making it ideal for stores with complex automation needs.
Key Features
✔ Automated email/SMS alerts
✔ Waitlist management
✔ Customizable pop-ups
Pros & Cons
| ✅ Pros | ❌ Cons |
| No coding needed | Limited free plan |
| Works with Shopify Flow |
Why Use It?
Best for stores that need advanced automation and inventory sync.
3. Out of Stock Alerts
✅ Best for: Simple & effective alerts
💰 Pricing: Free (50 alerts), $9.99+/mo
Overview
A straightforward app that focuses on core functionality without unnecessary extras.
Key Features
✔ Email & SMS alerts
✔ Real-time inventory sync
✔ Clean UI
Pros & Cons
| ✅ Pros | ❌ Cons |
| Easy to use | SMS costs extra |
| Good support |
Why Use It?
Perfect for stores that want a no-frills back-in-stock solution.
4. PreOrder Now ‑ Back in Stock
✅ Best for: Stores needing pre-order functionality
💰 Pricing: Free plan available, paid plans from $9.99/month
Overview
A unique app that combines back-in-stock alerts with pre-order capabilities, perfect for stores with high-demand products.
Key Features
✔ Waitlist and pre-order system
✔ Partial payment options
✔ Email/SMS notifications
✔ Inventory management
Pros & Cons
| ✅ Pros | ❌ Cons |
| Dual functionality (pre-orders + alerts) | Setup can be complex |
| Great for limited edition items | Limited design customization |
| Reduces lost sales from out-of-stock |
Why Use It?
Ideal for stores that frequently deal with product launches or limited inventory situations.
5. Stock Notifier ‑ Back in Stock
✅ Best for: Large stores needing segmentation
💰 Pricing: Free trial, plans from $14.99/month
Overview
An advanced app offering powerful segmentation and A/B testing for optimized conversions.
Key Features
✔ Email & SMS alerts
✔ Customer segmentation
✔ A/B testing for notifications
✔ Detailed analytics
Pros & Cons
| ✅ Pros | ❌ Cons |
| Highly customizable | Steeper learning curve |
| Excellent for large inventories | More expensive than competitors |
| Great reporting features |
Why Use It?
Perfect for established stores that need sophisticated customer targeting.
6. Back in Stock ‑ Restock Alerts
✅ Best for: Balanced functionality
💰 Pricing: Free plan available, premium from $10/month
Overview
A reliable middle-ground option with good automation and Shopify Flow support.
Key Features
✔ Email & SMS alerts
✔ Custom branding
✔ Shopify Flow integration
✔ Real-time syncing
Pros & Cons
| ✅ Pros | ❌ Cons |
| Easy to implement | SMS requires higher plan |
| Good deliverability rates | Limited advanced features |
| Clean interface |
Why Use It?
Great for stores wanting a straightforward solution with some automation capabilities.
7. Notify! Back in Stock|PreOrder
✅ Best for: Creating urgency
💰 Pricing: From $19.90/month
Overview
Focuses on converting alerts into sales through urgency-building features.
Key Features
✔ Email/SMS notifications
✔ Smart waitlists
✔ Discount incentives
✔ Scarcity timers
Pros & Cons
| ✅ Pros | ❌ Cons |
| Great for flash sales | No free plan |
| Effective urgency tools | Basic analytics |
| Simple setup |
Why Use It?
Ideal for stores running frequent promotions or selling trending products.
FAQs About Back in Stock Alert Apps
1. Do back-in-stock alerts really work?
Yes! They help recover 10-20% of lost sales by keeping customers engaged.
2. Are there free back-in-stock alert apps?
Yes, most apps offer free plans with limited alerts (e.g., 50/month).
3. What’s better – email or SMS alerts?
| Alert Type | Open Rates | Best For |
| 20-30% | Non-urgent restocks | |
| SMS | 90-98% | Flash sales/urgent restocks |
Pro Tip: Use both for maximum conversions!
4. How can I maximize conversions from restock alerts?
- Offer exclusive discounts (ReStock Alerts does this well)
- Use urgency phrases (“Only 5 left!”)
- Send follow-up reminders (Stock Notifier excels here)
5. Do these apps work with Shopify POS?
Most premium apps integrate with POS systems to:
- Track in-store inventory
- Notify local customers
- Sync online/offline stock
Final Thoughts: Choosing the Right Back-in-Stock Alert App for Your Shopify Store
After reviewing the top 8 back-in-stock alert apps, it’s clear that each solution offers unique strengths tailored to different business needs. Whether you’re a small store looking for simplicity or an enterprise needing advanced automation, there’s an app that can help you recover lost sales and keep customers engaged.
Key Takeaways:
- For most stores, Back in Stock: Customer Alerts offers the best balance of affordability and functionality.
- If you need pre-orders, PreOrder Now seamlessly combines waitlists with purchase opportunities.
- For advanced users, Stock Notifier provides powerful segmentation and A/B testing.
- Don’t underestimate SMS alerts – apps like ReStock Alerts prove they can dramatically boost conversion rates.
Next Steps:
- Start with a free plan to test functionality
- Monitor your analytics to see which products need alerts most
- Combine with other tools like email marketing or loyalty programs for maximum impact
Remember: A good back-in-stock strategy doesn’t just recover sales – it builds customer loyalty by showing shoppers you value their interest. Implement one of these solutions today to stop losing sales to out-of-stock products!
