February 21, 2026 · Gaurav Radadiya
Shopify doesn’t include native restock notifications. If a product goes out of stock, there’s no built-in way to tell customers when it’s back. You need a third-party app for that, and there are dozens of them.
The problem? Most “best restock notification apps” articles are written by the apps themselves, ranking their own product first. This guide doesn’t do that. Instead, it compares the best Shopify restock notification apps by what matters: notification channels, automation quality, integrations, analytics, and real pricing. Back in stock emails achieve a 65.32% average open rate, the highest of any email automation type (Barilliance email marketing research, 2024). Picking the right app to send those alerts can mean the difference between recovering revenue and losing it to a competitor.
Here’s a feature-by-feature breakdown of the top restock notification apps available on Shopify in February 2026.
The best restock notification app for your Shopify store depends on four factors: notification channels, automation quality, analytics depth, and integration support. Most merchants focus on ratings alone, but a 5-star app with 50 reviews tells you less than a 4.6-star app with 500 reviews. Features matter more than stars.
Not every customer checks email. The best restock notification apps support multiple channels so your alert actually gets seen.
The best apps auto-detect when you restock and send alerts without manual intervention. Look for minimum quantity thresholds (send only when you have enough stock), batch sending (stagger alerts to avoid selling out instantly again), and scheduled vs instant delivery options.
Can the app tell you whether an alert led to a sale? Purchase tracking connects a restock notification to an actual purchase, showing your real ROI. Demand dashboards show which products have the highest waitlist volume. CSV export lets you analyze data externally. Most free plans skip all of this.
If you use Klaviyo, you’ll want an app that syncs subscriber data directly into your flows. Shopify Flow compatibility lets you build custom automations. Webhook support connects the app to virtually any third-party tool. For stores running automated restock emails on Shopify, integration depth determines how much control you have over the notification workflow.
Here’s how the top restock notification apps compare across features, pricing, channels, and integrations as of February 2026.
| App | Rating | Starting Price | Channels | Klaviyo? | Custom Domain? | Best For |
|---|---|---|---|---|---|---|
| StoreBeep | 5.0 | Free (50 emails) | Email, WhatsApp | CSV export | Yes ($9.99) | Multi-channel + custom domain |
| Swym | 4.8 | Free (limited) | Email, SMS | Yes (direct) | No | Klaviyo-native integration |
| Notify! | 5.0 | Free (limited) | Email, SMS, Push, WhatsApp | No | No | Widest channel breadth |
| STOQ | 5.0 | Free (limited) | Email, SMS | No | No | Preorder + restock combo |
| Appikon | 4.6 | Free (limited) | Email, SMS | Yes (direct) | No | Klaviyo integration |
| PushOwl (Brevo) | 4.7 | Free (limited) | Push, Email, SMS | No | No | Push-first strategy |
| Alert Me! | 4.8 | Free (10/mo) | No | No | Simple email-only alerts |
StoreBeep focuses on multi-channel collection and professional email delivery. The free plan includes 50 email alerts per month with WhatsApp number collection built in. The Pro plan ($9.99/month) adds custom sender domains, so alerts come from your brand’s email address instead of a generic third-party domain. It also includes purchase tracking, demand insights, CSV export, and webhook integrations. Best fit for stores that want multi-channel data collection and branded emails without overpaying.
Swym is the most established app in this space with 650+ reviews. Its direct Klaviyo integration is the strongest of any restock app, syncing subscriber data directly into Klaviyo flows and segments. Swym also supports variant-level subscriptions (customers can subscribe to specific sizes and colors) and includes SMS alerts. Pricing starts at $14.99/month after the free plan. Best for stores already invested in the Klaviyo ecosystem.
Notify! offers the widest channel breadth of any restock notification app: email, SMS, push notifications, and WhatsApp all in one app. It includes preorder functionality alongside restock alerts. The free plan is limited, with full features requiring paid tiers. Best for merchants who want a single app covering every notification channel.
