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Best free Stock alerts Shopify apps in 2027 [Updated]
PickYourApp Review Team
6 min read
•
Aug 30, 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 |
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#1. 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. -
#2. 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. -
#3. Smart inventory management with real-time alerts, automation, & analytics for zero stock-out issues.
Out Of Stock Alert Restock Lab helps you manage inventory with smart automation and real-time alerts. Get instant notifications via email, Slack, or WhatsApp when stock levels drop, so you can avoid lost sales from out-of-stock issues. The app lets you set up automated alerts for specific products, variants, collections, vendors, tags, and SKUs. You can configure stock thresholds for multiple locations and send alerts to multiple recipients. Advanced sales forecasting and analytics help you calculate reorder quantities accurately. The system provides detailed inventory reports with scheduled CSV and PDF exports, making inventory control simple and efficient. Filter alerts with bulk upload options and customize everything to match your workflow. -
#4. 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. -
#5. Capture revenue, predict demand with preorder & automated restock alerts
TA Preorder & Back In Stock helps you recover lost sales from out-of-stock products and capture revenue from upcoming launches. Set up preorder, backorder, and presale campaigns with full or partial payment options. Send automated back in stock alerts to customers waiting for restocked items. Add customizable preorder or notify me widgets to your products and collections with seamless theme integration. The app auto-translates its interface and lets you manually customize storefront text for each language. Track demand and forecast inventory using built-in analytics to measure revenue performance and make smarter stocking decisions. -
#6. Keep selling when products run out or before they launch, with preorders and back-in-stock alerts.
Keep selling when products are out of stock or before they launch with preorder and back-in-stock features. The preorder button automatically replaces 'Sold Out' so you never lose a sale. Choose flexible payment options: charge full payment upfront or collect a deposit (percentage or fixed amount) and automatically collect the balance later. Add delivery dates, product badges, and 'only X left' urgency bars to build customer trust. Set per-product or campaign caps with cart-aware protection to prevent overselling. For sold-out items you're not preselling, capture customer emails and automatically send back-in-stock alerts when you restock. Launch preorder campaigns in minutes for unreleased or out-of-stock products and keep revenue flowing. -
#7. Add back in stock that helps you boost sales and save time — built for your store. Set up in minute
Notify Me, Back in Stock helps you manage restock alerts and price drop notifications in one place. Set up takes just minutes with zero busywork. Send automatic back in stock alerts to customers via email or SMS when products are restocked. The out-of-stock waitlist shows you which items are most in demand, so you know what to restock first. Price drop notifications instantly alert shoppers when products go on sale. Customer signups auto-sync to your mailing list for future marketing. Customize the notify me button and email templates to match your store's look. Works seamlessly with stock alerts and remind me features. Save hours every week while growing sales with automated restock alert notifications. -
#8. 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. -
#9. Display stock level, low stock counter, left stock & countdown alerts to drive urgency and scarcity.
The Low Stock Counter app helps increase store conversions by creating urgency and scarcity on your product pages. It automatically displays real-time inventory alerts showing remaining stock, limited stock, and low stock messages to encourage customers to buy before items sell out. Display stock level alerts directly on collection and product pages with fully customizable fonts, colors, and styles that match your store. The stock counter automatically updates when customers select different product variants, ensuring accurate inventory information. Apply the counter to all products, selected items, or specific collections. Show various stock messages including low stock alerts, full stock, last stock, limited stock, and out of stock notifications. This countdown feature creates a sense of urgency while improving the shopping experience and driving more sales. -
#10. 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.
