StockUnison - 2026 Pricing, Features, Reviews & Alternatives

StockUnison is a Shopify-embedded app that performs one-way inventory synchronisation between a merchant's own Shopify stores.

HOW IT WORKS. You nominate one source store and connect any number of destination stores. Products are matched by SKU. When inventory changes on the source, the matched destination variants are updated to follow it.

MATCHING. Matching is SKU-exact. Where a SKU is ambiguous - duplicated across variants, or missing altogether - StockUnison records the conflict and skips it rather than picking a candidate. Every skip appears in the report with its reason.

DRY RUN. Any pair can be run in dry-run mode, which performs the full comparison and produces the complete list of intended writes without sending any of them. Dry run is available on every plan, including Free.

DRIFT DETECTION. A drift check compares source and destination on demand and reports every variant whose counts have diverged, so a silent divergence surfaces as a report rather than as an oversell.

AUDIT LOG. Every run records what was compared, what was written and what was skipped, with reasons. The log is the record of exactly what the app did to your store.

BOUNDARIES, BY DESIGN. StockUnison never creates products, never deletes products, and never writes back to the source store.

INTEGRATION AND SECURITY. Built on the Shopify Admin GraphQL API using Shopify OAuth, requesting only the scopes needed to read products and write inventory levels. Billing runs through Shopify's billing API, so StockUnison never handles card data. Destination stores are connected with a join code, so the owner of a destination explicitly opts in before anything can write to it.

DEPLOYMENT. Cloud-hosted and embedded in the Shopify admin. There is nothing to install beyond the app itself.