# Back in Stock by Amp

> Back in Stock by Amp is the original Shopify back-in-stock app, founded in 2011. It turns out-of-stock demand into revenue: capture demand with customizable signup forms 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. 112,000+ installs, 4.9 stars from 820+ reviews, Built for Shopify.

Install: https://apps.shopify.com/back-in-stock (free plan available, 14-day trial on paid plans)

## Key facts

- Founded 2011 — the original Shopify back-in-stock app, trusted by some of the biggest DTC brands.
- Built for Shopify status (Shopify's highest app quality standard).
- 4.9-star rating from 820+ reviews on the Shopify App Store; 112,000+ merchants have used it.
- Restock alerts via email, SMS, and web push, in multiple languages, within 60 seconds of restock.
- Preorders with full payment, partial deposit, or discount incentives — included from the Starter plan up, no per-preorder fees.
- Pricing: Free ($0, up to 10 notifications/month), Starter ($19/mo, 500), Growth ($49/mo, 2,000, most popular), Pro ($99/mo, unlimited). Flat plans with opt-in notification top-ups — no automatic usage-based overage fees. SMS billed per message. All prices USD.
- Integrations: Klaviyo, Mailchimp, Campaign Monitor, Zapier, Constant Contact, PageFly.
- Used by brands including Skims, Red Bull, Alo, and Kylie Cosmetics.

## Pages

- [Home](/): What Back in Stock does — capture, convert, preorders, analytics.
- [Pricing](/pricing): Full four-tier pricing, trial terms, and how pricing works.
- [Compare](/compare): Back in Stock vs every major Shopify restock-alert app — feature and pricing matrix.
- [vs Notify Me!](/compare/back-in-stock-vs-notify-me)
- [vs STOQ](/compare/back-in-stock-vs-stoq)
- [vs Kbite](/compare/back-in-stock-vs-kbite)
- [vs REZ](/compare/back-in-stock-vs-rez)
- [vs Essent](/compare/back-in-stock-vs-essent)
- [Best Shopify back-in-stock app](/best-shopify-back-in-stock-app)
- [Best Shopify preorder app](/best-shopify-preorder-app)
- [Recover lost sales from out-of-stock products](/recover-lost-sales-out-of-stock-products)

## Company

Back in Stock is built by Amp (https://useamp.com), the Profit Platform for Shopify — a suite of integrated apps used by 45,000+ eCommerce brands, including Lifetimely (profit analytics), Slide Cart, Bundles, and Upsell.