STOQ combines preorder and back in stock functionality in one app. Customers can either preorder out-of-stock items or subscribe for restock alerts. The app supports email and SMS channels with clean, customizable templates. Best for stores that want preorder capability alongside restock notifications without installing two separate apps.
Appikon offers solid Klaviyo integration with email and SMS alerts. Its interface is straightforward, and it supports auto-detect restocking and batch notifications. Pricing is competitive across tiers. Best for stores that need a reliable Klaviyo connector for restock subscriber data.
PushOwl, now part of Brevo, leads with push notifications. Push alerts hit a 4.4% average conversion rate (MobiLoud push notification statistics, 2025), and there’s no per-message cost. The app also supports email and SMS. Best for stores that want push-first restock alerts with email as a secondary channel.
Alert Me! is the simplest option. Email-only alerts with a clean interface and minimal setup. The free plan caps at 10 alerts per month. Paid plans are affordable but lack multi-channel support. Best for stores that want basic email restock alerts with zero complexity.
Ratings and pricing tell part of the story. Here’s how the apps stack up on the features that directly affect your revenue recovery.
| Channel | Open Rate | Click Rate | Cost Per Message | Best Apps |
|---|---|---|---|---|
| 58-65% | 21% | Included in plan | All apps | |
| SMS | 90%+ | 36% | $0.01-0.05 | Notify!, STOQ, Swym |
| 98% | 45-60% | Varies by BSP | StoreBeep, Notify! | |
| Push | 20% | 28% | Free | PushOwl, Notify! |
Email is the most accessible channel, but multi-channel restock alerts consistently outperform single-channel because more customers actually see the notification. A store sending alerts via email and WhatsApp reaches customers who ignore email but respond to messaging apps.
| App | Free Plan | Entry Paid | Mid Tier | High Tier |
|---|---|---|---|---|
| StoreBeep | 50 emails/mo | $9.99 (1,000) | $19.99 (3,000) | $29.99 (10,000) |
| Swym | Limited | $14.99 | $49.99 | $99.99 |
| Notify! | Limited | $9.99 | $19.99 | $49.99 |
| STOQ | Limited | $9.99 | $19.99 | $49.99 |
| Appikon | Limited | $9.99 | $19.99 | $29.99 |
| PushOwl | Limited | Free (push) | $19/mo | Custom |
| Alert Me! | 10 alerts/mo | $4.99 | $14.99 | $29.99 |
If you’re looking specifically at what free plans offer, our detailed breakdown of free back in stock apps on Shopify compares every free tier side by side.
| App | Klaviyo | Shopify Flow | Webhooks | CSV Export |
|---|---|---|---|---|
| StoreBeep | Via CSV/webhook | No | Yes | Yes |
| Swym | Direct integration | Yes | Yes | Yes |
| Notify! | No | No | No | Limited |
| STOQ | No | No | No | Limited |
| Appikon | Direct integration | No | Yes | Yes |
| PushOwl | No | Yes | No | No |
| Alert Me! | No | No | No | No |
Swym and Appikon offer the deepest Klaviyo integration. StoreBeep connects via webhooks and CSV export, which works with any email platform, not just Klaviyo.
The right app depends on where your store is today, not where you want it to be in a year. Here’s a practical framework.
Start with a free plan. You don’t need SMS, WhatsApp, or advanced analytics yet. StoreBeep gives you 50 free emails per month with WhatsApp collection built in, so you’re collecting multi-channel data even before you upgrade. Alert Me! works if you only need basic email alerts and have fewer than 10 stockouts per month.
You’re outgrowing free plans. Look for custom sender domains (emails from your brand, not a generic app address), purchase tracking (know your actual ROI), and at least one additional channel beyond email. StoreBeep Pro ($9.99) and Notify! ($9.99) both offer strong value here.
Integration depth matters most at scale. If you run Klaviyo, Swym is the strongest option with direct flow integration. If you need multi-channel alerts across email, SMS, and WhatsApp, Notify! covers the widest range. If custom sender domains and webhook flexibility matter, StoreBeep gives you the most control over your notification pipeline. When stockouts cost your store revenue, understanding what stockouts actually cost your Shopify store helps justify the investment.
