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Shopify apps
Email marketing
Back In Stock! Alert Engine
Back In Stock! Alert Engine
by Script Engine
4.9
(22 reviews)
Best suited for stores using Klaviyo, Omnisend, or Notify me to re-engage customers when out-of-stock items return.
Notify customers by restock alert when items are back in stock & create an out-of-stock waitlist. Back in Stock! Alert Engine is an all-in-one marketing tool to help you recover lost sales. Don't miss out on lost sales with Back In Stock & Restock Alerts, Abandoned carts, price drop, and low stock notifications through Emails. Shows the Notify Me!! button on out of stock products and automatically sends notifications when they get in stock. Creates the out-of-stock & price drop waitlists to see products in demand. Fully customize all notifications, grow your mailing list, and much more !! Back in Stock! Alert Engine is an all-in-one marketing tool to help you recover lost sales. Don't miss out on lost sales with Back In Stock & Restock Alerts, Abandoned carts, price drop, and low stock notifications through Emails. Shows the Notify Me!! button on out of stock products and automatically sends notifications when they get in stock. Creates the out-of-stock & price drop waitlists to see products in demand. Fully customize all notifications, grow your mailing list, and much more !! more Restock Alerts: Send automatic and manual back in stock notifications via Email. Setup Notify Me Buttons in Minutes; Customize Buttons to Match Brand Guidelines. Grow Email Lists & Sync to Email Providers Like Klaviyo. Restock alert, Low stock alert, price drop alert, multilingual tools, and more! Compatible with Almost Every Theme, & Support is Available to Assist 24/7!
Copy from the Shopify App Store listing, unedited.Email marketing
Top line
conversion rate and average order value
Free
64/100
Solid · from 22 reviews
What it does
Restock Alerts: Send automatic and manual back in stock notifications via Email.
Setup Notify Me Buttons in Minutes; Customize Buttons to Match Brand Guidelines.
Grow Email Lists & Sync to Email Providers Like Klaviyo.
Restock alert, Low stock alert, price drop alert, multilingual tools, and more!
Compatible with Almost Every Theme, & Support is Available to Assist 24/7!
There is no plan to choose
The listing shows this as free, with no paid tiers published — so there is no volume question to answer and nothing to size yourself against. Check the listing for in-app charges before you rely on that.
64
/ 100Solid
Scored on 22 merchant reviews we hold for Back In Stock! Alert Engine, across five checks. Every figure is computed from those reviews — expand any row to see the counts behind it.
Review history
2025–2026 · 22 reviews read| 2025 | 14 reviews |
|---|---|
| 2026 | 8 reviews |
What merchants say
4.9
68%
of reviews get an answer0%
had used it a year when they wroteRecent merchant reviews
The newest 8 of 22. Open one to read it in full, with the developer's reply where there is one.
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.
Great app and great support, thank you !
App looks good, has a feature to Remind customer of the restock . Helpful
This is the second app from Script Engine that we are using on our site, we have used the Wish List app for a couple of years and that is how we learned they had released a Back in Stock app. After reviewing it and getting in touch with the developers, they soon confirmed that they would soon be implementing an integration with Omnisend, the email marketing software we use, and based on this and the good experience with the Wish List app, we decided to migrate from our existing back in stock app to this one. The team have been very proactive and building our suggestions into the app and any that haven't been immediately possible they are reviewing and planning for the future, which is great. Being based in the UK and therefore on a different time zone can cause some difficulties in emergency situations but everything has always got resolved. We are now very happy being able to design exactly the emails we want and very accurately monitor opens, clicks and purchases. Plus the design of the app and admin is nice, easy to set up as well. Thanks to the Script Engine team for being very patient with us and getting us up and running!
Tolle, einfach zu bedienende App. Funktioniert reibungslos. Ich hatte ein Problem mit dem hinzufügen von Produkten auf die "nicht benachrichtigen Liste". Der Support hat schnell geholfen und das Problem beseitigt. Danke und ich kann die APP nur empfehlen.
Very straight forward to use, the integration is simple and has what you need. Customer service is fast and responsive. Great app, great customer service.
great app! I contacted them to help me out with customizing the app for a specific product and they answered very quickly and fixed it!
Back In Stock! Alert Engine FAQ
Answered from this app's own listing and its full review record.
Best suited for stores using Klaviyo, Omnisend, or Notify me to re-engage customers when out-of-stock items return.
The Shopify App Store lists this app as “Free”. It does not publish plain monthly prices we can compute against.
On our scorecard Back In Stock! Alert Engine rates 64 out of 100 — solid — read from 22 merchant reviews. The developer has published replies to 15 of 22 reviews. The score reflects what the review record shows, nothing more.
22 merchants have reviewed Back In Stock! Alert Engine, averaging 4.9 out of 5. We hold the review history from 2025 to 2026, which is what the year-by-year chart on this page is built from.
At a glance
4.9 / 5 · 22 reviews
4.73 from 15 reviews
15 (was 7)
15 of 22 reviews
6 days
Free
December 23, 2024
2025 – 2026
Categories
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