Turn out-of-stock demand into revenue

Capture and convert buyer demand with customizable signup forms, instant notifications, and built-in preorders.

Chosen by leading brands

Back in Stock by Amp is the original Shopify back-in-stock app, founded in 2011. It turns out-of-stock demand into revenue across the full demand lifecycle: capture demand with customizable signup forms, pop-ups, and "Notify Me When Available" buttons; convert it with instant email, SMS, and web push restock alerts sent within 60 seconds; take preorders with full or partial payment; and analyze demand to plan inventory and marketing.

💎 Built for Shopify

Back in Stock meets Shopify's highest app quality standards with Built for Shopify status.

★ 4.9

Back in Stock has a 4.9 star rating from 820+ reviews on the Shopify App Store

112,000+ installs

More than 112,000 Shopify merchants have used Back in Stock to grow revenue.

Why Back in Stock

The original — since 2011

Back in Stock created the Shopify back-in-stock category in 2011, years before today's restock-alert apps. 112,000+ merchants have used it since.

Full-funnel, not just alerts

Capture demand, convert it with multi-channel notifications, sell it early with preorders, and learn from it with analytics — one app across the full demand lifecycle.

Instant, multi-channel delivery

Customers are notified within 60 seconds of a restock via email, SMS, and web push — brand-matched and available in multiple languages.

Flat, predictable pricing

A genuine free plan plus flat tiers at $19, $49, and $99 per month. No automatic usage-based overage fees — top-ups are your choice, never a surprise line item. See pricing or compare alternatives.

Capture demand

Capture buyer demand with customizable signup forms and pop-ups

Install and start sending alerts in minutes, match your Shopify theme, and capture buyer demand with customizable signup forms, pop-ups, and "Notify Me When Available" buttons.

Never miss a sale

Capture buyer demand in the moment to avoid lost sales, and use this data to inform your marketing strategies.

Customize design to match your brand

Back in stock buttons, forms, and pop ups can be fully customized to fit seamlessly with your store.

Boost upsells and cross-sells

Use demand insights to promote similar or premium products for higher AOV.

Convert demand

Turn restocks into sales with instant and scheduled customer notifications

Instantly convert restocks into sales with automated email, SMS, and web push notifications in multiple languages. Recover lost revenue while controlling delivery timing, audience size, and branding.

Instant and scalable delivery

Notify customers within 60 seconds of a restock for immediate conversions.

Full control over notifications

Manage delivery settings to control how many customers get alerts at once, ensuring a smooth and manageable sales flow.

Brand-aligned messaging

Customize email, SMS, and push notifications to match your store's look and voice and deliver notifications in multiple languages.

Boost sales

Let customers preorder before your collection ships

Set up preorders in minutes, customize buttons and messaging to match your store, and capture buyer intent before launch with flexible payment options, branded forms, and real-time demand insights.

Predict demand and boost your bottom line

Optimize cash flow and demand forecasting with preorders.

Get paid your way

Flexible payment options including full payment, partial deposit, or discount-based incentives to drive conversion and improve cash flow.

Seamless design. Zero code.

Fully branded preorder buttons, forms, and messaging—customized to your theme, device type, and language. Set up in minutes, no code required.

Plan smarter with real demand data

Use preorder demand insights to improve inventory planning, launch timing, and prioritize products your customers want most.

Track performance

Identify high-demand products for better inventory and marketing strategies

Use detailed analytics to track customer demand, notification performance, and conversion impact. Leverage real-time insights to optimize inventory, refine marketing strategies, and drive upsells and cross-sells.

Track conversions and sales impact

Measure the direct revenue generated from Back in Stock notifications.

Optimize inventory and demand planning

Identify high-demand out-of-stock products and adjust restocking strategies accordingly.

Refine marketing and upsell strategies

Use customer demand data to target upsells, cross-sells, and personalized campaigns.

Chosen By The Leading Brands

Here's what our customers have to say

"Amazing app I've used for years. It's a breeze to install and customize. I love the detailed reporting it gives on notifications sent, notifications converted and notifications that haven't converted."

"Back in Stock is a great app, it's easy to use and very beneficial to our business. Amp have also been great to communicate with and helped resolve any issues."

