Back-in-stock notifications send an email or LINE message to customers waiting for a sold-out product the moment it comes back in stock.
StoreCRM does more than blast everyone at once. You can design the whole flow around how your store sells — how many people are notified based on stock levels, in what order, at what intervals, and under which conditions they are notified again.
Back-in-stock notifications outperform regular newsletters
Across StoreCRM's delivery data, back-in-stock notification emails beat regular email newsletters on every metric: open rate, click rate, conversion rate, and revenue per email.
| Metric | Back-in-stock emails | Regular newsletters | Difference |
|---|---|---|---|
| Open rate | 66.0% | 26.5% | ~2.5x |
| Click rate | 20.4% | 2.1% | ~9.7x |
| Conversion rate | 6.29% | 0.09% | ~70x |
Revenue per email was also roughly 40 times higher than regular newsletters.
Customers who sign up for a back-in-stock notification have already shown interest in the product. Because the message arrives at the exact moment the product can be purchased again, it tends to draw a far stronger response than a bulk newsletter.
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The aggregation period covers all deliveries in StoreCRM (excluding test deliveries): 178,791 back-in-stock notifications and 19,642,098 regular email newsletters. Back-in-stock notifications are classified as automated deliveries triggered by restocking; regular newsletters are manual campaigns sent in bulk from the admin.
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Conversion rate and revenue are based on orders that StoreCRM attributed to each delivery (the attribution window follows the system's own logic).
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This comparison is an observation based on StoreCRM's delivery data and does not demonstrate a causal effect of back-in-stock notifications.
What StoreCRM's back-in-stock notifications can do
Notify customers by email and LINE
Customers can receive back-in-stock alerts through whichever channel suits them: email or LINE.
With one-step LINE back-in-stock alerts, customers can sign up straight from the product page just by linking their LINE account — no store login required. For customers who are already logged in with a linked LINE ID, you can even enable one-click signup.
Deliver in step with your inventory and sales strategy
Flexibly configure how many people are notified, in what order, at what intervals, and when they are re-notified. For products that come back in small quantities, you can notify subscribers in stages matched to your stock levels instead of alerting everyone at once.
- Set the number of people notified as a fixed count or based on stock levels
- Choose delivery order: oldest signups first or newest first
- Configure batch size, delivery intervals, and re-notification conditions
- Set a minimum stock threshold and optionally notify wishlist subscribers too
- Hold notifications until a time specified in a product metafield (works with inventory management system integrations)
Track signups in lists and reports, then feed your next CRM campaign
The back-in-stock list in the admin shows exactly who is waiting for which product. You can also build customer segments from signups for specific products and use them in follow-up email and LINE campaigns.
Reports break down signup and delivery counts by product, variant, and channel, along with open rates, click rates, and revenue — all exportable to CSV. Knowing which products customers are waiting for helps inform purchasing, restocking, and your next campaigns.
From signup to purchase
- A customer signs up for notifications on a sold-out product
- The product comes back in stock
- StoreCRM automatically sends email and LINE notifications under your configured rules
- The customer returns to the product page from the notification and buys
No more manually pulling lists of waiting customers or sending emails product by product after every restock.
Tailor the signup experience to your store
Adapt the signup flow to your membership strategy: allow guest email signups, restrict signups to members, or let logged-in customers register with a single click.
You can also customize the wording, colors, and design of the button and signup screens, the "already signed up" state, and the display text for multilingual stores.
FAQs
Can I notify customers by both email and LINE?
Yes. Customers can sign up for back-in-stock notifications by email or LINE.
Does it work for small restocks?
Yes. You can adjust how many people are notified based on stock levels and deliver to subscribers in stages.
Can guests sign up?
You can choose between allowing guest email signups and directing customers to log in or create an account first.
Back-in-stock notifications, built around how you sell
From email and LINE notifications to stock-aware delivery rules and customer management, StoreCRM covers it all in one app.
Setup guides
For setup steps and details on each option, see the back-in-stock email setup manual.