Stockouts kill momentum. One minute a customer’s ready to buy, the next they see “Out of stock” and poof-they’re gone (probably to a competitor). The smartest Shopify brands don’t just hope those visitors come back on their own. They trigger instant “back in stock” alerts the moment new inventory lands. The result? Higher conversion rates, happier,000s in recovered revenue, and customers who feel taken care of instead of ghosted.Below are the top platforms crushing it right now-battle-tested, fast to set up, and built to turn “out of stock” into “just sold again.”
How Extuitive Actually Works (No Fluff Version)
We built Extuitive because watching small teams spend weeks (and a lot of cash) on consumer research that still missed the mark felt wrong. The idea was simple: what if an AI system could act like a massive, always-available focus group that actually behaves like real people? So we trained a whole ecosystem of consumer agents on actual behavioral data - shopping habits, scroll patterns, everything - and let them loose on product ideas and ad concepts before a single dollar gets spent on real ads.
The way it works day-to-day is pretty straightforward. You connect your Shopify store, tell us what you’re thinking about launching or advertising, and our agents get to work. They spin up dozens of variations - copy, visuals, pricing, reels - then pressure-test everything against each other and against what’s moving in the market right now. What comes out the other end is a shortlist of the stuff that consistently wins with the personas that match your actual customers. No more hoping the creative team nailed it on the first try.
1. Preorder, Back In Stock ‑ STOQ
Shop owners often face the headache of items flying off shelves faster than restocks arrive, leaving potential buyers hanging. This platform steps in by letting users slap a simple preorder or notify-me widget right onto those empty product spots, turning frustration into a chance to lock in sales ahead of time. Deposits or split payments keep things rolling without full upfront hits, and when fresh stock lands, emails or texts zip out automatically to the folks on the waitlist. Customization runs deep here, from tweaking button looks to syncing up with email tools, all backed by round-the-clock chat help that feels more like a quick fix than a hassle.
What stands out is how it folds in extras like handling orders across different spots or markets without much fuss, plus pulling in analytics to spot patterns in demand. Waitlist reminders nudge people back if they forget, and it plays nice with business-to-business setups, keeping catalogs separate where needed. Overall, the setup feels straightforward for stores juggling multiple angles, avoiding the usual tangle of add-ons that complicate everything.
Key Highlights
- Round-the-clock live chat support for tweaks and issues
- Syncs mailing lists with Klaviyo for smoother flows
- Handles multiple store locations and markets
- Includes analytics and reminder alerts for waitlists
- Free plan covers basics like widgets and auto-alerts, with paid options unlocking more capacity and no branding, plus a free trial period
Services
- Adds preorder or notify-me buttons to out-of-stock items
- Sends automatic email or SMS restock notifications
- Sets up presales, back orders, and partial payment options
- Supports business-to-business preorders
- Customizes buttons and alerts to fit store branding
Contact Information
- Website: www.stoqapp.com
- Email: support@stoqapp.com
- Address: 1111B S Governors Ave STE 3617, Dover, DE, 19904, US
- LinkedIn: www.linkedin.com/showcase/stoq-by-artos-software
- Twitter: x.com/stoqapp
- Shopify App Store: apps.shopify.com/back-in-stock-restock-alerts
2. Notify! Back in Stock|PreOrder
Running low on hot items can sneak up and scatter your traffic, but this tool catches those moments by dropping notify-me, preorder, or wishlist buttons across product pages, home screens, and collections. Alerts fire off through email, SMS, or push once things are back, while preorders let direct-to-consumer or business buyers snag spots with discounts, notes, or easy payments. A low-stock ticker adds that subtle urgency without overdoing it, and wishlists give even guest browsers a way to stash favorites for later, pulling them back in when timing's right.
Digging deeper, the wishlist works without logins, which keeps things frictionless for casual surfers, and low-stock forecasts help plan ahead instead of reacting in panic. Support comes through chat, phone, or email, making it easier to iron out workflow kinks with other apps. Multilingual bits cover a decent spread, and resend options ensure no alert slips the net, giving stores a reliable nudge system that doesn't demand constant babysitting.
