Zooomy Back in Stock vs SetuBridge Notify Me: which restock alert app fits your Shopify store?

A sold-out product page is one of the few places where a visitor has already told you what they want and you have nothing to sell them. A restock alert app keeps that intent alive by collecting a contact and writing back when the item returns. If you have read our notes on what actually converts with low stock messaging, this is the other side of the same problem: not the moment before a product runs out, but the weeks after.

The two apps here are not the names that show up in every roundup. Zooomy Back in Stock and SetuBridge Notify Me are second-tier in visibility but not in standing: both hold the Built for Shopify badge and both still collect fresh reviews. They solve the same job, yet their price curves are so different that the right choice depends almost entirely on how many alerts you expect to send.

Everything below comes from the two App Store listings, their review pages and SetuBridge's help center, read on November 9, 2026. Where a listing is silent, we say so instead of guessing.

Who makes each app

Zooomy Back in Stock

The listing is titled Back in stock Restock Preorder and is published by Zooomy, launched on February 27, 2019. Zooomy's website presents a small family of Shopify apps, including a wishlist, Shop The Look, Lookbook, a cross-sell tool and a free shipping bar. Its pitch is narrow: add a Notify Me button to product and collection pages, let shoppers subscribe, send an email when the item returns. The listing is in English and works with Shopify Admin, Checkout and Klaviyo.

The review page is the app's strongest argument. Long-term users describe it as something they installed years ago and stopped thinking about, and one reviewer who hit a sending problem says chat support fixed it within minutes. The most recent review on the first page at the time of writing dates from June 12, 2026.

SetuBridge Notify Me

The listing is titled Back In Stock Alert - Notify Me, published by SetuBridge and launched on October 19, 2020. SetuBridge describes itself as an eCommerce development agency located in India, working on Shopify and Magento. That heritage shows in the product, which reads like a Coming Soon tool that expanded: its help center still refers to the app as Coming Soon and covers release dates, countdowns and automatic launches alongside restock alerts.

The listing is available in 11 languages, including French, German and Spanish, and the integration list is long: Klaviyo, Mailchimp, Omnisend, SendinBlue, Sendgrid, Twilio and WhatsApp, among others. Reviews are recent (the latest on the first page is dated October 23, 2026) and support is the most repeated compliment. It also has the critics you would expect from a broader tool: 10 one-star ratings out of 213, and a July 2026 review reporting that the Facebook and Instagram sales channel did not work at the time.

Criterion by criterion

Cost per alert

This is where the comparison is decided for most stores. Dividing each plan's price by its included volume gives a clean picture.

SetuBridge is cheaper per message at every level, and it publishes overage rates ($5 per 1,000 extra on Growth, for instance), so a good restock month does not force an upgrade. Zooomy's listing shows no overage rate, even though its billing line mentions usage-based charges. If you plan to run close to a Zooomy limit, ask support what happens past it.

The counterweight is the product cap. SetuBridge limits you to 100 products on Basic and 1,000 on Growth. Zooomy lists no product cap at all, only subscription and email ceilings.

When automation starts

The whole point of this category is not having to remember. Zooomy adds automatic email on Pro at $5.99. SetuBridge writes "Auto notify when product back in stock" on its Growth plan at $7.99, while Basic only names back in stock alerts generally. So the cheapest listed automation is Zooomy by $2 a month, but for those $2 SetuBridge gives you 20 times the volume. We could not confirm from the listing how sends behave on Basic, so test it during the 7-day trial if you intend to stay there.

Channels

Zooomy is an email tool, and that is a fair choice for a store whose customers live in their inbox. SetuBridge adds WhatsApp on paid plans and web push, which its help center says is triggered by a browser permission prompt when the form is submitted. WhatsApp runs through a Twilio connection, and the listing does not say whether Twilio's own fees are covered. SMS is a grey area: Twilio appears in the integrations, but no plan line names SMS. If texts are your priority, neither app is a clear fit on its listing alone. Our SMS versus email breakdown can help you decide whether that channel is worth it at all.

Pre-orders

Both listings use the word, with very different depth. Zooomy says a preorder feature is available and stops there: no plan, no mechanics, and Pre-orders is not one of its App Store categories. SetuBridge lists pre-orders from $4.99 with order types, availability dates, badges, countdowns, and partial and split payments among the payment options. If taking deposits is central to your business, you may also want to read our K1 PreOrder vs Advanced PreOrder comparison, since dedicated tools go further.

Integrations and list ownership

Klaviyo is the sharpest difference: $19.99 on Zooomy and $7.99 on SetuBridge. SetuBridge also lists SMTP so emails go out from your own domain, and Growth carries the line "No 3rd-Party Email Usage Fees". Zooomy's specific benefit is a sync of subscribers to your Shopify customer list, useful for later campaigns, though you should check that a restock request gives you the consent marketing requires in your market.

On portability, Zooomy names import and export. It is not listed on SetuBridge's App Store page, and we did not find it in the articles visible in its help center, whose list is partly collapsed.

Setup and day-to-day use

Reviewers of both call installation easy. The real gap is what happens when you are stuck: SetuBridge links an FAQ, a help center and a public changelog, while Zooomy's listing has no documentation link and its website does not describe the setup. In practice Zooomy depends on its chat support, which reviewers rate well. SetuBridge also notes that quick view, filter and load-more buttons may need extra integration work, which can be billed as custom work, so test a theme that uses those patterns.

Three stores, three answers

A candle maker with 30 products

A handful of restocks each month and perhaps 60 waiting customers. Volume is irrelevant here. Zooomy Pro at $5.99 gives automatic emails, removes branding and leaves little to configure. SetuBridge Basic is $1 cheaper, but since auto-notify is named only on Growth, Zooomy is the simpler pick unless the trial shows otherwise.

An apparel brand selling across Europe

800 products, sizes that sell out weekly, three languages, Klaviyo already running. SetuBridge Growth at $7.99 covers the catalog, 2,000 alerts, Klaviyo and multi-language. Zooomy would need Premium at $19.99 for Klaviyo, with no listed multi-language support.

A sneaker reseller with big waitlists

One drop can trigger thousands of alerts in a day. SetuBridge Premium offers 5,000 alerts for $15.99, unlimited products and batch send, against 3,000 emails for $39.99 on Zooomy Advanced. Pace your sends: the alert only helps if there is stock left when people click. Our post-purchase email sequence is a useful next step for turning those buyers into repeat customers.

Moving from one app to the other

Neither listing documents a migration path, so treat this as a small project rather than a toggle.

Going from Zooomy to SetuBridge, first send any pending alerts for items already restocked. Export your subscribers using Zooomy's listed export, then ask SetuBridge support how to bring them in, since import is not listed on its page. Remove the old Notify Me button before enabling the new one so sold-out products do not show two forms.

Going from SetuBridge to Zooomy, the blocker is getting data out. Ask SetuBridge how to retrieve registrations before uninstalling. Its help center says settings are kept across uninstall and reinstall by default, which gives you a safety net, but it does not say subscribers can be exported.

Either way, test one sold-out variant end to end, from form to received email, on mobile. For more on this category, see our XFlow vs Back In Stock! Alert Engine comparison, and our guide on when free apps stop being enough if you are still deciding whether to pay.