The 9 Best Back in Stock Apps for Shopify [2026]
![The 9 Best Back in Stock Apps for Shopify [2026]](/assets/blog/best-shopify-back-in-stock-apps/banner.avif)
Every time a shopper lands on a sold-out size, you lose the sale, and every time they buy it somewhere else instead, you lose the customer. A back in stock app puts a Notify me form on the sold-out variant and alerts the shopper when it returns, and it works since the shopper has already chosen the product.
Hundreds of Shopify apps offer one, and they share the same core features: a notify-me button, automatic restock emails, SMS alerts, waitlist reports and preorders. What separates them is how those features are split across plans, and how the price scales as your alerts grow.
We ranked the 9 best back in stock apps for Shopify by which plan includes each feature and what that plan costs at your monthly alert volume.
Why Back in Stock Alerts Matter for Shopify Stores
We looked at 30 days of data from the Vitals Back in Stock App, which is installed on 33,645 Shopify stores. Across the 1,827 stores that showed it between August 27 and September 26, 2026:
- Shoppers saw the notify-me form 41,072,474 times on sold-out variants
- Shoppers clicked it 112,229 times, about once every 366 views
- 64% of those clicks turned into a waitlist signup, for 71,721 signups in total
- Stores sent 31,305 restock alerts, and 347 orders worth $40,416 followed, roughly 1 order for every 90 alerts
- The average store collected about 39 signups and sent about 17 restock alerts a month
Install: Vitals Back in Stock App
What to Look for in a Restock Alert App
Every back in stock app alerts shoppers when a sold-out product returns, so the details decide how well it works on your store. Check for these eight things:
- A notify-me button on sold-out variants catches shoppers at the moment they would leave.
- SMS alerts reach shoppers who miss or ignore email.
- Reminder emails follow up with shoppers who didn't buy after the first alert.
- Batch sending spaces alerts across the waitlist, so a small restock doesn't sell out in minutes.
- Preorders let shoppers pay now for stock that hasn't arrived yet.
- Email platform sync sends waitlist signups to Klaviyo or your mailing list.
- Multi-location support triggers alerts from the location that actually restocked.
- Waitlist reports show the most requested products, so you know what to reorder first.
Then check the plan limits. Some free plans cap alerts at 10 or 30 a month, and paid plans price by alerts sent, so what you pay depends on your waitlist size as much as on the features.
Read: The 7 Best Wishlist Apps for Shopify Stores in 2026
The 9 Best Shopify Back in Stock Apps in 2026
Here's how the nine apps compare on rating and price.
1. Vitals
Best for: Shopify stores that want a back in stock app plus 40+ conversion apps in a single install
Rating: 4.9 (2,951 reviews) | Price: From $29.99/mo | Free trial: 7 days
Vitals is one of the most widely used back in stock apps on Shopify, installed on 33,645 stores. It adds a Notify me form to sold-out variants and emails or texts each shopper when the variant is back.
The alert goes out on its own when inventory returns, and an optional reminder follows one to five days later. It pairs with Wishlist to save items for later, Pop-ups to grow the list, and Email Marketing to follow up on the same plan.
Vitals is also the only all-in-one app that offers back in stock alerts plus 40+ conversion apps (product reviews, bundles, pop-ups, sticky add to cart) in a single $29.99/mo subscription.
