News
Shopify SEO
Shopify development
Best free Stock alerts Shopify apps in 2026 [Updated]
PickYourApp Review Team
6 min read
•
May 20, 2026
The Best Free Shopify stock alert apps help merchants manage inventory effectively while engaging customers. From low stock counters and product labels to back-in-stock notifications and preorder systems, these tools automatically track inventory levels, notify customers when items are restocked, and create urgency through stock-level displays. Whether you need waitlist management, automated restock alerts, or inventory forecasting, these free solutions keep both merchants and customers informed while preventing lost sales opportunities.
| Name | Rate on Shopify | Price | Free trial | Key features |
|---|
-
#1. Sell preorders & backorders with full/partial payments. Auto send back-in-stock & coming soon alerts
REZ helps you sell preorders and backorders for out-of-stock products so you never miss a sale. Accept pre-order and presale orders with full or partial payments and deposits to generate revenue early. Set up automated back-in-stock alerts and coming soon notifications to keep customers informed when products are restocked. The Notify Me feature lets shoppers join waitlists and request interest in unavailable items. Track demand and forecast inventory with built-in conversion analytics. Manage preorders easily in Shopify with deposit options and discounts to encourage sales. Quick 24/7 support helps you get started in minutes. Install REZ today to capture every sales opportunity. -
#2. Increase conversions with Preorders, Partial Payments, Back in Stock.
PreOrder Bat helps you manage pre-orders and product availability on your Shopify store. Accept preorders for new launches, out-of-stock items, or products you're testing for demand. Capture customer interest early and drive sales before items are available. The app supports partial payments, letting customers reserve products with a deposit and pay the balance later. Send Back in Stock and Notify Me alerts with Klaviyo sync to recover missed sales. Use countdown timers and low-stock counters to create urgency. Built for both B2B preorders and retail, with support for multiple locations and split shipping for separate fulfilments. Manage Coming Soon products and wishlist features with essential customisation options. Get 24/7 support via live chat, email, phone, and video call. -
#3. Trigger FOMO & urgency with social proof, visitor counter, sales popup, low stock counter & review
Create authentic social proof and urgency with FOMO Sales Pop Up. Display real-time visitor counters, sales notifications, and product reviews to build instant trust with your store visitors. The app shows live purchase alerts, low stock counters, and inventory notifications that naturally encourage buying decisions. Keep shoppers engaged with discount gamification and countdown timers, while cart abandonment alerts help recover lost sales. Monitor your store's performance through real-time analytics. From social proof to FOMO triggers, this app helps turn your store traffic into actual customers. -
#4. Automated, personalized back in stock alerts that re-engage customers and recover lost sales
XFlow Back in Stock Alert sends automated, personalized back in stock alerts when products restock. Target customers by product, collection, or customer segment with tailored email notifications based on their behavior and purchase history. Create reusable workflows and email templates to automate restock alerts across multiple campaigns simultaneously. Track campaign performance, monitor subscriber demand, and recover lost sales from stockouts. Get internal notifications when customers subscribe or show restock demand. Optimize conversion rates with detailed analytics. Includes 24/7 live chat support to help you set up and manage your back in stock email campaigns. -
#5. Notify customers when products are back in stock and manage an out-of-stock waitlist.
Never miss a sale due to out-of-stock items with this essential Back in Stock notification app. When products are unavailable, customers can join a waitlist directly from your product pages and receive automatic alerts once items are restocked. The app manages your out-of-stock waitlist efficiently while letting you export customer emails for marketing purposes. Customize the notification pop-up form to match your store's branding and integrate seamlessly across home, product, and collection pages. With easy installation and theme compatibility, you can start recovering potentially lost sales and keeping customers engaged. The app includes 24/7 support to help you maximize its features and maintain smooth operation. -
#6. Notify customers by restock alert when items are back in stock & create an out-of-stock waitlist.
Never miss a sale with Back In Stock! Alert Engine, a complete solution for managing out-of-stock products. When items are unavailable, customers can click the customizable "Notify Me" button to join your waitlist. The app automatically sends restock alerts via email once products return to inventory. Track customer demand through detailed waitlist analytics and expand your mailing list naturally. Beyond restock notifications, the app handles price drop alerts, low stock warnings, and abandoned cart follow-ups. Works seamlessly with popular email platforms like Klaviyo and supports multiple languages. The user-friendly setup takes minutes, fits most Shopify themes, and includes 24/7 customer support to help you maximize recovery of lost sales opportunities. -
#7. Stop losing sales. Launch pre-order campaigns with delivery dates and full payment upfront.
This app lets you continue selling products even when inventory runs out by launching pre-order campaigns with custom delivery dates. Create backorder campaigns easily by selecting products and setting expected shipping dates that display on your storefront to build customer trust. The full payment model captures the entire order value at checkout, securing your cash flow upfront. Perfect for managing product restocks and new launches. The storefront widget automatically replaces "Sold Out" buttons with pre-order options, so you never lose sales. Manage multiple pre-order campaigns simultaneously for different products or launches. -
#8. Urgency Product Badges, stock labels. Add urgency and FOMO by showing scarcity on product badges
Create a sense of urgency and drive more sales with Urgency Product Badges that display real-time inventory levels on your store. Show compelling product labels like "Only 2 left in Stock" or "Selling Quickly" to tap into customers' FOMO (Fear of Missing Out). Customize your badges with eye-catching emojis and engaging titles that highlight scarcity. These attention-grabbing stock labels can be placed throughout your store pages, helping customers make faster purchase decisions. Whether you want to showcase limited availability or high demand, these product badges help build excitement and encourage shoppers to act quickly before items sell out. -
#9. Stock Meter transforms how you showcase product availability in your store
Stock Meter shows real-time product availability directly on your Shopify store pages, helping create urgency and build customer trust. The app displays live stock counts to let shoppers know exactly how many items remain, while also showing total units sold to demonstrate product popularity. By making inventory levels visible and transparent, Stock Meter encourages quicker purchase decisions. It's particularly useful for flash sales and limited-stock items where showing accurate availability matters most. The simple yet effective features help your store communicate stock status clearly while highlighting product demand. -
#10. Preorder & Presale Manager: Back In Stock Alerts, Notify Me Restock Emails & Partial Payments.
This app helps you capture sales even when products are out of stock. Replace "Sold Out" buttons with Pre Order Now options to keep revenue flowing. Run presale campaigns for coming-soon items and offer flexible partial payments or deposits to customers. Set up Back In Stock alerts through Notify Me widgets to automatically send restock emails when inventory returns. Manage preorder limits, shipping dates, and waitlists with ease. Customize Pre Order buttons across product pages, collections, and quick buy sections. Configure preorder start and end dates, quantity limits, and shipping estimates. Perfect for handling backorders and pre-selling products before they're available. Capture more leads and never miss a sale opportunity again.