Key Highlights
- Guest wishlist saves without needing accounts
- Low-stock widgets and forecasting tools included
- Dedicated support via chat, phone, or email
- Integrates with page builders for custom layouts
- Free lite plan handles core notifications and preorders, with paid tiers adding unlimited actions and branded emails, plus a free trial window
Services
- Places notify-me, preorder, or wishlist buttons on pages
- Delivers auto restock alerts by email, SMS, or push
- Accepts preorders with partial payments or discounts
- Tracks low stock with counters and alerts
- Manages wishlists for item saving and recovery
Contact Information
- Website: notify-me.io
- Phone: +1 604-373-9085
- Email: support@notify-me.io
- LinkedIn: www.linkedin.com/company/notify-me
- Facebook: www.facebook.com/notifyme.io
- Twitter: x.com/notifyme_io
- Shopify App Store: apps.shopify.com/preorder-back-in-stock
3. AMP Back in Stock | PreOrder
Sold-out signs hit hard in fast-paced shops, yet this app flips them into opportunity by swapping bland messages for tailored notify-me or preorder buttons that blend seamlessly across devices and tongues. Shoppers get pings via email, SMS, or push the instant restocks happen, and preorders open doors to sell ahead with full or split payments, easing cash crunches before inventory even shows. No coding required to get buttons live, and it scales for big catalogs without buckling under the weight.
A nice touch lies in the demand tracking that spills insights for smarter stocking choices, paired with email sends from your own domain to keep things personal. Zapier hooks let it chain into broader automations, and support's always on tap around the clock. English covers the base, but multi-language support broadens reach quietly, making it a solid pick for stores eyeing steady recovery without flashy overhauls.
Key Highlights
- Tracks demand patterns for inventory guidance
- Connects via Zapier and API for extended workflows
- Sends emails from custom domains
- Handles high volumes of stock-keeping units
- Free tier includes basic notifications and analytics, with paid plans expanding to unlimited preorders and integrations like Klaviyo, plus a free trial stretch
Services
- Deploys customizable notify-me and preorder buttons
- Issues instant restock notifications by email, SMS, or push
- Enables pre-sales with partial or full payments
- Provides analytics and reports on sign-ups
- Integrates with tools like Shopify Flow and MailChimp
Contact Information
- Website: useamp.com
- Address: 90 Eu Tong Sen Street, #03-02, Singapore, 059811, SG
- LinkedIn: www.linkedin.com/company/use-amp
- Shopify App Store: apps.shopify.com/back-in-stock
4. In Stock Reminder - Restock Alerts
Shoppers who run into out-of-stock items can click a small badge that brings up a simple form, and the app takes care of the rest. It watches inventory levels all day and fires off emails, SMS, or even Meta Messenger messages the moment something comes back. The badge and pop-up match whatever look the store already has, and the message templates switch languages when needed. Customers can even say how long they’re willing to wait, which gives the store a rough idea of real interest.
Another handy part is the one-click CSV import for older requests, so nothing gets lost when switching tools. Everything stays in English only, but the design tweaks are deep enough that most stores won’t feel limited by that. Setup is straightforward inside Shopify, and the focus stays on automatic delivery without constant checking.
Key Highlights
- Sends alerts through email, SMS, or Meta Messenger
- Fully editable badge and pop-up design
- Customers can set how long they’re willing to wait
- One-click CSV import for existing data
- Free plan covers all core features with no mention of paid upgrades
Services
- Places notify-me badge on out-of-stock products
- Automatically sends restock notifications
- Customizes badge, pop-up, and message templates
- Supports multiple languages in notification templates
- Imports previous requests via CSV
Contact Information
- Website: spur-i-t.com
- Phone: +1 (888) 409-2976
- Email: contact@spur-i-t.com
- Address: 19709, Middletown, DE 651 North Broad Street, Suite 201
- LinkedIn: www.linkedin.com/company/spurit
- Facebook: www.facebook.com/SpurIT.company
- Twitter: x.com/spur_it
- Instagram: www.instagram.com/spurit.company
- Shopify App Store: apps.shopify.com/in-stock-reminder
5. SC Back in Stock Restock Alert
A clean notify-me button shows up wherever stock runs dry, letting visitors join waitlists without fuss. When inventory updates, the app pushes out email and SMS alerts on its own. It also handles price-drop alerts and low-stock warnings, so the same system covers several shopper triggers at once. Templates for messages can be changed to fit the store’s voice, and the collected emails become easy to retarget later.
The app keeps track of both regular and business customer requests separately, which helps stores plan restocks or marketing pushes. Everything runs in the background, and the main job is turning interest into sales once items return.
