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  1. xpay✦ Commerce

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  5. Back In Stock! Alert Engine

Back In Stock! Alert Engine

by Script Engine

4.9

(23 reviews)

77/100 · SolidFree plan available. Free trial available.
Best suited for stores using Klaviyo Email Marketing, Notify me and Omnisend Email Marketing, which it integrates with and willing to start free and move to $4/mo.

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.
View on ShopifyCompare the plansSee the scorecard
Who it’s for
Email marketing
What it moves
Top line

conversion rate and average order value

What it costs
From $4/mo

free plan available · 4 tiers

How it’s supported
77/100

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!

Plan fit
What each step up actually buys you

This developer's plans are separated by features, not by how big your store is — so there is no volume that picks a tier for you. Here is what each one adds over the one below it.

Free Plan
Free
You start with

50 Email Alerts

Unlimited Subscribers

Restock Alert Only

Custom Notify Me Button

Custom Alert Templates

Import/Export Subscribers

Basic Plan
$4/month
Adds

Unlimited Email Alerts

Insights

Advanced Plan
$8/month
Adds

Low Stock & Restock alert

Premium Plan
$12/month
Adds

Everything in Basic plan

Unlimited Subscribers & Email Alerts

Price drop - Restock - Low stock alerts

Custom button Product & Collection page

Integrations with Klaviyo, Omnisend

Email from your domain

Listed as “Free plan available. Free trial available.”. Plan contents change — confirm on the listing before you install.
Pricing
Free plan available. Free trial available.
Free Plan

Free

Free
50 Email Alerts
Unlimited Subscribers
Restock Alert Only
Custom Notify Me Button
Custom Alert Templates
Import/Export Subscribers
Email open, delivery & read logs
Swap/Replace Subscriber Product
Basic Plan

$4/month

Lowest paid plan
Unlimited Email Alerts
Unlimited Subscribers
Restock Alert Only
Custom Notify Me Button
Import/Export Subscribers
Email open, delivery & read logs
Swap/Replace Subscriber Product
Insights
Advanced Plan

$8/month

Unlimited Email Alerts
Unlimited Subscribers
Low Stock & Restock alert
Custom Notify Me Button
Import/Export Subscribers
Email open, delivery & read logs
Swap/Replace Subscriber Product
Insights
Premium Plan

$12/month

Everything in Basic plan
Unlimited Subscribers & Email Alerts
Price drop - Restock - Low stock alerts
Custom button Product & Collection page
Integrations with Klaviyo, Omnisend
Email from your domain
Multi-language
Multi-locations (inventory)
Plans as listed on the Shopify App Store. Always confirm current pricing before installing.

77

/ 100
Solid
low confidence

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.





Recent reviews rate above this app's own average
Reviews in the last 12 months average 5.00, 0.18 stars above the lifetime average of 4.82.
Computed from the 22 reviews we hold, with 12-month windows measured to 2026-09. This scores the public review record — it is not a review of the software itself, and a low score often means we hold little evidence rather than poor evidence.
Review history
2025–2026 · 22 reviews read
Reviews per year
202514 reviews
20268 reviews
What merchants say

4.9

23 reviews
5★95%
4★0%
3★0%
2★0%
1★5%
Developer replies
68%
of reviews get an answer
Reviewed at 12m+
0%
had used it a year when they wrote
From 22 reviews read. Typical reviewer had used the app for 6 days. Most merchants review in their first month, so this reflects when people write — not how long they stay.
Recent merchant reviews

The newest 8 of 23. 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!

Developer repliedThank you so much for sharing great feedback. :) It’s always amazing to hear that we’ve been successful in our goal of providing our customers with the best possible experience. Show more

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.

Developer repliedThank you so much for sharing the wonderful experience. I’m glad to hear that you’re enjoying your experience with our app. Feel free to contact us for any queries at support@scriptengine.net or in-app chat, we are always happy to help you. Show more

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.

Developer repliedThank you very much for your great & wonderful feedback, It puts a big smile on our face. We are grateful to have a client like you. :) :) For any queries, feel free to contact us at support@scriptengine.net, we are always happy to help you. Show more

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!

Developer repliedThank you very much for sharing your great & valuable experience with our service and app!! It means a lot to us!! For any queries, feel free to contact us at support@scriptengine.net, we are always happy to help you. Show more

Back In Stock! Alert Engine FAQ

Answered from this app's own listing and its full review record.

Best suited for stores using Klaviyo Email Marketing, Notify me and Omnisend Email Marketing, which it integrates with and willing to start free and move to $4/mo.

There is a free plan, paid plans start at $4/month, and run to $12/month across 4 published tiers. Prices are as listed on the Shopify App Store and can change — confirm before installing.

Back In Stock! Alert Engine's plans are separated by features rather than by store size — none of the tiers is capped on a volume you could state up front. Compare what each step adds over the one below it rather than trying to size yourself into a tier.

On our scorecard Back In Stock! Alert Engine rates 77 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.

23 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.

Quick facts
At a glance
Merchant rating

4.9 / 5 · 23 reviews


Rating, last 12 months

5.00 from 13 reviews


New reviews, last 12 months

13 (was 9)


Developer replies

15 of 22 reviews


Typical reviewer had used it

6 days


Pricing

Free plan available. Free trial available.


On the App Store since

December 23, 2024


Review history held

2025 – 2026

Integrates with
Checkout
Shopify Admin
Klaviyo Email Marketing
notify me
Notify me
Omnisend Email Marketing
out of stock
pagefly

Categories
Email marketingStock alerts
Will AI shoppers find this store?

Apps like this one convert the traffic you already have. Getting recommended by ChatGPT and Perplexity is a separate problem.

Run a free readiness check
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