Looking for a Preorder, Back in Stock Duck alternative for Shopify?
Duck is a preorder and back-in-stock app from Peppyduck with a Built for Shopify badge and 5.0 stars across 400+ reviews. It covers presales, backorders, “Notify me” waitlists, and automated restock alerts. WhatsApp alerts are available on the PRO plan and above, and the team is known for personal, human-only support, including 30-minute Zoom calls.
If you need more advanced payment options, such as deposits, split payments, or 0 upfront preorders, and campaign-based control for managing multiple launches at once, Essential Preorder Back in Stock covers more ground.
Quick Verdict
- Best for WhatsApp restock alerts and simple setup: Preorder, Back in Stock Duck
- Best for flexible payments and campaign-based preorder control: Essential Preorder Back in Stock
- Best for merchants running multiple launches or made-to-order products: Essential Preorder Back in Stock
Both apps are free to start, have a Built for Shopify badge, and handle the core preorder and back-in-stock workflow. Duck’s standout is WhatsApp on paid plans and a strong founder-led support culture. Essential Preorder Back in Stock’s standout is payment depth (deposits, split payments, 0 upfront), campaign-based preorder management with three activation modes, and direct founder access for onboarding calls alongside 24/7 support on every plan.
👉 Install Essential Preorder Back in Stock and test it on your store
Available on the Shopify App Store as “Essent Preorder Back in Stock”
Essential Preorder Back in Stock vs Preorder, Back in Stock Duck
Both apps help Shopify merchants:
- sell out-of-stock products via preorder and backorder
- collect demand through “Notify me” waitlists
- send automated back-in-stock alerts
- customize preorder buttons and storefront messaging
- track inventory and customer demand
The difference is in payment flexibility, campaign structure, and notification channels.
Essential Preorder Back in Stock offers:
- campaign-based setup with three preorder activation modes
- full, partial, split, deferred, and 0 upfront payment options
- preorder on in-stock products for presales and launches
- partial payments available on the free plan
- PageFly and GemPages integration
Preorder, Back in Stock Duck offers:
- clean product-level preorder and back-in-stock setup
- WhatsApp alerts on PRO plan and above, with custom branding
- no transaction fees on all plans, including free
- Shopify Markets multi-language on PRO plan and above
- 24/7 human-only live chat on Essentials plan and above
- 30-minute Zoom call support available
Duck is a focused preorder and restock app with WhatsApp as a real differentiator. Essential Preorder Back in Stock is the stronger choice when payment flexibility and campaign-level control are the priority.
Feature Comparison
| Feature | Essential Preorder Back in Stock | Preorder, Back in Stock Duck |
|---|---|---|
| Preorders & backorders | Yes | Yes |
| Back in stock alerts | Built-in | Built-in |
| Notify me button | Yes | Yes |
| Email alerts | Yes | Yes |
| WhatsApp alerts | No | Yes (PRO and ELITE plans) |
| Shopify Markets / multi-language | Coming soon | Yes (PRO plan+) |
| Partial payments | Yes | Not prominently listed |
| Split payments | Yes | Not listed |
| 0 upfront preorder | Yes | Not listed |
| Deposits | Yes | Not listed |
| Campaign-based setup | Yes | Product-level setup |
| Preorder on in-stock products | Yes | Not listed |
| No transaction fees | Yes (Professional plan) | Yes (all plans) |
| 24/7 live chat support | Yes (all plans) | Yes (Essentials plan+) |
| Zoom call support | Yes | Yes |
| Free plan | Yes | Yes |
Key Differences
1. Payment flexibility
Duck covers the standard preorder flow (customers buy, you fulfill), but doesn’t list advanced payment structures like deposits, split payments, or 0 upfront options.
Essential Preorder Back in Stock supports the full range:
- full payment at preorder checkout
- partial payment with balance collected later
- deposits with deferred balance collection
- split payment schedules
- 0 upfront preorders: customers reserve without any immediate charge
All of these are available on the free plan for partial payments, with full flexibility on paid plans. For stores selling high-ticket items or made-to-order products, the choice of payment structure has a direct impact on conversion.
