Back in Stock Mailer lets customers join a waitlist for a sold-out variant and emails them in your brand, from your own domain, when stock returns.
View in the Shopify App Store ⚡️Sold out does not have to mean a lost sale. Back in Stock Mailer adds a sign-up block to your product page. When a variant is restocked, everyone waiting gets one email in your design, checked against live stock first.
You decide the pace: send in waves, wait for a minimum stock level, or pause a variant and send by hand. Templates per language, Flow triggers and reports are there when you grow. Your list stays yours: import it from another app, export it any time. There is a free plan.





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