“Such a great app! Meera was a huge help from start to finish. She responded super quickly and was really friendly throughout the whole conversation, which made the process easy and stress-free. We needed a few adjustments made, and she walked us through everything clearly and got it all sorted without any hassle. The support was genuinely top notch — responsive, patient, and focused on actually solving our problem rather than giving canned answers. It's reassuring to know that help is there and handled so well when you need it. Easy to recommend for anyone who values fast, reliable, and friendly support.”
Shopify Back in Stock App With Automatic Restock Alerts
Back In Stock! Alert Engine is a Shopify back in stock app that adds a Notify me button to sold-out products, builds an out-of-stock waitlist and emails shoppers automatically when stock returns.
Features
Everything you need to turn sold-out pages into sales
From the Notify me button to the email that brings a shopper back.
Notify me button
Appears on sold-out products automatically and can be styled to match your brand. Premium adds it to collection pages.
Automatic restock alerts
Subscribers get an email the moment stock returns. You can also send alerts manually or in batches.
Low-stock and price-drop alerts
Create urgency and win back price-sensitive shoppers. Low-stock alerts from Advanced, price-drop alerts on Premium.
Out-of-stock waitlists
See which products shoppers are waiting for, so you can reorder the right stock.
Email logs
Open, delivery and read logs on every plan show how your alerts perform.
Klaviyo & Omnisend
Sync subscribers to Klaviyo or Omnisend on Premium, so every signup grows your email list.
Import & export subscribers
Move subscriber lists in or out on any plan, and swap a subscriber's product when you need to.
Emails from your domain
Send alerts from your store's own email domain on Premium.
Multi-language & multi-location
Alerts in more than one language, with multi-location inventory, on Premium.
Notify me popup
A signup form that fits your store
Pick where the Notify me button sits, then set the colors, labels and popup text to match your brand.
Alert emails
Emails that send themselves
Switch on back-in-stock and confirmation emails, edit the templates and set the sender name and reply-to address.
Get started
Live on your store in three steps
Set up from the app admin. Our team helps if your theme needs a custom touch.
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01
Install the app
Install Back In Stock! Alert Engine from the Shopify App Store and start on the free plan.
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02
Style the Notify me button
Choose where the button appears and match its colors and text to your brand.
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03
Switch on your alerts
Turn on restock emails, then add low-stock and price-drop alerts on the plans that include them.
Pricing
Start free. Upgrade when you grow.
Billed in USD by Shopify. Paid plans include a 7-day free trial.
50 email alerts
- Unlimited subscribers
- Restock alerts
- Custom Notify me button
- Custom alert templates
- Import / export subscribers
- Email open, delivery & read logs
7-day free trial
- Unlimited email alerts
- Unlimited subscribers
- Restock alerts
- Custom Notify me button
- Import / export subscribers
- Email open, delivery & read logs
- Insights
7-day free trial
- Unlimited email alerts
- Unlimited subscribers
- Low-stock & restock alerts
- Custom Notify me button
- Import / export subscribers
- Email open, delivery & read logs
- Insights
7-day free trial
- Everything in Basic
- Unlimited subscribers & email alerts
- Price-drop, restock & low-stock alerts
- Notify me on product & collection pages
- Klaviyo & Omnisend integrations
- Email from your domain
- Multi-language
- Multi-location inventory
Plans and prices as listed on the Shopify App Store, 22 Sep 2026.
Shopify App Store
What merchants say about Back In Stock! Alert Engine
Recent reviews from the App Store listing.
“This app has been huge to help my customers get notified instantly when we restock high demand products and has definitely increased my sales.”
“Excellent app and customer support. They even fixed an issue caused by another app dev team. Amazing.”
“The app is easy to setup and the support team is very responsive and helpful.”
How We Built Back In Stock! Alert Engine
From sold-out pages that lose sales to automatic restock alerts, waitlists and Klaviyo and Omnisend sync.
Read the case study
Help docs
Setup guides, customization tips and answers to common questions.
Open help docsEmail support
Our team helps with installation and styling for your theme.
support@scriptengine.netNeed something custom?
We build custom restock alert features and integrations for your store.
Book a free strategy callFAQ
Back In Stock! Alert Engine questions
Is there a free plan?
Yes. The free plan includes 50 email alerts, unlimited subscribers, restock alerts, a custom Notify me button, custom alert templates and email logs.
Which alerts can I send?
Restock alerts on every plan. Advanced adds low-stock alerts, and Premium adds price-drop alerts.
Does it work with Klaviyo or Omnisend?
Yes, on the Premium plan. Subscribers sync to Klaviyo or Omnisend, so every alert signup also grows your email list.
Can I send alerts manually?
Yes. Alerts go out automatically when stock returns, and you can also send them manually or in batches.
Will it work with my theme?
The Notify me button can be styled to match your brand. If your theme needs a custom touch, our support team can help.
Tell us what you're building.
A 30-minute call with a Shopify developer, not a salesperson. You'll leave with a clear plan, whether or not you work with us.