Comparisons
Stock Sync alternative: one checked supplier feed for your store, ERP and warehouse
syncX: Stock Sync is a store app that reads supplier files and APIs into Shopify, BigCommerce, WooCommerce and Wix, configured by you, priced by products, feeds and schedule. Its help center documents clearly how it handles the hard cases. A supplier feed integration from us starts where those documented rules end: priority between suppliers, more targets than the store, and a check on every file before it is used.
What Stock Sync does well
syncX: Stock Sync, made by SyncX, carries Shopify's Built for Shopify badge and had a rating of 4.7 from 924 reviews on its App Store listing on October 3, 2026. It reads CSV, XLSX, XML and JSON and a custom format, over FTP and SFTP, Google Sheets, Google Drive, Dropbox, a download URL or a REST API; the listing counts more than 60 connection methods. Its help center covers Shopify, BigCommerce, WooCommerce and Wix stores, and has ready-made feed setups for dozens of named wholesalers and dropship suppliers.
The tool has rules for the everyday cases, set inside each feed:
- Quantity rules. A supplier's
Ybecomes 1 andNbecomes 0; "in stock" becomes a fixed number such as 5; 5 units or fewer can be treated as 0. - Out-of-stock strategy. Products missing from a feed can be set to 0, and a separate remove feed archives or deletes products that are no longer listed.
- A zero-quantity halt. A threshold between 10% and 100% stops a run that would set that share of the inventory to zero, with a warning in the activity log.
- Preview Sync. On Shopify, a run can calculate its changes without writing them, with a downloadable change log.
- Real-time quantity sync between stores on Shopify, BigCommerce and WooCommerce.
The plans set how much of this you get:
| Plan | Products | Update feeds | Schedule |
|---|---|---|---|
| Free | up to 2,000 | 1 | manual only |
| Starter | 500 to 2,500 | 1 to 5 | once a day |
| Expert | 5,000 to 100,000 | 1 to 25 | up to 24 times a day |
| Scale | unlimited | unlimited | up to every 10 minutes |
The Scale plan also lists custom API integration and setup, and ERP sync. Statements about Stock Sync on this page come from its App Store listing and its help center, read on October 3, 2026.
How its documentation handles the hard cases
Stock Sync's help center is specific about what the app does when a case gets difficult. These are its own answers:
| Case | What Stock Sync documents |
|---|---|
| Two suppliers list the same SKU | the value of the most recent feed is used; a "highest quantity" setting can be enabled for the store; quantities can be added up when one feed runs first and the others add to it; on Shopify each supplier's feed can write to its own inventory location |
| Adding up quantities | works only when every SKU in the later feeds also exists in the first feed; feeds should be scheduled close together, daily rather than hourly |
| A product is missing from the feed | left untouched by default; set to 0 with the out-of-stock strategy; archived or deleted by a remove feed at product level, not per variant |
| The file is not there yet | "ensure the supplier's upload times occur before your feed schedule" |
| Two feeds read the same file | the first feed may rename the file after download; set "After Process" to "Do nothing" |
| Schedule | 15 minutes only for FTP; at least 1 hour for download URLs, REST APIs, Google Sheets and Dropbox |
| Undoing a run | possible for quantity and price only, by uploading the change log as a new feed |
| Expected dates | through a Shopify metafield; the date in the feed must be YYYY-MM-DD |
| An ERP as a source | connected primarily through its REST API, from the API documentation |
| Failure alerts | an email when a run fails, repeated after 2 to 3 failures in a row; no alert for a run with "0 updated" |
Two of these decide most outcomes for a store with several suppliers. The first is the rule for a shared SKU. With three suppliers holding 10, 13 and 15 units of the same item, the store shows 13 if B's feed ran last, 15 with the highest-quantity setting, or 38 when the feeds are added up in the right order.
A lead supplier with fallback, "use A, and B and C only when A is out", is not among the documented options. That rule gives 10 units here, and it is the one a buyer with a preferred supplier usually means.
The second is time. A feed runs on its schedule, and the supplier's file has to be there before it. A supplier export that lands 20 minutes late is read at the next run, which is an hour later on a URL feed and a day later on a daily plan.