"Really great, well-built app. Handles the basics reliably and includes powerful extra features that truly set it apart. Support is excellent - had a small issue with the back-in-stock button not displaying correctly on variants, and James H. resolved it within seconds. Definitely a five-star app."

"One of the originals and still the best back in stock application for shopify. Features constantly added and support that is second to none."

Drive engagement and sales with intent-driven insights and seamless integrations

Seamless integrations for enhanced engagement

Integrates with platforms like Klaviyo, Mailchimp, PageFly, Campaign Monitor and more, ensuring a cohesive experience and smooth workflows across all customer touchpoints.

Optimize product assortment and buying decisions

Use buyer intent insights to inform your product assortment strategy. Understand which products are in high demand and strategically stock similar products to meet customer needs.

Intent-driven recommendations and alternatives

Use intent data to personalize marketing efforts by directing customers to alternative products they're likely to buy when an item isn't restocking.

We integrate with the platforms commerce brands use everyday

Connect to Shopify to add Back in Stock buttons, pop ups and forms that match your theme.

Connect Klaviyo to Back in Stock to sync your signup lists with segments and campaigns.

Enable customers to opt-in to Campaign Monitor mailing lists when signing up for a Back in Stock notification.

Connect Back in Stock with Zapier and your Zaps will automatically receive new notifications.

Enable customers to opt-in to your Constant Contact mailing list when signing up for a Back in Stock notification.

Sync customer data from Back in Stock to Mailchimp to run smart campaigns.

Display the Back in Stock button in your PageFly pages.

Simple pricing that scales with your store

Try Back in Stock completely free for 14 days

Free

per month

Up to 10 notifications per month
Unlimited registrations
Follow-up notifications
Notify Me button and form
Multi-language support
Activity reports

Up to 500 notifications per month
Unlimited preorders
Unlimited registrations
SMS notifications
Customizable Notify Me button and form
Follow-up notifications
Multi-language support
Activity reports

Start a Free Trial

Frequently asked questions

What is Back in Stock?

Back in Stock by Amp is the original Shopify back-in-stock app, launched in 2011. More than 112,000 Shopify merchants have used it to turn out-of-stock demand into revenue: capture demand with customizable signup forms, pop-ups, and "Notify Me When Available" buttons; convert it with instant email, SMS, and web push notifications; take preorders; and analyze demand to plan inventory and marketing.

Is Back in Stock free?

Yes. Back in Stock has a genuinely free plan that includes up to 10 notifications per month with unlimited registrations. Paid plans are Starter at $19/month, Growth at $49/month, and Pro at $99/month, each with a 14-day free trial.

What if I am not sure which plan is best for my business?

Start on the Free plan ($0/month) and upgrade when you need more notifications. Most merchants choose Growth at $49/month — it includes up to 2,000 notifications per month plus integrations like Klaviyo and Mailchimp. You can move up or down between Starter ($19), Growth ($49), and Pro ($99) at any time.

How does the free trial period work?

All paid accounts come with a no obligation 14 day free trial. Feel free to cancel your plan at any time in the first 14 days, and you won't be charged.

Does Back in Stock charge usage-based overage fees?

No. Plans are flat — if you use up your monthly notification allowance, nothing is billed automatically. You choose to purchase an additional notification pack (packs never expire) or upgrade your plan. SMS notifications are billed per message on top of the plan price, the same per-SMS model competitors use.

Does Back in Stock support preorders?

Yes. Preorders are included from the Starter plan ($19/month) up, with full payment, partial deposit, or discount-based incentive options.

Can I send SMS and push notifications, not just email?

Yes. Back in Stock sends instant and scheduled restock notifications via email, SMS, and web push, brand-matched to your store and available in multiple languages.

How fast are restock notifications sent?

Customers are notified within 60 seconds of a restock, so high-intent buyers can purchase before inventory sells out again.

Is Back in Stock Built for Shopify?

Yes. Back in Stock holds Built for Shopify status, Shopify's highest app quality standard, and has a 4.9 star rating from more than 820 reviews on the Shopify App Store.

How do I know how many notifications I have left on my plan?

Your remaining notifications for the month are shown on the main app dashboard, and also on the Plans page.

Never miss a sale with Back in Stock

Try Back in Stock for Free