2. WhatsApp alerts
Duck’s WhatsApp integration is a genuine differentiator. On PRO and ELITE plans, merchants can send branded back-in-stock alerts via WhatsApp with a custom logo, phone number, and message templates. For stores where WhatsApp is a primary customer channel (common in markets across Southeast Asia, the Middle East, and Latin America) this is a real advantage that most preorder apps don’t offer.
Essential Preorder Back in Stock focuses on email-based alerts. For stores whose customers primarily engage via email, this covers the core need well.
3. Campaign structure
Duck uses product-level setup. Preorders and alerts are configured per product or variant, which is straightforward for stores with a focused catalog.
Essential Preorder Back in Stock uses a campaign-based approach with three activation modes: show preorder when out of stock, always show preorder, or show preorder while in stock. That third mode is the key difference: it lets merchants run presales and launch campaigns on live inventory, test demand before a product is produced, or keep a made-to-order product permanently in preorder mode without touching inventory levels.
4. Transaction fees
Duck has no transaction fees on any plan, including the free tier. For Essential Preorder Back in Stock, transaction fees are removed on the Professional plan. That said, lower tiers charge per-preorder above monthly limits rather than a flat transaction fee, so if you have a one-time surge in preorders, you’re only paying for the extra volume, not upgrading your entire plan.
For stores with moderate preorder volumes on lower plans, Duck’s no-fee structure across all tiers is worth noting.
5. Support
Both apps put a strong emphasis on human support. Duck specifically advertises human-only live chat (no bots) on the Essentials plan and above, plus 30-minute Zoom calls for more advanced help. The founder offers a personal 30-day refund guarantee. Reviews consistently praise the team for going above and beyond.
Essential Preorder Back in Stock responds in under 10 minutes, 24/7, on every plan, including free. Onboarding calls with the founder are available, and product updates ship weekly based on merchant feedback.
Running launches or made-to-order products?
Essential Preorder Back in Stock handles the full workflow.
Pricing & Plans
Both apps offer a free plan. Duck’s free plan includes 20 preorders per month with no transaction fees. Essential’s free plan includes 10 preorders with partial payment support.
Essential Preorder Back in Stock
Usage-based pricing. Start free and scale as preorder volume grows.
Free
- 10 preorders/month
- 300 back-in-stock notifications/month
- unlimited “Notify me” sign-ups
- full and partial payment support
- customizable buttons, forms, and emails
- 24/7 support
Lite – $5/month
- 50 preorders/month
- 500 back-in-stock notifications/month
- translations, custom email domain, preorder confirmation emails
- $0.25/preorder and $1/100 notifications above limit
- 14-day free trial
Essentials – $25/month
- 500 preorders/month
- 3,000 notifications/month
- full feature access, custom email domain, translations
- $0.10/preorder and $1/100 notifications above limit
- 14-day free trial
Professional – $59/month
- unlimited preorders and notifications
- no additional transaction fees
- 24/7 priority support
- 14-day free trial
Preorder, Back in Stock Duck
Free
- 20 preorders/month, no transaction fees
- 30 back-in-stock emails/month
- unlimited Notify me signups
- customize buttons, signup forms, emails
- automatic back-in-stock alerts
- variant-specific alerts
- Peppyduck branding
Essentials – $10/month
- unlimited preorders, no transaction fees
- 500 back-in-stock emails/month
- remove Peppyduck branding
- email from your domain
- multi-location inventory
- advanced preorder and Notify me settings
- 24/7 human-only live chat support
- 7-day free trial
PRO – $29/month
- unlimited preorders, no transaction fees
- 3,000 back-in-stock alerts/month
- WhatsApp alerts with logo and brand name
- Shopify Markets: advanced multi-language
- grow mailing lists
- back-in-stock reminder notifications
- 24/7 human-only live chat support
- 7-day free trial
ELITE – $59/month
- unlimited preorders and back-in-stock alerts
- API integration
- dedicated Customer Success Manager
- 24/7 human-only live chat support
- 7-day free trial
Key pricing difference: Duck offers unlimited preorders with no transaction fees from the free plan, scaling by back-in-stock alert volume. Essential scales by preorder volume and includes partial payments on the free plan. Duck reaches unlimited alerts at $59/month (ELITE). Essential reaches unlimited preorders and notifications at $59/month (Professional).
