Back In Stock! Alert Engine vs Notifly: Price Drop Alerts
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 9, 2026 for Back In Stock! Alert Engine, Oct 24, 2026 for Notifly.
The short answer
- Both list a free plan. Paid plans start at $4/month for Back In Stock! Alert Engine and $9.99/month for Notifly.
- Back In Stock! Alert Engine lists 39 features Notifly’s listing doesn’t mention, including Abandoned cart, Alert settings, Analytics.
Head to head
- United States
- United Kingdom
- Canada
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free Plan
- · 50 Email Alerts
- · Custom Alert Templates
- · Custom Notify Me Button
- · Email open, delivery & read logs
- · Import/Export Subscribers
- · Restock Alert Only
Basic Plan
- · Custom Notify Me Button
- · Email open, delivery & read logs
- · Import/Export Subscribers
- · Insights
- · Restock Alert Only
- · Swap/Replace Subscriber Product
Advanced Plan
- · Custom Notify Me Button
- · Email open, delivery & read logs
- · Import/Export Subscribers
- · Insights
- · Low Stock & Restock alert
- · Swap/Replace Subscriber Product
Premium Plan
- · Custom button Product & Collection page
- · Email from your domain
- · Everything in Basic plan
- · Integrations with Klaviyo, Omnisend
- · Multi-language
- · Multi-locations (inventory)
Free
- · 100 notifications/month
- · Basic analytics
- · Email notifications
- · Shop branding
Basic
- · 1,000 notifications/month
- · 4 email template presets
- · Product demand analytics
Pro
- · 5,000 notifications a month
- · Custom email templates
- · Discount code automation
- · Email alerts included
- · Full analytics export
- · Recovered revenue tracking
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureBack in Stock! Alert Engine is an all-in-one marketing tool to help you recover lost sales. Don't miss out on lost sales with Back In Stock & Restock Alerts, Abandoned carts, price drop, and low stock notifications through Emails. Shows the Notify Me!! button on out of stock products and automatically sends notifications when they get in stock.
Every time a product sells out or feels too expensive, you lose a customer who was ready to buy. Most won't come back on their own. Notifly fixes this. Shoppers subscribe from your product page in one click, by email. Pro stores can also offer SMS and WhatsApp alerts through their own Twilio account. When you restock or drop a price, Notifly notifies them automatically. No manual work, no missed sales.
- Restock Alerts: Send automatic and manual back in stock notifications via Email.
- Setup Notify Me Buttons in Minutes; Customize Buttons to Match Brand Guidelines.
- Grow Email Lists & Sync to Email Providers Like Klaviyo.
- Restock alert, Low stock alert, price drop alert, multilingual tools, and more!
- Automated back-in-stock and price drop alerts sent by email or SMS
- Customizable email templates with brand colors, logo, and discount codes
- Recovered revenue and conversion tracking to measure notification impact
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Back In Stock! Alert Engine |  Notifly |
|---|---|---|
| Detected stores | 94 | Not published |
| Net store change, 28 days | +3 | 0 |
| Stores added, 28 days | 3 | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Apparel & Accessories, Food, Beverages & Tobacco, Health & Beauty | Not published |
| Top store countries | United States, United Kingdom, Canada | Not published |
Reviews
| Measure | Back In Stock! Alert Engine | Notifly |
|---|---|---|
| App Store rating | 4.9 ★ | Not published |
| App Store reviews | 26 | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Back In Stock! Alert Engine | Notifly |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $4/month(ahead) | $9.99/month |
| Longest free trial | 7 days | 14 days |
| Plans listed | 4 | 3 |
Listing
| Measure | Back In Stock! Alert Engine | Notifly |
|---|---|---|
| Shopify category rank | #21(ahead) | #209 |
| Shopify App Charts | #15 in Stock alerts | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Dec 23, 2024 | May 15, 2026 |
| Languages | 1 | 1 |
| Developer | Script Engine | Little Forge Digital |
FAQ
Back In Stock! Alert Engine and Notifly: common questions
- Is Back In Stock! Alert Engine or Notifly cheaper?
- Both list a free plan. Paid plans start at $4/month for Back In Stock! Alert Engine and $9.99/month for Notifly. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Back In Stock! Alert Engine lists 39 the others don’t mention, such as Abandoned cart, Alert settings, Analytics, Auto-alerts. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 9, 2026 for Back In Stock! Alert Engine, Oct 24, 2026 for Notifly; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 9, 2026 for Back In Stock! Alert Engine, Oct 24, 2026 for Notifly. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.