Key Highlights
- Covers back-in-stock, preorder, low-stock, and price-drop alerts
- Separates regular and business customer requests
- Custom message templates for branding
- Real-time automatic notifications
- Free plan available with basic functions
Services
- Adds notify-me widgets for out-of-stock items
- Sends automated email and SMS restock alerts
- Supports price-drop and low-stock notifications
- Tracks demand from different customer types
- Allows retargeting of waitlist subscribers
Contact Information
- Website: shopcircle.co
- Address: One Kingdom Street, Paddington Central, London, ENG, W2 6BD, GB
- LinkedIn: www.linkedin.com/company/shop-circle
- Facebook: www.facebook.com/shopcircleapps
- Instagram: www.instagram.com/shopcircleco
- Shopify App Store: apps.shopify.com/out-of-stock-1
6. Alert Me! Restock Alerts
Forms appear on product and collection pages so shoppers can sign up for as many items as they want. The moment stock lands, alerts go out instantly without anyone lifting a finger. Colors and text on the forms adjust to the store’s theme in a few clicks. Analytics show which sold-out items get the most requests, giving a quick view of what to bring back first.
Multi-location stores stay covered, and the whole thing stays hands-off after the initial setup. English is the only language, but the simplicity keeps most users from needing more.
Key Highlights
- Completely automatic after setup
- Instant alert delivery on restock
- Analytics for most-requested items
- Multi-location inventory support
- Free plan allows unlimited sign-ups and up to ten monthly notifications, with paid plans raising notification limits and a free trial period
Services
- Places sign-up forms on product and collection pages
- Sends real-time back-in-stock alerts
- Customizes form colors and text
- Tracks demand through built-in analytics
- Works across multiple store locations
Contact Information
- Website: www.dibbledevelopment.com
- Address: Watkinsville, GA, 30677, US
- Shopify App Store: apps.shopify.com/alert-me-restock-alerts
7. Appikon Back in Stock Alerts
A lightweight form pops up for out-of-stock products, and customers get email or SMS the second items return. Setup takes just a minute or two, no coding involved, and every part of the form and messages can be reshaped to match the store. Analytics break down which items pull the longest waitlists, helping decide what to reorder. Waitlists build up automatically, and reminders can nudge people who signed up earlier.
Integrations with Klaviyo, Mailchimp, and Pushowl keep the contacts flowing into existing flows. Zapier hooks open extra automation options. English covers everything, but the customization depth makes it fit most stores anyway.
Key Highlights
- Quick setup with no coding needed
- Full design control over forms and notifications
- Demand analytics and reporting
- Reminder messages for older sign-ups
Services
- Shows customizable sign-up forms on out-of-stock items
- Sends automatic email and SMS restock alerts
- Builds and manages product waitlists
- Provides analytics on customer demand
- Connects to Klaviyo, Mailchimp, Pushowl, and Zapier
Contact Information
- Website: www.appikon.com
- LinkedIn: www.linkedin.com/company/apphub-llc
- Shopify App Store: apps.shopify.com/customer-back-in-stock-alert-user-notification-app
8. Cartbite ‑ Restock Alerts
Out-of-stock pages don’t have to stay dead ends with this one. A small “Notify Me” button appears automatically, customers leave their email or phone, and the app handles the rest when new stock arrives. It also watches for price drops and sends those alerts too, so the same tool covers a couple of common shopper wishes. Waitlists build up in the background, giving a clear picture of which items people actually want back. Everything syncs straight into the regular customer list, making later email campaigns simpler.
The button and all messages can be reshaped to fit the store’s look without touching code. English is the only language, but the customization options are solid enough that most stores won’t feel stuck. Setup is quick, and the focus stays on grabbing sales that would otherwise walk away.
Key Highlights
- Handles restock and price-drop alerts in one place
- Builds out-of-stock waitlists for demand tracking
- Syncs subscribers directly to Shopify customer list
- Full control over button and message design
- Free plan covers core alert functions, paid plans add higher limits and remove branding
Services
- Shows notify-me button on out-of-stock products
- Sends automatic restock and price-drop alerts via email or SMS
- Creates waitlists and tracks in-demand items
- Customizes button style and notification templates
- Integrates with Pagefly and Shopgun
Contact Information
- Website: grow.staqlab.com
- Address: plot no-84,gali no-8, ambika enclave, kakrola, New Delhi, DL, 110059, IN
- Shopify App Store: apps.shopify.com/cartbite
9. ES AI Back in Stock Notify Me
This app leans on AI to decide when and how many alerts to send once stock returns, trying to hit the sweet spot for conversions. A plain “EMAIL ME” button appears on product and collection pages for out-of-stock items, and the popup works with Online Store 2.0 themes. Merchants edit the email templates right inside the block editor, no extra tools needed. Multiple language templates are available even though the interface stays in English.