Key Features
- Notify me form on sold-out variants
- Restock alerts by email or SMS (20 SMS a month included, then priced by country)
- 10,000 restock alerts a month on the plan
- Optional signup confirmation email (sent while the shopper is still on the page)
- Optional reminder email (one to five days after the alert)
- Editable templates for the alert, confirmation and reminder emails
- Products and collections excluded from the form
- Orders and sales tracked for each email (alert, reminder, confirmation)
- Runs from the same single Vitals script as every other app
Pros
- Back in Stock, Pop-ups and Wishlist on one plan (e.g., FreeShippingAllOrders.com has collected 637 restock alerts on sold-out fragrances, and runs Back In Stock alongside Pop-ups, Wishlist and Push Marketing among its Vitals apps)
- 10,000 restock alerts a month with no alert tiers
- 71,721 waitlist signups across 1,145 stores in the last 30 days
- Built for Shopify, with a 4.9 rating from 2,951 reviews
- Waitlist results in Claude and ChatGPT through Vitals MCP
Cons
- No free plan, with every app at $29.99/month
- Usage fees start after ~$1,000/month in Vitals-attributed sales
- SMS alerts past 20 a month are charged by country
- No web push or WhatsApp channel
Pricing
Read: The 7 Best Email Marketing Apps for Shopify in 2026
2. Globo
Best for: Preorders and restock emails on a low-cost plan
Rating: 4.9 (1,931 reviews) | Price: $0–19.90/mo | Free trial: 7 days
PreOrder Globo | Back in Stock pairs restock alerts with a preorder tool that takes partial payments and discounts. It's designed for stores that sell preorders and want restock emails on the same low-cost plan.
Key Features
- Preorder button on sold-out products or any product
- Preorders by inventory level or by start and end date
- Partial payment and automatic discount on preorders
- Custom delivery note under the preorder button
- Notify me button on sold-out products
- Automatic restock alerts to subscribers
- Order tags for preorders and shipping dates
- Batched restock alerts, Shopify Markets and CSV import and export on paid plans
Pros
- Free plan with the first 100 restock emails and 20 presale orders
- Built for Shopify, with a 4.9 rating from 1,931 reviews
- Unlimited presale orders on Pro at $19.90/month
- Yearly billing saves 17%
Cons
- Free plan covers the first 100 restock emails only
- Email template editing and batched alerts start at $9.90/month
- 5,000 restock emails a month is the top cap, on Pro at $19.90/month
- No SMS channel listed
Pricing
3. STOQ
Best for: Preorders with deposits and unlimited alerts at scale
Rating: 5.0 (3,738 reviews) | Price: $0–69/mo | Free trial: 14 days
Preorder, Back In Stock ‑ STOQ adds a Notify me or Preorder widget to sold-out products and alerts shoppers by email or SMS. It's designed for stores that take deposits on preorders and want unlimited alerts as volume grows.
Key Features
- Notify me and Preorder widgets on sold-out products
- Automatic back in stock alerts by email or SMS
- Preorders, presales and backorders with deposits or partial payment
- B2B preorders
- Klaviyo mailing list sync
- Multiple locations and Shopify Markets
- Reminder alerts and analytics
- 24/7 live chat support on every plan
Pros
- 5.0 rating from 3,738 reviews
- Free plan with unlimited registrations and automatic restock alerts
- Unlimited email and SMS alerts on the Unlimited plan
- Built for Shopify
Cons
- Free plan includes 30 emails a month
- Branding removal starts at $10/month
- SMS costs $0.025 a message on paid plans
- Unlimited alerts cost $69/month
Pricing
4. Swym
Best for: Waitlists that feed Klaviyo, Omnisend and retargeting ads
Rating: 4.7 (442 reviews) | Price: $19.99–99.99/mo | Free trial: 30 days
Swym Back in Stock Alerts sends automatic restock alerts and reminders by email or SMS and syncs waitlists to your email platform. It's designed for stores that reuse out-of-stock demand in Klaviyo, Omnisend and retargeting ads.
Key Features
- Notify me button in any language
- Automatic restock alerts and reminders by email and SMS
- Preorder and coming soon alerts
- Klaviyo, Omnisend and Mailchimp integrations
- Facebook and Instagram retargeting through the Facebook pixel
- AI-based in-stock product recommendations
- Batch alert sending
- Multi-location support and REST API on Premium
Pros
- 30-day free trial on every plan
- Klaviyo and Omnisend on the entry plan
- Up to 25,000 alert requests a month
- Yearly billing saves 17%
Cons
- No free plan, with paid plans from $19.99/month after a 30-day trial
- Batch sending and the Facebook pixel start at $59.99/month
- Multi-location support starts at $99.99/month
- Not Built for Shopify
Pricing
5. Notify Me!
Best for: Waitlists, preorders and low stock forecasting in one app
Rating: 4.9 (3,826 reviews) | Price: $0–39.90/mo | Free trial: 7 days
Notify Me! Back in Stock Alert puts Notify Me, PreOrder and Wishlist buttons on product, home and collection pages. It's designed for stores that want waitlists, preorders and low stock forecasting run from one app.
