A sold-out product page is either a dead end or a demand sensor. Without a waitlist, the visitor bounces to a competitor. With one, you capture the sale for later, learn exactly how much to reorder, and can even collect the money before your inventory lands.
These are the ten best Shopify apps for pre-orders, presales and restock alerts in 2026.
1. Preorder, Back In Stock ‑ STOQ
STOQ is the category leader for a reason: restock alerts and pre-orders in one app, with per-variant waitlists and email plus SMS notifications that fire the moment stock returns.
back-in-stock-restock-alertsStandout feature: Variant-level waitlists with instant automated notifications, so demand maps exactly to the sizes and colors you need to reorder.
2. Notify! Back in Stock | PreOrder
Notify! combines back-in-stock alerts, pre-orders and a "coming soon" mode, covering the full product availability lifecycle from teaser to restock.
preorder-back-in-stockStandout feature: Coming-soon campaigns that build a waitlist before launch day, turning product releases into events.
3. Preorder Now Presale Timesact
Timesact focuses on presale mechanics: pre-order discounts, countdowns and scheduled availability windows that create urgency around future inventory.
timesact-discount-pre-orderStandout feature: Automatic pre-order discounts that decrease as the ship date approaches, rewarding the earliest committers.
4. PreOrder Globo | Back in Stock
Globo's app covers pre-orders with partial payments and deposits, the feature that matters most for high-ticket items where full prepayment is a hard sell.
pre-order-proStandout feature: Deposit-based pre-orders, collecting a percentage now and the balance before shipping.
5. Essent Preorder Back in Stock
A fast, clean pre-order and restock app with the essentials done well. The right pick if the bigger apps feel like more machine than you need.
essential-pre-orderStandout feature: Setup measured in minutes, with sensible defaults that need no configuration rabbit hole.
6. Swym Wishlist Plus
Wishlists are the softest form of demand capture: shoppers flag intent months ahead. Swym then alerts them on restocks and price drops automatically.
swym-relayStandout feature: Back-in-stock alerts triggered from wishlist items, catching demand that never clicked a "notify me" button.
7. Klaviyo: Email Marketing & SMS
Waitlist subscribers are your hottest segment. Klaviyo turns back-in-stock events into full flows: the alert, the follow-up, the cross-sell if the item sells out again.
klaviyo-email-marketingStandout feature: Back-in-stock flows with your full customer data attached, so restock alerts become personalized campaigns rather than pings.
8. Pop Convert ‑ Pop Ups, Banners
Before a product launches, Pop Convert builds the audience for it with popups and banners that funnel visitors onto your launch list.
pop-convertStandout feature: Free, unlimited popups and banners, the cheapest way to grow a presale list before the pre-order button even exists.
9. Shopify Flow
Flow automates the operational side of pre-orders: tag pre-order purchases, route them to separate fulfillment, and notify your team when waitlist thresholds are hit.
flowStandout feature: Free, first-party automation that keeps pre-order orders from getting mixed into regular fulfillment.
10. ParcelWILL Order Tracking
Pre-order customers wait longer, and waiting customers open more support tickets. ParcelWILL gives them a branded tracking page and proactive delay updates.
parcelpanelStandout feature: Proactive shipping updates that keep long pre-order lead times from turning into refund requests.
Picking your setup
If you want one app that does both jobs, start with STOQ or Notify!. Selling high-ticket items, add Globo for deposits. Then wire the demand you capture into Klaviyo flows so a restock becomes a revenue event, not just a notification. The stack pays for itself the first time a waitlist tells you exactly how many units to reorder.