Live chat support runs around the clock, which helps smaller stores get unstuck fast. Klaviyo and Mailchimp connections keep the contacts flowing into existing flows.
Key Highlights
- AI decides timing and volume of restock alerts
- Button and popup built for Online Store 2.0
- Email templates editable in the block section
- Multiple language options for messages
- Free plan includes basic alerts, paid plans unlock higher volumes and advanced features
Services
- Places email-me button on out-of-stock items
- Sends AI-timed restock alerts by email or SMS
- Allows direct template editing in Shopify
- Supports multiple languages in notifications
- Connects to Mailchimp and Klaviyo
Contact Information
- Website: www.channelwill.com
- Address: 600 N.Rosemead Blvd #115, Pasadena, CA, 91107, US
- LinkedIn: www.linkedin.com/company/channelwill
- Twitter: x.com/ChannelWillTeam
- Shopify App Store: apps.shopify.com/email-1
10. Pre-Order Pro
Stores that sell before stock arrives or just want solid restock alerts find a straightforward mix here. Out-of-stock items can switch to a pre-order button with optional partial payments or automatic discounts. A separate notify-me button handles pure restock requests, and alerts go out the moment inventory updates. Delivery notes like expected dates can sit right under the button, and orders get tagged automatically for easier fulfillment later.
Language support covers English plus a handful of European and Japanese options. Connections to most major email providers keep everything in one place.
Key Highlights
- Combines pre-order and restock functions
- Supports partial payments and scheduled pre-orders
- Automatic order tagging for pre-orders
- Delivery date notes under the button
- Free plan covers basic pre-order and alert setup, paid plans add advanced tagging and integrations
Services
- Enables pre-order button with discounts or partial payments
- Shows notify-me button for pure restock alerts
- Sends automatic back-in-stock notifications
- Adds custom delivery notes to product pages
- Works with Mailchimp, Klaviyo, Omnisend, and others
Contact Information
- Website: globo.io
- Email: contact@globosoftware.net
- Address: 45C, 210 Hoang Quoc Viet Street, Ha Noi
- LinkedIn: www.linkedin.com/company/globo-software-solution-jsc
- Facebook: www.facebook.com/globosoftware
- Twitter: x.com/ContactGlobo
- Shopify App Store: apps.shopify.com/pre-order-pro
11. Back in Stock by Zooomy
A simple, no-frills option that does exactly what the name says. Customers click a notify-me button on sold-out products or variants, leave their email, and get a message when things are available again. The button text, colors, and background change in a few clicks to match the store. Alerts can fire automatically or be sent manually if preferred. Subscribers land in the regular Shopify customer list for later marketing.
It works with almost any theme and handles variants without issues. Live chat and email support answer questions fast.
Key Highlights
- Supports product variants fully
- Automatic or manual alert sending
- Button styling matches store design
- Subscribers sync to Shopify customers
Services
- Adds customizable notify-me button to products and collections
- Sends restock alerts by email
- Handles individual product variants
- Customizes button appearance and email templates
- Integrates with Klaviyo and Checkout
Contact Information
- Website: zooomyapps.com
- Address: 6110 pelican Ln, columbus, IN, 47201, US
- Shopify App Store: apps.shopify.com/back-in-stock-zooomy
12. Ordersify Product Alerts
Low stock or completely empty items get a little bar or badge so customers see what’s running out. At the same time, shoppers can leave their email for restock news, and the app sends those updates automatically. Merchants also receive daily or instant reports about low-stock situations across warehouses. Multiple locations stay covered without extra setup.
Messages come from the store’s own domain, and language support stretches across several common ones. The free version keeps the core alert flow running, while paid tiers open badges and bigger notification volumes.
Key Highlights
- Low-stock and out-of-stock badges on product pages
- Automated low-stock reports to merchants
- Supports multiple warehouse locations
- Sends alerts from store domain
Services
- Shows low-stock bars and status badges
- Sends customer restock notifications
- Delivers low-stock and out-of-stock reports
- Handles multiple store locations
- Integrates with Mailchimp, Klaviyo, PushOwl
Contact Information
- Website: ordersify.com
- Email: support@ordersify.com
- Address: 217 Tran Phu street, Ha Dong District, Hanoi, 100000, VN
- Facebook: www.facebook.com/ordersify
- Twitter: x.com/ordersify
- Instagram: www.instagram.com/ordersify
- Shopify App Store: apps.shopify.com/ordersify-product-alerts
13. Watchlist
Setting up takes a few minutes, then a notify-me button appears wherever stock runs dry. Restock alerts go out automatically by email or SMS through whatever platform the store already uses. Preorder lists can be built the same way, and AI suggestions pop up to nudge visitors toward items that are actually in stock. Analytics track which sold-out products get the most attention.