What is different in an integration built for your suppliers
| Stock Sync | Integration from SyncMyShop | |
|---|---|---|
| Who sets it up and keeps it working | you configure each feed in the app | we build it, host it, monitor it and change it when a supplier changes |
| Where the data goes | the store, or several stores | the store, the ERP and the warehouse system, from the same checked run |
| Shared SKUs | most recent, highest, added up, or one location per supplier | any rule per product, including a lead supplier with fallback, or the lowest cost with stock |
| File arrival | the schedule runs; a missing file is a failed run | each feed has an expected time; the file is read when its size is stable and an alert goes out when it is late |
| Truncated file | a zero-quantity threshold on the store | row count and size compared with the last run before any row is used, for every target |
| Before go-live | Preview Sync on Shopify | dry run on every target, then approval per feed |
| History | change log per run; undo for quantity and price | diff per run, per product and per field, with the source file archived |
One connection owns a product
Each product belongs to exactly one feed connection, with its priority rule set per product or per brand. A second supplier that starts listing the same SKU cannot overwrite it by running later. The rule also covers your own stock: the count in your warehouse stays leading, and supplier stock fills in only where you have none. How that works is on supplier feeds and stock and availability.
The file is checked before the store is
A supplier export that takes 4 minutes to write 4,160 rows and is read after 2 minutes has about half its rows. In a feed where missing means zero, the other half goes offline. The integration reads a file only after its size has stayed the same, compares the row count with the last run, and holds a run that falls below the threshold for that feed. The same check protects the ERP and the warehouse system, not only the store. The formats and transports it reads are on supported sources.
More than the store
Stock, expected date and cost price from the same checked file go to every system that needs them: available quantity to the store, cost price and expected receipt date to the ERP, availability to the warehouse system. Purchasing and the product page work from the same numbers instead of two imports that drift apart.
Moving from Stock Sync
A move starts with the change logs. They show what each feed currently writes, which settles the mapping and the rules nobody wrote down. The new integration then runs as a dry run next to Stock Sync: both read the same files, only Stock Sync writes, and the differences per SKU are logged. A feed moves when its differences are explained, and Stock Sync's feed for those products is switched off at the same moment, so each product has one owner at every point. The method is in replacing an integration.
Tell us what you run: your store platform, your ERP, and a file from your most difficult supplier.
Frequently asked questions
Is SyncMyShop an app like Stock Sync?
No. Stock Sync is an app you install and configure yourself. We build an integration for your suppliers, your store and your ERP, then host it, monitor it and change it when a supplier changes its file. You get a dashboard with logs, a dry run before go-live and a diff per run, not a feed editor.
Can we keep Stock Sync for some suppliers?
Yes, with one rule: each product has one owner. If Stock Sync and the integration both write stock for the same SKU, the last write wins and the numbers jump between runs. Suppliers are split by product, and a product moves only when its feed moves.
Does the integration write delivery dates as well as quantities?
Yes. The expected date or lead time is read in the supplier's own format, converted, and written to the store and to the expected date on the ERP side. Stock Sync documents expected dates through a Shopify metafield and asks for the date in the feed as YYYY-MM-DD; a converted date in any format is part of the mapping here.
What happens to products that drop out of a supplier file?
That is a rule per feed: keep the last known quantity, set it to zero, or unpublish. Before any of those applies, the file itself is checked for size and row count against the last run, so a truncated file is held and reported instead of being read as hundreds of discontinued products.
How is a custom integration priced compared with Stock Sync?
Stock Sync prices by plan, with limits on products, feeds and how often a feed may run. We charge a fixed price for the build and a monthly fee for hosting and running it, without a count of feeds, products or runs. Tell us what you run and you get a fixed price for your setup.
Tell us what you need
Tell us which systems you use and what needs to work better. We reply personally within one working day. We help you define the work, then agree the price and timing before you commit.
- You know the price and the timeline before you commit to anything
- We work out the connection that takes the work off your hands
- We handle the build, hosting, monitoring and maintenance
- Your team has less information to retype and fewer discrepancies to chase