Email & Retention

Back in Stock

An automated notification sent to customers who requested alerts on a sold-out product when inventory returns. Near-guaranteed opens, high conversion.

Back-in-stock notifications are automated emails or SMS sent to customers who signed up to be alerted when a sold-out product returns to inventory. Because the signup explicitly captures intent, open rates often exceed 70% and conversion rates are 8-20x typical email campaigns.

Implementation is usually a one-click Klaviyo flow or a dedicated app (Back in Stock, Restock Rocket). The only trick: capture the signup with an SMS option too — SMS back-in-stock opens fire 90%+ and convert 15-25%.

Related terms in Email & Retention
Abandoned Cart
The email/SMS flow triggered when someone adds to cart but doesn't complete checkout. Typically recovers 5-15% of abandoned revenue — the single highest-ROI flow.
Browse Abandonment
A flow triggered when someone views a PDP but doesn't add to cart. Lower recovery than abandoned cart but wider funnel — catches people before commitment.
Campaign
A one-time email or SMS blast sent to a segment on a specific date. The counterpart to a flow: deliberate, calendar-driven broadcasts rather than triggered automations.
Deliverability
The percentage of your emails that actually land in the inbox (not spam or promotions tab). Protected by list hygiene, sender authentication, and low complaint rates.
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