{"id":17432,"date":"2026-09-29T10:31:25","date_gmt":"2026-09-29T05:01:25","guid":{"rendered":"https:\/\/www.fast2sms.com\/help\/woocommerce-back-in-stock-notifier-sms-whatsapp\/"},"modified":"2026-09-29T10:31:25","modified_gmt":"2026-09-29T05:01:25","slug":"woocommerce-back-in-stock-notifier-sms-whatsapp","status":"publish","type":"post","link":"https:\/\/www.fast2sms.com\/help\/woocommerce-back-in-stock-notifier-sms-whatsapp\/","title":{"rendered":"WooCommerce Back in Stock Notifier on WhatsApp and SMS"},"content":{"rendered":"

Your best-selling kurta sells out. For the next two weeks, shoppers land on the product page, see “Out of stock” and leave. When the new stock arrives, most of them never find out. A WooCommerce back in stock notifier<\/strong> fixes that: shoppers ask to be told, and the moment you restock, they get a message on the phone they carry everywhere.<\/p>\n

This guide shows how to run WooCommerce back in stock notifications<\/strong> on WhatsApp and SMS with the free Fast2SMS plugin. You will see the “Notify me when back in stock” option on out-of-stock products, how subscribed customers get the Back in stock message, how admin low stock and out of stock alerts keep you ahead of sell-outs, plus template examples and the marketing rules Indian stores must follow.<\/p>\n

Install Free Plugin<\/a>Signup Now<\/a><\/p>\n

\"WooCommerce
From “Notify me when back in stock” to a WhatsApp or SMS alert, in five steps.<\/figcaption><\/figure>\n

How the WooCommerce back in stock notifier works<\/h2>\n

The Fast2SMS plugin handles stock messages in two directions. Customers who asked to be told get the Back in stock<\/strong> event. You and your team get Low stock<\/strong> and Out of stock<\/strong> admin alerts. All three live in the Automations tab.<\/p>\n

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  1. A product goes out of stock. If the Out of stock admin alert is on, your admin numbers get a message.<\/li>\n
  2. Shoppers visiting that product see a “Notify me when back in stock” option and subscribe with their mobile number.<\/li>\n
  3. You restock the product in WooCommerce.<\/li>\n
  4. The Back in stock event runs for the subscribed customers of that product.<\/li>\n
  5. Each subscriber gets your approved template on WhatsApp, SMS or both, unless their number is on your do-not-send list.<\/li>\n<\/ol>\n

    You don’t need a separate stock alert plugin for this. The same free plugin also works as your WooCommerce SMS plugin and WooCommerce WhatsApp plugin for order updates, abandoned carts and campaigns.<\/p>\n

    WooCommerce “notify me when back in stock” on out-of-stock products<\/h2>\n

    The customer-facing part is simple. On a product that is out of stock, the plugin shows a “Notify me when back in stock”<\/strong> option. The shopper leaves their mobile number and goes on with their day. When you restock, the message comes to them.<\/p>\n

    Why a phone number and not an email? In India, a WhatsApp or SMS alert is hard to miss. The shopper sees it on the same phone they used to browse your store, and one tap brings them back to the product. The plugin works with Indian 10-digit mobile numbers.<\/p>\n

    \"WooCommerce
    A WooCommerce store running the Fast2SMS plugin. Out-of-stock products offer a “Notify me when back in stock” option to shoppers.<\/figcaption><\/figure>\n

    A shopper who asks to be told is one of the warmest leads you will ever get. They wanted the product badly enough to leave their number. Treat that request with respect: send one clear message when the product is back, and nothing unrelated.<\/p>\n

    How to set up WooCommerce back in stock notifications<\/h2>\n

    If the plugin is already installed and your API key is in, this takes a few minutes once your template is approved. New to the plugin? Start with the Fast2SMS WordPress plugin setup guide<\/a>.<\/p>\n

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    1. Install and connect.<\/strong> In WP Admin go to Plugins > Add New, search “Fast2SMS”, install and activate. Paste your Fast2SMS API key on the Dashboard tab. WooCommerce features switch on by themselves.<\/li>\n
    2. Get a marketing template approved.<\/strong> A WhatsApp marketing template approved by Meta, a Promotional DLT SMS template, or both.<\/li>\n
    3. Switch on Back in stock.<\/strong> In the Automations tab, turn on the Back in stock card, choose SMS, WhatsApp or both, and pick your template from the searchable picker.<\/li>\n
    4. Map the variables.<\/strong> Fill each template slot from the variable dropdown on the card. Use the values it offers for this event. The live phone preview shows the final message.<\/li>\n
    5. Send a test.<\/strong> Press Send test. You get the real message on your phone and a request_id for support if anything looks off.<\/li>\n
    6. Add admin alerts.<\/strong> Add your team’s numbers in Settings, then switch on the Low stock and Out of stock cards.<\/li>\n<\/ol>\n
      \"WooCommerce
      The Automations tab: turn on the Back in stock card, pick a channel and template, map variables and send a test.<\/figcaption><\/figure>\n

      Admin low stock and out of stock alerts in WooCommerce<\/h2>\n

      The back in stock notifier helps you win back shoppers. Admin stock alerts help you avoid losing them in the first place. With the Low stock alert, you hear about a product running low while there is still time to reorder. With the Out of stock alert, you know the moment it sells out.<\/p>\n