Key Features
- Notify Me, PreOrder and Wishlist buttons (product, home and collection pages)
- Restock alerts by email, SMS and push
- D2C and B2B preorders with discounts, notes and partial payments
- Low stock counter ("only X left")
- Inventory forecasting and low stock alerts for you
- Guest wishlist with customer account extensions
- API and MCP access (integrated with Sidekick)
- Multilingual widgets and emails
Pros
- 4.9 rating from 3,826 reviews
- Email, SMS and push alerts on the free plan
- Discounted first month on every paid plan
- Built for Shopify
Cons
- Free plan includes 10 restock notifications
- 500 alerts a month on Kickstart at $9.90/month
- Collection page widgets start at $39.90/month
- Unlimited plans listed only inside the app
Pricing
6. Alert Me
Best for: Restock alerts by WhatsApp as well as email and SMS
Rating: 5.0 (36 reviews) | Price: $0–39.99/mo | Free trial: 5 days
Back in Stock Alert & Preorder sends restock alerts by email, SMS or WhatsApp to shoppers who join a waitlist. It's designed for stores whose shoppers answer on WhatsApp and that take preorders with deposits.
Key Features
- Branded Notify me button that builds a waitlist
- Restock alerts by email, SMS and WhatsApp
- Restock reminder alerts
- Preorders with deposits, automatic balance collection and a ship date
- Low stock counter from real Shopify stock
- Klaviyo subscriber sync
- Multi-language and multi-location support
- Demand, performance and revenue tracking
Pros
- Free plan with 100 email alerts a month and unlimited subscribers
- Unlimited emails on Standard at $19.99/month
- 5.0 rating from 36 reviews
- Built for Shopify
Cons
- SMS and WhatsApp alerts start at $9.99/month, plus a charge per message
- Starter includes 500 emails a month
- Klaviyo sync starts at $9.99/month
- Waitlist invites start at $39.99/month
Pricing
7. Yanet
Best for: Thousands of email, SMS and web push alerts on a small budget
Rating: 4.5 (40 reviews) | Price: $0–14.99/mo | Free trial: 14 days
Yanet: Back in stock alerts sends restock and low stock alerts by email, SMS or web push, with a live preview editor. It's designed for small stores that want thousands of alerts a month for under $15.
Key Features
- Automatic restock alerts by email, SMS or web push
- Low stock notifications
- Button and form editor with live preview
- Multi-language storefront and messages
- Widget performance reports
- Custom email sender on paid plans
- CSV export and import
- Mailing list
Pros
- Free plan with 100 alerts a month and unlimited subscribers
- 6,000 alerts a month for $14.99
- 24/7 support on the free plan
- Built for Shopify
Cons
- Branding removal starts at $6.65/month
- CSV import starts at $9.99/month
- 6,000 alerts a month is the top cap
- No preorder feature listed
Pricing
8. Kbite
Best for: Restock and price drop alerts from one waitlist
Rating: 5.0 (4,189 reviews) | Price: $0–19/mo | Free trial: 14 days
Back In Stock,Notify Me: Kbite runs restock and price drop alerts from the same out-of-stock waitlist. It's designed for stores that want to reach waiting shoppers when a product returns or goes on sale.
