WhatsApp back-in-stock restock, wishlist & pre-order templates
Notify-me capture on the sold-out PDP, Utility-category restock alerts on inventory webhook, throttled sends to prevent overselling — Shopify and WooCommerce native.
- Utility-category compliant
- Auto-fire on inventory webhook
- Throttled to prevent overselling
Key things to know
Notify-me PDP widget
One-tap WhatsApp opt-in on every sold-out variant — captures number + SKU.
Inventory webhook listener
Shopify / WooCommerce — fires the Utility template the moment stock returns.
Stock-aware throttle
Release alerts in waves matched to current inventory — no overselling.
Per-variant capture
Subscribe per size/color, not just per product — sends only when the right variant restocks.
People also ask
Q.Is a restock alert Marketing or Utility?
If the customer explicitly opted-in for THIS product (notify-me), it qualifies as a Utility template — cheaper and approved faster. Blast-to-list restocks are Marketing.
Q.How do customers opt-in for notify-me?
Add a 'Notify on WhatsApp' button to your sold-out PDP. LandinChat captures the number + product SKU and fires the template when stock returns.
Q.Can I auto-trigger from Shopify/WooCommerce?
Yes — the inventory webhook fires when stock returns. LandinChat dispatches the Utility template to everyone subscribed to that SKU.
Q.How do I prevent overselling?
Throttle the send — release the alert in waves of 20–50 per minute, gated by current stock level. LandinChat does this automatically.
Q.What CTR should I expect?
Notify-me restock alerts clear 70–85% CTR and 25–40% conversion — the highest-intent segment in ecommerce.
Q.Can I capture pre-orders for unreleased SKUs?
Yes — same Flow, but the Utility template confirms pre-order and charges via payment link or deep-link checkout.
Why notify-me restocks are the highest-ROI WhatsApp send
Customers who tap 'Notify me' on a sold-out PDP are pre-qualified — they wanted the product, they couldn't have it, they raised their hand. The conversion math beats every other ecommerce sequence.
Because the customer explicitly opted-in for that exact SKU, the restock alert qualifies as a Utility template — cheaper than Marketing and faster to approve.
LandinChat captures the number + SKU on the PDP widget, listens to the Shopify/WooCommerce inventory webhook, and dispatches the Utility template in throttled waves to prevent overselling.
Built for serious growth teams
Notify-me PDP widget
One-tap WhatsApp opt-in on every sold-out variant — captures number + SKU.
Inventory webhook listener
Shopify / WooCommerce — fires the Utility template the moment stock returns.
Stock-aware throttle
Release alerts in waves matched to current inventory — no overselling.
Per-variant capture
Subscribe per size/color, not just per product — sends only when the right variant restocks.
Pre-order template
Same Flow for unreleased SKUs — confirms pre-order with payment-link or deep-link checkout.
Wishlist sync
Sync Shopify, Yotpo and Klaviyo wishlists — broadcast restocks across all captured channels.
Get live in days, not months
- 1
Install PDP widget
Drop the LandinChat snippet into your Shopify / WooCommerce theme — appears on sold-out variants.
- 2
Connect inventory webhook
OAuth — LandinChat listens for stock-return events per SKU and variant.
- 3
Pick Utility template
Restock Alert, Pre-Order Confirm — choose from the library and submit for approval.
- 4
Set throttle rules
Cap sends per minute and per current stock level to prevent overselling.
- 5
Monitor & re-broadcast
Track CTR, conversion, and re-send any non-openers with a 24h follow-up.
WhatsApp restock alert vs email/SMS
| Capability | LandinChat | Email / SMS |
|---|---|---|
| CTR on restock alert | 70–85% | 10–20% |
| Conversion rate | 25–40% | 3–8% |
| Template category | Utility (cheap) | N/A |
| Time to first open | < 2 min | Hours |
| Native PDP widget | Yes | Plug-in |
| Throttled to stock level | Built-in | Manual |
Frequently asked questions
Recover lost demand the moment stock returns
PDP notify-me, inventory webhook, Utility-category restock alerts — ship today.