Back-in-stock alerts for Shopify
A sold-out page should not be a dead end.
Add a notify-me button to out-of-stock products. Shoppers join the waitlist in one tap, and email, SMS or browser push goes out the moment Shopify inventory comes back — no list to export, nothing to send by hand.
Every "when is this back?" email you get is demand you already have. Shelf Alerts collects it on the product page, watches Shopify inventory and pricing, and sends when there is an actual reason to.
The widget appears on sold-out variants and takes an email, a phone number, or a browser push permission — whichever the shopper prefers. It installs as a theme app extension, so there is no theme code to edit.
Restocks, price changes and low-stock thresholds come straight from Shopify webhooks. One alert per event, and only inside the send window you set.
Subscribers, opens, clicks and attributed orders are all in the dashboard. Subscriber and event data can also sync to Klaviyo, Mailchimp, Omnisend, Zapier or GA4 — those connections are best-effort, and a provider outage never blocks the alert itself.
Klaviyo and Mailchimp are good at delivery. What they do not have is the thing on the product page collecting intent, or the Shopify inventory signal that says now. Shelf Alerts is that half, and it hands off cleanly to whatever you already send with.
Turn on what fits your catalog and ignore the rest. Nothing here is held back for a higher tier — plans differ by how many alerts you send, not by what you can switch on.
Email, SMS or browser push, sent automatically when Shopify inventory comes back. Branded templates, your sender, your logo.
A shopper names the price they would pay. You tell them when the product reaches it.
A heart on the product page. Saved items tell you what people want before they are ready to buy it.
Show the real number left when stock runs low. It reads as honest because it is — the count comes from Shopify.
A consent-gated browse pixel records product views, so you can reach people who looked and left.
Built for launch days, replenishment cycles, and the quiet gap behind every sold-out page that has no waitlist on it.
Every feature is on every plan, including Free. Plans differ by how many alerts you can send each month, and by CSV export. Each plan stops at its allowance. Alerts past the cap are not sent and not billed, and you can see how many the cap held back. There are no overage charges, ever.
Enough to put the waitlist live and see whether it earns its keep.
For when the waitlist starts carrying real volume.
For larger catalogs and faster replenishment cycles.
Put a waitlist on it. Install Shelf Alerts, switch on the widget, and find out how many people were waiting on the thing you ran out of.
