Stock alerts apps for Shopify
Who uses each stock alerts app, from Alert's storefront scan. Each profile shows where the app's stores are based, what they sell, their Shopify Plus share and the apps they run alongside it.
What stock alerts apps do
Back in stock apps let shoppers sign up to be told when a sold out product or variant is available again, by email, SMS or push. For a merchant they keep demand that would otherwise leave the store and show which items to reorder first.
What to compare when choosing
- Notification channels included
- Variant level signups and automatic sends on restock
- Pre-order options for items not yet back
- Reports on demand per product
- Pricing by notifications sent
Stock alerts apps side by side
Ratings and plans from the Shopify App Store, November 2026; store shares from Alert's scan.
| App | App Store rating | First paid plan | On Shopify Plus | Median catalog | Outside the US |
|---|---|---|---|---|---|
 Kbite | 5.0 (4,374) | $5/mo | ~9% | 142 | 72% |
 Amp | 4.9 (988) | $19/mo | ~20% | 154 | 59% |
Kbite has the most App Store reviews of the stock alerts apps profiled here. Ratings range from 4.9 to 5.0 stars.
2 of the 2 apps list a free plan: Kbite, Amp.
The share of stores on Shopify Plus runs from ~9% for Kbite to ~20% for Amp, against ~4% across Shopify as a whole.
Median catalog size ranges from 142 products (Kbite) to 154 (Amp).
Kbite has the largest share of stores based outside the United States, at 72%.
The largest store category for these apps: business and industrial, fashion.
The stock alerts apps at a glance
Kbite Back in Stock
Kbite is rated 5.0 stars across 4,374 App Store reviews and has a free plan and paid plans from $5 to $19 a month. In Alert's scan, ~9% of its stores run Shopify Plus, the median store lists 142 products, and 72% are based outside the United States. Its largest store category is business and industrial.
Amp Back in Stock & Preorder +
Amp is rated 4.9 stars across 988 App Store reviews and has a free plan and paid plans from $19 to $99 a month. In Alert's scan, ~20% of its stores run Shopify Plus, the median store lists 154 products, and 59% are based outside the United States. Its largest store category is fashion.
Stock alerts apps FAQ
Which stock alerts app for Shopify has the most reviews?
Of the stock alerts apps Alert profiles, Kbite has the most App Store reviews: 4,374, rated 5.0 stars, as of November 2026.
Is there a free stock alerts app for Shopify?
Yes. Kbite, Amp list a free plan on the Shopify App Store, as of November 2026.
Which stock alerts app has the most upmarket stores?
Measured by the share of each app's own stores on Shopify Plus, Amp ranks highest of the stock alerts apps profiled here, at ~20%.
Shares of Shopify stores Alert detected running each app, as of November 2026. App names are trademarks of their owners. Alert is not affiliated with these developers.