Key Features
- Notify me button and form, fully customizable
- Automatic back in stock alerts by email and SMS
- Price drop alerts
- Out-of-stock waitlist with product demand analytics
- Mailing list sync
- Minimum inventory limit before alerts go out
- Multi-language and multi-location support
- Batch delivery
Pros
- 5.0 rating from 4,189 reviews
- Price drop alerts on the free plan
- 5,000 emails a month for $19
- Built for Shopify
Cons
- Free plan includes 30 emails a month
- Mailing list sync and branding removal start at $5/month
- Batch delivery starts at $9/month
- SMS charged per message, from $0.02 in the US
Pricing
9. CWILL
Best for: Controlling how many shoppers each restock notifies
Rating: 4.8 (619 reviews) | Price: $0–29/mo | Free trial: 14 days
CWILL Back in Stock Notify Me! lets you choose how many shoppers each restock notifies and who hears first. It's designed for stores with limited restocks that want high-value customers alerted before everyone else.
Key Features
- Button and popup on sold-out product and collection pages
- Restock alerts by email and SMS
- Cap on shoppers notified per restock
- High-value customers notified first
- Follow-up reminders that stop after purchase or delivery
- Block-based email template editor
- Multi-language templates with auto translation
- Inventory alerts per warehouse or location
Pros
- 4.8 rating from 619 reviews
- Unlimited subscriber sign-ups on the free plan
- 3,000 notifications a month on Pro
- Discounted first month on paid plans
Cons
- Free plan includes 10 notifications a month
- Essential includes 50 notifications at $9.90/month
- SMS and custom notification rules start at $29/month
- Notifications past the Pro limit cost $0.12 per 10
Pricing
Read: [The 7 Best Push Marketing Apps for Shopify [2026]](https://vitals.app/blog/best-shopify-push-marketing-apps)
Conclusion
Back in stock alerts turn a sold-out page into a list of shoppers who already want the product. The right app makes it easy to build the waitlist, and the right follow-up makes each restock sell through faster.
- If you want back in stock alerts alongside Wishlist, Pop-ups and 40+ other tools on one subscription, choose Vitals Back in Stock App.
- If you take preorders with partial payment and send up to 1,000 restock emails a month, choose PreOrder Globo | Back in Stock on its Lite plan at $9.90/month.
- If you send more than 6,000 alerts a month and want no cap, choose Preorder, Back In Stock ‑ STOQ on its Unlimited plan at $69/month.
- If you retarget waiting shoppers with Facebook and Instagram ads, choose Swym Back in Stock Alerts on its Pro plan at $59.99/month.
- If you want inventory forecasting next to your waitlist, choose Notify Me! Back in Stock Alert.
- If your shoppers answer on WhatsApp, choose Back in Stock Alert & Preorder on its Starter plan at $9.99/month.
- If you want web push alerts for under $15 a month, choose Yanet: Back in stock alerts.
- If you also want to tell shoppers when a price drops, choose Back In Stock,Notify Me: Kbite.
- If you want to limit how many shoppers each restock notifies, choose CWILL Back in Stock Notify Me! on its Pro plan at $29/month.
Install: Vitals Back in Stock App
FAQs
1. What is the best back in stock app for Shopify?
Vitals Back in Stock App is the best back in stock app for Shopify for most stores. It comes with Wishlist, Pop-ups and 40+ other tools on one $29.99 plan, with 10,000 restock alerts a month included. Free options like Back In Stock,Notify Me: Kbite and Yanet: Back in stock alerts suit stores that only need alerts.
2. What does a back in stock app do?
A back in stock app adds a Notify me form to sold-out products and alerts each shopper when the product returns. The best ones add SMS, reminder emails and waitlist reports, so you can see which products to reorder first.
3. Does a back in stock app support SMS alerts?
Not all of them. Preorder, Back In Stock ‑ STOQ sends SMS at $0.025 a message, and Back in Stock Alert & Preorder adds SMS and WhatsApp from $9.99/month. Vitals includes 20 SMS alerts a month, then charges by country.
4. Can I send a reminder after the restock alert?
Yes, and it matters. A reminder reaches shoppers who saw the first alert but didn't buy, often while the product is still in stock.
5. What's the difference between a back in stock alert and a preorder?
A back in stock alert tells the shopper when the product returns, and they buy at that point. A preorder takes the order before the stock arrives and ships it later. The best apps do both.