Trunk ‑ Stock Sync & Bundling vs Variant Stock Sync
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 31, 2026 for Trunk, Oct 14, 2026 for Variant Stock Sync.
The short answer
- Only Variant Stock Sync lists a free plan. Paid plans start at $35/month for Trunk and $9.99/month for Variant Stock Sync.
- Trunk lists 11 features Variant Stock Sync’s listing doesn’t mention, including Auto-updates, Automated alerts, Data import and export.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Essential
- · 14-day free trial
- · Live chat and email support
- · Low stock level alerts
- · Real-time stock level syncing
- · Unlimited sales channels
Pro
- · 14-day free trial
- · Bundling & kitting
- · Duplicate SKU syncing
- · Everything in the Essential plan, plus:
Free
- · Unlimited variants per product
- · Up to 3 products
- · Webhook synchronization (real time)
Pro
- · Email support
- · Unlimited variants per product
- · Up to 50 products
- · Webhook synchronization (real time)
Business
- · Automatic detection by AI
- · Email support
- · Scheduled synchronization (3PL)
- · Unlimited Products
- · Unlimited variants per product
- · Webhook synchronization (real time)
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureNever oversell again and let Trunk give an extra helping hand with your inventory, giving you back the bandwidth to grow and sell on even more places. Connect all your sales channels with Shopify including: multiple Shopify shops, Amazon, Bandcamp, BigCommerce, eBay, Etsy, Faire, QuickBooks Online, Square POS, Squarespace, TikTok, Walmart, Wix, WooCommerce, Xero, and more. Not selling elsewhere?
Sync inventory between product variants sold in different quantities. When a customer buys a pack of 6, stock for packs of 1, 3, and 12 updates automatically. Set a multiplier for each variant, pick a reference, and the app keeps everything in sync via webhooks. Scheduled sync is available for stores using 3PL or external fulfillment providers. Ideal for bundles, multipacks, and wholesale quantities.
- Automatically keeps stock levels synced in real-time between matching SKUs
- Powerful bundling and kitting to track components and materials
- Low stock level alerts to let you know when to replenish your inventory
- Simple and beautiful interface that puts everything at your fingertips
- Multiplier-based stock calculation for any bundle or pack ratio
- Real-time inventory sync between variants via Shopify webhooks
- Scheduled sync for 3PL and external fulfillment workflows
- Multi-location inventory filtering for complex warehouse setups
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 |  Trunk |  Variant Stock Sync |
|---|---|---|
| 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 | Trunk | Variant Stock Sync |
|---|---|---|
| App Store rating | 4.9 ★ | Not published |
| App Store reviews | 408 | Not published |
| New reviews, 28 days | 1 | Not enough data |
| Reviewers a year or more in | 0% | Not enough data |
Pricing
| Measure | Trunk | Variant Stock Sync |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $35/month | $9.99/month(ahead) |
| Longest free trial | 14 days | Not listed |
| Plans listed | 2 | 3 |
Listing
| Measure | Trunk | Variant Stock Sync |
|---|---|---|
| Shopify category rank | #34(ahead) | #214 |
| Shopify App Charts | #5 on Featured by Shopify in Inventory sync | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Aug 29, 2019 | Apr 23, 2026 |
| Languages | 1 | 2 |
| Developer | Trunk | Topicimes |
FAQ
Trunk and Variant Stock Sync: common questions
- Is Trunk or Variant Stock Sync cheaper?
- Only Variant Stock Sync lists a free plan. Paid plans start at $35/month for Trunk and $9.99/month for Variant Stock Sync. 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?
- Trunk lists 11 the others don’t mention, such as Auto-updates, Automated alerts, Data import and export, Email alerts. Variant Stock Sync lists 8 the others don’t mention, such as AI optimization, Bulk processing, Custom, Inventory sync. 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 Oct 31, 2026 for Trunk, Oct 14, 2026 for Variant Stock Sync; 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 Oct 31, 2026 for Trunk, Oct 14, 2026 for Variant Stock Sync. 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.