The numbers are clear. Back in stock alerts convert at rates that dwarf typical e-commerce benchmarks. The average e-commerce conversion rate sits at 2.5-3% (BlendCommerce, 2026). Restock alert emails convert at 22.45% (MarketingSherpa, 2024). That’s roughly 8x the average.
Here’s the math for a mid-size Shopify store:
That’s from a single notification channel. 69% of shoppers leave to buy from a competitor when they hit an out-of-stock page (Opensend customer behavior data, 2025). Without a restock notification app, those customers are gone.
Stores using multi-channel restock alerts (email + one additional channel) typically see 25-35% higher recovery rates than email-only approaches. The reason is simple: different customers prefer different channels. A customer who ignores email might open a WhatsApp message within minutes. Adding a second channel doesn’t double your costs, but it significantly increases the chance your alert gets seen.
If you want to add a Notify Me button on Shopify, most apps set it up automatically in under five minutes. No code needed.
What is the best restock notification app for Shopify?
The best app depends on your needs. StoreBeep excels at multi-channel collection and custom sender domains, Swym integrates natively with Klaviyo, and PushOwl leads with push notifications. For most stores, StoreBeep or Notify! offer the best balance of features and pricing.
Does Shopify have built-in back in stock notifications?
No, Shopify does not offer native restock notifications. You need a third-party app from the Shopify App Store to add a “Notify Me” button and send automated alerts when products are restocked.
How much do restock notification apps cost?
Most apps offer a free plan with 10 to 50 emails per month. Paid plans typically start at $5 to $10 per month for higher email limits, custom branding, and additional channels like SMS and WhatsApp.
Which restock notification app works with Klaviyo?
Appikon and Swym offer direct Klaviyo integration, syncing subscriber data into your Klaviyo flows. StoreBeep supports CSV export and webhooks, which connect to Klaviyo and other email platforms.
Do restock notification apps slow down my store?
No. Modern restock apps use asynchronous loading, meaning the “Notify Me” button loads after the rest of your page. This prevents any negative impact on page speed or Core Web Vitals.
Which channel works best for restock notifications?
Email is the most common and reliable channel with a 58% open rate for restock alerts. WhatsApp achieves 98% open rates but requires opt-in. Push notifications offer a 28% click rate with no per-message cost. The best approach combines two or more channels.
Can restock notification apps track sales from alerts?
Some apps offer purchase tracking that connects alerts to actual sales. StoreBeep, Swym, and Notify! include some form of purchase or click tracking. Free plans typically lack this feature.
How many emails should a restock notification app send per month?
This depends on your stockout frequency and subscriber volume. Stores with fewer than five stockouts per month may need 50 to 200 emails. Growing stores typically need 500 to 3,000. High-volume stores may need 5,000 to 10,000+.
Should I use one restock notification app or multiple?
Use one app. Running multiple restock apps creates duplicate notifications, confuses customers, and wastes resources. Pick the one that matches your channel and integration needs, then scale within it.
What’s the difference between a restock notification app and a preorder app?
A restock notification app alerts customers when a previously out-of-stock product is back. A preorder app lets customers purchase before the product is available. Some apps like STOQ and Notify! combine both features.
Every app on this list works. The right one for your store depends on what you need right now, not what has the most stars.
If you want multi-channel collection with custom sender domains and purchase tracking at a fair price, StoreBeep restock notification app starts free with 50 emails per month and scales to 10,000 on the Ultra plan. If Klaviyo integration is your priority, Swym has the deepest native connection. If you need every channel in one app, Notify! covers email, SMS, push, and WhatsApp.
Start with the free plan of whichever app matches your priorities. Track your results. Upgrade when the recovered revenue justifies it, because 87% of retailers acknowledge that stockouts directly damage customer loyalty (Amra & Elma, 2025), and a restock notification app is the simplest way to keep those customers coming back.
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