Stockouts happen.
Lost sales don't have to.

With instant back in stock alerts, seamless preorders and advanced analytics on product demand, STOQ has everything you need to go from 'Sold out' to 'Sold again'.

Install the App
★★★★★
1,700+ reviews
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Image show Stoq features
Image show Stoq features
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Image show Stoq features
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Image show Stoq features
Image show Stoq features
Image show Stoq features
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Image show Stoq features
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Trusted by 18,000+

stores around the world

Product Demo

Sell more, even when you're out of stock

STOQ gives you the tools to turn lost sales into revenue. Automate preorders, send back-in-stock alerts, and keep customers engaged - so you never miss an opportunity to sell.

Features

Features to help you sell more, effortlessly

Conversion optimized features targeted at capturing demand and driving sales

Preorders

Pre Orders – Sell Before Restocks

Customizable pre order button
Automated order fulfillment
Partial payment & inventory-based limits
Back-in-Stock

Back-in-Stock Alerts – Never Miss a Sale

Automated Email & SMS notifications
Priority waitlists for high-demand products
Customizable alert messages
Analytics

Analytics – Get Data-Driven Insights

Track preorder & restock demand
Analyze stockout trends
Improve forecasting & inventory planning
Our Numbers

Our numbers speak for itself

Merchants love STOQ
18,000+
Back in stock alerts sent
13M+
Preorders
300K+
Sales unlocked
$155M+
Why us?

Here's why you need STOQ

Built for Shopify

With native integration for effortless setup

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Built for ROI

Merchants spending $1 on STOQ see at least $100 in return - 100x ROI

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Scales with you

We have everything you need from starting out to scaling up worldwide

Fully customizable

To match your brand’s alerts
and workflows

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Free Resources & Guides

To help you optimize back-in-stock and pre-order strategies

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Fast & knowledgable support

To help you maximize results

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Advanced rules & triggers

To automate alerts based on real-time
inventory changes

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New updates every month

New features and updates released at startup speed

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Works with your stack

Integrates with all major apps

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Loved by 18,000+  Shopify Merchants

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"STOQ is a must-have for your store. It not only provides a great feature but it also recovers sales for you and should pay for itself. Support is friendly and easy to talk to, and FAST! Great app and great team behind it!"

SwitchButtons, USA
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“I have been using this App on Multiple Stores for about 8 months and have been waiting to leave a review until I had fully tested it. And it is better than any Back In stock App I have used before, and I tested a few and this is really miles better.”

B2B CA, Canada
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“If I could give them 6 stars, I would! Anaam and the team at Stoq have been incredibly helpful and made my migration super simple. This app started generating pre-order sales immediately and has already proven its worth. I highly recommend Stoq for your Shopify store.”

Axeman.ca, Canada
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The team behind 'Preorder, Back In Stock ‑ Stoq' has been fantastic to work with. They were incredibly helpful and responsive, quickly assisting me with the setup of the app and making sure it was customized exactly to fit my store’s needs."

Downtown Distillery UK, United Kingdom
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This is one of the best apps we’ve discovered recently. The preorder feature is exactly what we needed. Installation was seamless, and any theme-integration hiccups were resolved within minutes—or a few hours at most—by their fantastic support team.

Alpine Nation Outdoor Clothing, Canada
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It's a huge upgrade on the previous app we were using and the support team is honestly the best we've come across anywhere

Mount Kiwi, New Zealand
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Great app with fantastic support. They helped us configure a custom restock notification button on our custom theme. An intuitive admin with awesome features. Highest recommendations for this app!

Garrett Leight, USA
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Used this for our first preorder and it worked great. Love the out of stock notifications as well. The app tags every preorder which you can use to route them through a different import process.

PowerBlock, USA
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Downloaded in a panic as another app was unresponsive during a critical time and this app has been amazing! I had an issue setting it up but Sneha at support was so diligent and efficient. It was amazing to communicate with and get my pre-order product up.

Unndr, USA
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Great app, intuitive and easy to setup. Amazing customer service as well- very responsive and helpful!

DIBS Beauty, USA
FAQ’s

Got questions? We have the answers

How do preorders work on Shopify?

Preorders enable customers to purchase products before they are available, ensuring businesses capture demand early. Orders are processed immediately or upon restock, depending on store settings.

Do preorders support discount codes and installment payments?

Yes, Shopify’s preorder system integrates with discount codes and payment plans, including Buy Now, Pay Later (BNPL) options.

Can I customize the preorder messaging on my store?

Yes, businesses can modify preorder buttons, product descriptions, and checkout messages to set clear expectations for customers

Will customers be charged immediately for preorders?

Shopify provides two options: charge customers upfront at checkout or authorize payment to be captured when the product is ready to ship.

Can I set preorder limits on certain products?

Yes, Shopify allows merchants to set quantity limits on preorders to prevent overselling and better manage inventory.

Do back-in-stock alerts work for product variants?

Yes, alerts can be triggered for specific variants (e.g., size, color) so customers are notified only when their selected option is available again.

Can I track how many customers signed up for back-in-stock alerts?

Yes, STOQ provides analytics on product demand, showing how many customers signed up and conversion rates after restock.

Does Shopify have a built-in back-in-stock alert system?

Shopify does not offer native back-in-stock notifications, but apps like STOQ provide automated alerts with seamless integration.

Can back-in-stock notifications be customized?

Yes, businesses can personalize email and SMS notifications to align with their branding, including messaging, timing, and design.

How do back-in-stock alerts work?

Back-in-stock alerts notify customers via email or SMS when an out-of-stock product is restocked. Customers opt in directly from the product page, ensuring they don’t miss their desired item.

How do low stock warnings improve sales performance?

By signaling limited availability, low stock alerts increase purchase urgency, drive faster conversions, and help reduce unsold inventory.

Can I send low stock alerts via email and SMS?

Yes, businesses can automate low stock notifications through multiple channels, including email and SMS, to maximize conversions.

Do low stock alerts work for individual product variants?

Yes, low stock warnings apply to specific variants such as size or color, ensuring customers receive accurate availability updates.

Can I set custom stock thresholds for low stock alerts?

Yes, merchants can define inventory thresholds (e.g., alert customers when stock drops below five units) to optimize urgency messaging.

What are low stock warnings, and why are they important?

Low stock warnings create urgency by notifying customers when inventory is running low, encouraging faster purchases and reducing abandoned carts.