Skip to content
WhatsApp

Back-in-stock alerts

Out of stock today isn't a lost sale.

Customers tap "Notify me" on a sold-out product and join a WhatsApp waitlist tied to that exact variant. When inventory syncs back, every opt-in gets an instant alert with a reserve window — and around one in five orders within 24 hours.

  1. 01

    Tap 'Notify me' on sold-out page

    100%

  2. 02

    Restock alert delivered

    95%

  3. 03

    Tap through to product

    51%

  4. 04

    Order placed in reserve window

    22%

Use cases

How back-in-stock alerts teams use InfiQ

One-tap waitlist capture

A 'Notify me on WhatsApp' button on sold-out product pages opens a pre-filled chat — opt-in takes one tap, no forms or email fields.

Inventory-triggered sends

Shopify, WooCommerce or API webhooks fire the alert automatically when stock crosses your threshold — typically within 5 minutes of sync.

Reserve windows

Hold a unit for each alerted customer for 2–24 hours; a visible deadline in the message is what pushes most orders into the same day.

Variant-level matching

Waitlists are tied to exact size and colour, so a UK 9 restock never pings the customer waiting on a UK 7.

Batched queue sends

When the restock is smaller than the waitlist, alerts go out in sign-up order and pause once reserves equal inventory — no overselling.

Alert-to-order attribution

Tagged buy buttons and order webhooks report waitlist conversion per product, so you know which restocks to prioritise next.

9:41
B

Bombay Sole Co.

online

TodayMessages are end-to-end encrypted. No one outside of this chat can read them.
Notify me — Cloudrunner 2, UK 914:04

Done, Rhea. You're #12 on the waitlist for the Cloudrunner 2 (UK 9). We'll message you the moment it's back.14:04

Back in stock

The Cloudrunner 2 (UK 9) just landed. We're holding one pair for you until 22:42 tonight.18:42

Buy now

Release my hold

Ordered! That was fast 🙌18:49

Order #4821 confirmed — ships tomorrow from our Bandra store. Tracking will land right here.18:50

Message

The customer experience

What back-in-stock alerts customers see

Verified business name, rich templates and tap-to-act buttons — a conversation, not a notification.

Measurable outcomes

The numbers back-in-stock alerts teams track

Every journey is measured end to end — from first message to the business outcome — inside one analytics view.

Analytics · Back-in-stock alerts Last 30 days

Journey funnel

Tap 'Notify me' on sold-out page100%
Restock alert delivered95%
Tap through to product51%
Order placed in reserve window22%

waitlist-to-order conversion

22%

from restock sync to alert

<5 min

more orders than email alerts

Talk to InfiQ

Put WhatsApp to work for back-in-stock alerts

Tell us your use-case — we’ll tailor the templates and flows and estimate the cost.

Step 1 of 2
WhatsApp

Protected by invisible spam checks · replies within 1 working day

FAQ

Frequently asked questions

Do customers need to opt in before I can send restock alerts?

Yes — WhatsApp requires prior opt-in for business-initiated messages, and the 'Notify me' tap itself is that opt-in. InfiQ stores a consent record with timestamp and source for every subscriber. Customers can leave the waitlist with a single reply, and opt-outs are enforced automatically.

Does the restock alert template need Meta approval?

Yes. You submit the message once as a template and Meta typically approves it within a few hours. Depending on wording, Meta may classify it as utility or marketing — which changes the per-message rate — so InfiQ previews the likely category before you submit.

How does InfiQ know a product is back in stock?

Native integrations with Shopify and WooCommerce listen for inventory webhooks, and a REST API covers custom carts and ERPs. You set the trigger threshold — for example, fire when stock crosses 10 units — and the alert goes out within minutes of the sync, with no manual send.

What if 500 people are waiting and only 40 units come back?

Send in batches. InfiQ alerts the waitlist in sign-up order (or a ranking you define), holds stock through each reserve window, and pauses the queue when reserved units match inventory. Nobody gets an alert for a product that's already gone again.

How do I know the alerts are actually driving orders?

Every buy button carries tracking parameters, and order webhooks tie purchases back to the specific alert. The dashboard shows delivered, read, clicked and converted per product and per batch, so you can compare waitlist conversion against your email notify list.

What happens when a reserve window expires without a purchase?

The hold releases automatically and the unit returns to the pool for the next batch. You can send one expiry reminder 30–60 minutes before the window closes, but frequency caps stop anyone getting more than one restock alert per product.

Meta Business Partner

Send your first message today.

Get set up on the official WhatsApp Business API and go live in 2 hours — with a team that answers when you call.

7-day free trial Enterprise-grade reliability Live in 2 hours Built for Indian businesses