Coming-soon alerts and batch sending options give extra control. The app speaks whatever language the theme does and ties into most major email and SMS providers.
Key Highlights
- Preorder and restock lists in one place
- AI-powered in-stock recommendations
- Batch alert sending and reminders
- Works with almost any email or SMS provider
- Pricing starts with a free plan for basic alerts, paid plans unlock advanced features and higher volumes
Services
- Adds notify-me button for restock and preorder
- Sends automatic alerts via chosen ESP or SMS tool
- Shows AI-based alternative product suggestions
- Tracks popular out-of-stock items
- Supports coming-soon alerts and multiple locations
Contact Information
- Website: www.getswym.com
- LinkedIn: www.linkedin.com/company/swym-corporation
- Facebook: www.facebook.com/swymit
- Twitter: x.com/swymit
- Shopify App Store: apps.shopify.com/watchlist
14. OnVoard Back in Stock
EU-based servers keep everything GDPR-friendly with double opt-in as standard. Customers pick from a few different button or form styles to leave their email when something’s gone. Alerts fire off automatically once inventory updates. An inventory dashboard lists how many people wait for each product, and tags control exactly which items show the subscription option.
Subscribers sync to Shopify and popular marketing tools. One paid plan covers everything without hidden limits, just an extra fee per thousand emails sent.
Key Highlights
- Data and servers hosted in the EU
- Double opt-in for GDPR compliance
- Inventory dashboard with subscriber counts
- Tag-based control over which products show alerts
Services
- Offers multiple button and form trigger styles
- Sends automatic restock notifications
- Syncs subscribers to Shopify and marketing platforms
- Provides dashboard for waitlist overview
- Works with Mailchimp, Omnisend, Klaviyo
Contact Information
- Website: www.onvoard.com
- Email: support@onvoard.com
- LinkedIn: www.linkedin.com/company/onvoard
- Facebook: www.facebook.com/onvoard
- Twitter: x.com/onvoard
- Shopify App Store: apps.shopify.com/onvoard-back-in-stock
15. Groot Back In Stock Alerts
A small notify-me widget drops onto any out-of-stock product without touching code, and shoppers leave their details right there. The moment inventory updates, the app fires off restock notices through email, SMS, or even WhatsApp. Everything from the button color to the message wording can be changed to fit the store’s look, and the same setup works across different languages if the store needs it. Subscribers also flow straight into Klaviyo lists, so follow-up campaigns stay easy to run.
Demand tracking sits in a simple dashboard that shows which items people wait for most and how many sales actually come back after an alert. Setup stays light, and the focus lands on getting customers back to the cart fast instead of making them hunt for updates themselves.
Key Highlights
- Sends alerts via email, SMS, and WhatsApp
- Full design control over button and messages
- Direct sync with Klaviyo segments
- Built-in demand and performance dashboard
- Free plan covers core alert functions, paid plans remove limits and branding
Services
- Adds customizable notify-me widget to product pages
- Delivers automatic restock notifications
- Supports multiple languages in templates
- Tracks waitlist demand and recovered sales
- Integrates with Checkout and Klaviyo
Contact Information
- Website: crawlapps.com
- Phone: +91 9998579402
- Email: hello@crawlapps.com
- Address: 2118 Thornridge cir. syracuse, connecticut 35624
- LinkedIn: www.linkedin.com/company/crawlapps
- Facebook: www.facebook.com/crawlapps
- Twitter: x.com/crawlapps
- Instagram: www.instagram.com/crawlapps_
- Shopify App Store: apps.shopify.com/grootapps-back-in-stock
Conclusion
Stockouts happen to every Shopify store at some point, and pretending otherwise is just silly. The difference between losing that sale forever and turning it into revenue a few days later usually comes down to one tiny thing: giving the customer an easy way to say “hey, tell me when it’s back.” The apps out there now make that dead simple, some with fancy extras like preorders or low-stock nudges, others just quietly sending the email and getting out of the way.
At the end of the day, pick the one that fits how your store actually runs. If you’re juggling multiple locations or want everything in one place with price-drop alerts too, go that route. If you just need the basics without another monthly bill, plenty of solid free versions exist. Test a couple, see which button style your customers actually click, and watch the abandoned “out of stock” carts start coming back on their own. That’s it-no magic, just a little automation doing the heavy lifting so you don’t have to chase people down manually.
