You will learn how email subscription statuses are seamlessly synchronized between your Shopify store and FosterFlow. Keeping your subscriber data up-to-date across both platforms ensures you are maintaining accurate customer profiles and sending communications only to consented contacts.
Before you begin
If you have not already done so, please follow our guide on getting started with Shopify for step-by-step instructions on setting up your integration.
To ensure the subscription sync functions properly, you must establish a successful pixel connection. Check your integration setup to confirm that the Pixel is listed as Connected and the Theme Embed is Enabled.

Subscription sync from Shopify
Once your Shopify integration is complete and the pixel is active, FosterFlow automatically monitors subscription events on your storefront.
- Real-time monitoring: FosterFlow relies on the active pixel to detect when a customer opts-in to marketing communications (for example, during the checkout process or via a sign-up form). This subscription status is synced to FosterFlow in real-time.
- Viewing synced data: After establishing the pixel connection, wait a short period for the data to process. You can then navigate to Audience > User profiles and refresh the page to see your Shopify customers and their subscription statuses appearing in your database.

Subscription sync from FosterFlow
The synchronization between the platforms is bidirectional. When you send marketing emails to your users through FosterFlow, their engagement is tracked and synced back to Shopify–specifically regarding opt-outs.
- Unsubscribe handling: To maintain deliverability and compliance, FosterFlow requires an unsubscribe link in your communications. When building your email campaigns, you can easily drag and drop FosterFlow’s official Footers components, which come pre-configured with active unsubscribe links.
- Syncing back to Shopify: If a user clicks the unsubscribe link in an email, an unsubscribe event is generated in FosterFlow. FosterFlow captures this event and automatically pushes the updated opt-out status back to Shopify. This ensures your Shopify customer records reflect the most recent consent changes.
