Amp: Back in Stock & PreOrder+

by HEL SG PTE LTD · Free plan available.

4.9 (819) on Shopify Used by 25,605 Shopify stores

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Capture Sales with Back in Stock Alerts & Preorders. Trusted by the biggest D2C brands since 2011.

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About Amp: Back in Stock & PreOrder+

Every out-of-stock product is a customer about to leave forever. Amp: Back in Stock & PreOrder+ captures them with a "Notify Me" button, builds a waitlist, and auto-fires alerts the moment you restock - via email, SMS, or push. Pre-sell upcoming drops and collect revenue before inventory lands. Wishlists and low-stock alerts let you capture intent at every stage. Built for high-SKU catalogs. Set up in minutes. Hundreds of millions of alerts delivered across 25,000+ brands since 2011. Instant restock alerts via email, SMS & push - recapture buyers automatically Preorder & pre-sell: collect payment before your inventory even arrives Wishlists & low-stock alerts - capture demand at every stage of the journey Fully branded Notify Me & Preorder buttons - set up in minutes, no code needed Demand insights: know exactly what to restock, when, and how much to order Show more Show less

Last verified: July 12, 2026 · Fresh

App details

Developer: HEL SG PTE LTD
Category: Marketing & conversion
Pricing: Free plan available
Rating: 4.9 (819) on Shopify

Key features

Capture Sales with Back in Stock Alerts & Preorders
Trusted by the biggest D2C brands since 2011

Integrations with:

Flow, Klaviyo, MailChimp, Shopify Admin, Shopify Flow, Upsell by AMP, Zapier

4 plans · starts free · 14-day free trial

Free

$19/month

$29/month

$49/month

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 87 Shopify App Store reviews

Use the arrows to read individual reviews

Love this app. We have been using it for a while. Any issue we run into, they are very quick to respond! Leslie helped me this morning. Was very thorough!

— Fostered Collection

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— Whiskers N Paws

Good app. The customer service is really good to. They will help you with any issues you run into. Overall its pretty easy to use though.

— Vanish Brand

So helpful and quick at replying! Even asked me to just email the CSV to them and they did the import for me. - Thank you Leslie and Chris for your help

— Noritake Australia

Fast responses! Looked into my issue and was helpful right away!

— Sami Jewels

Great support & quick replies from Leslie, thanks!

— Koreanbeauty - Your K-Beauty Store Online ♥

Just started using this and works pretty seamlessly and they have rock star level customer support. Looking at you, Leslie!

— Christmas Place

Had great support when I first installed this app 6 years ago, however recent support experience has been disappointing. Support denied that their app was causing the issue I was experiencing, told me to contact Shopify support. Shopify support said it was highly likely the app was causing the issue, so went back to support who escalated it to Tier 2, whatever that means - still haven't heard an...

— Rosa Bloom

This app has done wonders in connecting our brand managers to our customer demand. We recently encountered an anomaly and reached out to their live chat assistant for advice and a possible explanation as to why our alerts were appearing more frequently. I was connected to Leslie H and her attentiveness and personable approach gave me all the answers I was looking for - She even explained things a...

— Stratstone Shop

Mauro was excellent in his support. It's a good service and good customer experience.

— Thocc Exchange

Leslie H. is so nice, she solved my problem very fast. I love this app!

— Elihome

Whatever you do, don't even think about downloading this app. You can't manage anything on your own; you need a customer representative for everything, but there aren't even any to contact. I send emails, and they only respond after three days. It's truly awful. Please don't waste your time using this app.

— REVEA

Thanks to Mauro A. and Manny C. for quick support!

— Stick With Me Sweets

Works great! and chill chat rep guy! love it

— Freedom Moses

This app is so helpful and the staff has very fast technical support. Leslie H. fixed our button problem quickly with no issues.

— Impressions Vanity Co.

Easy-to-use and very practical app whenever you need support. Leslie has been incredibly helpful and responsive, making the whole experience smooth and efficient. Highly recommended!

— LOFT the Store

Customer service is top tier and answered our questions very quickly! Happy we made this decision and would highly recommend them!

— Crissy Marie Luxe Hair

I was going around in circles trying to fix an issue with Shopify Sidekick and finally admitted defeat and reached out to Amp's support. I didn't have to wait 24 hours for a reply, I didn't have to go through an AI chat bot, I immediately got the help I needed and within 10 minutes Manny had fixed the problem! Excellent CS team

— Gentle Fawn

I'm happy with the function of the app, and the price is fair for what it does. I needed some support and ask the support team for assistance with activating the app embed in a new theme we used, and bang! After I got back from lunch, it was done. So I'm overall happy with this app and would recommend it. Leslie Hernandez was the support staff that helped.

— Lash Oasis Europe

We've been using Back in Stock for years and it's been wonderful for our remarketing of products once they come back in Stock. Huge revenue implications for reprints of sold-out designs. We have this app on 20 of our stores- truly crucial to our operations... The new native embed app in the Shopify Admin has been a nice change. I've reached out to support a handful of times to bulk archive product...

— Atta Boy

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