Shelfback vs VynStack ‑ Stock Warden
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Sep 10, 2026 for Shelfback, Oct 13, 2026 for VynStack.
The short answer
- Only VynStack lists a free plan.
Head to head
Starter
- · 50 Corrections / Month
- · Activity Dashboard
- · Activity Logs
- · Automatic Restock Correction
- · Global Protection Toggle
- · Multi-Location Support
Standard
- · Advanced Logs
- · Analytics & Reporting
- · Back-in-Stock Protection
- · Collection Rules
- · Custom Rule Builder
- · Smart Protection
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureSold-out products push shoppers away, and they are easy to miss. Shelfback watches your inventory and keeps out-of-stock products from cluttering your collections, so shoppers see what they can buy. It never drafts, hides, or deletes products, so your product pages and URLs stay intact.
Merchants often forget to uncheck the restock box during refunds, which silently returns sold-out or returned items to available inventory. This causes overselling, false back-in-stock alerts, and customer complaints. Stock Warden watches every refund and automatically corrects these unintended restocks, usually within seconds. It works in the background with no manual steps.
- Automatically move out-of-stock products to the bottom of your collections
- Email alerts when a product sells out, plus an optional daily summary
- See which top-sellers are low or out of stock, ranked by restock priority
- Exclude any product, tag, vendor, or product type so it is never moved
- Automatically reverses accidental inventory restocks created during refunds
- Smart Protection only corrects items that were out of stock before the refund
- Product, collection, and custom rules with full multi-location support
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 |  Shelfback |  VynStack |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Shelfback | VynStack |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
Shelfback and VynStack: common questions
- Is Shelfback or VynStack cheaper?
- Only VynStack lists a free plan. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- 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 Sep 10, 2026 for Shelfback, Oct 13, 2026 for VynStack; 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 Sep 10, 2026 for Shelfback, Oct 13, 2026 for VynStack. 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.