Which App Is Better for Different Use Cases?
| Use Case | Best Choice |
|---|---|
| Best overall preorder app | Essential Preorder Back in Stock |
| WhatsApp restock alerts | Duck (PRO plan+) |
| Simple preorder + restock setup | Both |
| No transaction fees on preorders | Both (paid plans) |
| Flexible deposits and split payments | Essential Preorder Back in Stock |
| 0 upfront preorder campaigns | Essential Preorder Back in Stock |
| Preorder on in-stock products | Essential Preorder Back in Stock |
| Product launches and presales | Essential Preorder Back in Stock |
| Shopify Markets multi-language | Duck (PRO plan+) |
| Scaling preorder revenue | Essential Preorder Back in Stock |
👉 See how Essential Preorder Back in Stock fits your store before your next launch or restock cycle.
When to Choose Each App
Choose Essential Preorder Back in Stock if:
- you need flexible payment options — deposits, split payments, or 0 upfront
- you want to run preorder campaigns on in-stock products, not just sold-out ones
- you want campaign-based preorder control across multiple products simultaneously
- you run product launches, presales, or made-to-order campaigns
- you want partial payments available from the free plan
- you want fast support with direct founder access and regular product updates
Choose Duck if:
- WhatsApp is an important notification channel for your customers
- you want unlimited preorders with no transaction fees from the free plan
- you want human-only live chat support with no bots
- your preorder needs are straightforward and don’t require advanced payment structures
- you want Shopify Markets multi-language support (available from PRO plan)
Switching from Duck to Essential Preorder Back in Stock
Your Shopify products, orders, and customer records stay exactly as they are. You’re only switching the storefront logic that controls preorder buttons and restock capture. Follow these steps:
- Install Essential Preorder Back in Stock from the Shopify App Store
- Create preorder campaigns for your products (out-of-stock, always-on, or scheduled)
- Set up “Notify me” buttons for products where you want to capture restock demand
- Test preorder and restock flows on a product before going live
- Disable Duck on your storefront once Essential is confirmed working
If you want to keep Duck running for WhatsApp alerts while transitioning preorder logic to Essential, both apps can run side by side during the switch.
Final Verdict
Preorder, Back in Stock Duck is a focused, thoughtfully built app with 5.0 stars, Built for Shopify badge, and a support culture that stands out. The WhatsApp integration on PRO plans is a genuine differentiator for stores in markets where WhatsApp drives customer engagement. Unlimited preorders with no transaction fees from the free tier is also a strong value proposition for stores testing preorder flows.
Essential Preorder Back in Stock is the stronger option when payment flexibility matters. Split payments, 0 upfront preorders, deposits, and campaign-based control across multiple launches give merchants tools Duck doesn’t currently offer. Partial payments are available from the free plan, so the core payment flexibility doesn’t require upgrading.
Merchants running regular launches, managing made-to-order products, or needing more control over how and when customers pay will find Essential Preorder Back in Stock the more complete solution.
👉 Get started and launch your first campaign in minutes
FAQs
What is the best alternative to REZ preorder app?
Essential Preorder Back in Stock is the strongest alternative for merchants who need more payment flexibility alongside preorders and back-in-stock alerts. Essential Shopify preorder app supports split payments, deferred payments, and 0 upfront preorders in a campaign-based system, with partial payments included on the free plan.
Is REZ Preorder, Back In Stock free?
Yes. REZ is listed as free on the Shopify App Store with no paid tiers. All features, including deposits, preorder discounts, back-in-stock alerts, multi-language support, and demand analytics, are available at no cost.
Can REZ handle deposits or partial payments?
Yes. REZ supports full payments and deposits on preorders, and offers preorder discounts as an incentive. It does not prominently list split payment schedules, deferred payments, or 0 upfront preorder options. Essential Preorder Back in Stock supports all of these.
Does REZ support preorders on in-stock products?
REZ preorders activate on out-of-stock products. If you want to run a presale or launch campaign on a product that still has inventory, Essential Preorder Back in Stock supports this through its always-on and in-stock campaign activation modes.
Do I need separate apps for preorder and back-in-stock?
No. Both Essential Preorder Back in Stock and REZ handle preorders and back-in-stock alerts in one app. Essential adds split payments, 0 upfront options, deferred payment schedules, campaign scheduling, and per product inventory limits beyond what REZ currently offers.
