---
title: "Sync signups to your Shopify customers"
description: "Add every back in stock signup to your Shopify Customers list, tagged, automatically."
url: https://help.stoqapp.com/back-in-stock/sync-visitors-to-shopify-customers/
product: "Back in Stock"
section: "Integrations / Marketing tools"
last_updated: 2026-09-28
---

# Sync signups to your Shopify customers

> Add every back in stock signup to your Shopify Customers list, tagged, automatically.

STOQ can add each customer who signs up for a back in stock alert to your Shopify **Customers** list, tagged, moments after they submit the "Notify me" form. Use this if you want signups visible and tagged in Shopify admin without exporting anything. No API key needed.

## Before you begin

The Shopify sync toggle requires a paid STOQ plan. On the free plan it's disabled with an upgrade prompt.

## Set it up

On a phone, this menu is collapsed. In the **Shopify mobile app**, tap the **STOQ** logo at the top of the screen to open it, then choose the section named below. There is no hamburger icon. See [Finding the STOQ menu](https://help.stoqapp.com/general/getting-started-with-stoq/#finding-the-stoq-menu).

1. **Open the Shopify integration**

   1. In the left menu bar of the STOQ app, click **Back in stock alerts**.
   2. Click the **Settings** tab, then open the **Integrations** sub-tab.
   3. Click **See integrations** to open the full **Integrations** page.
   4. Find the **Shopify** card and click **Set up**.

   [Image: The Integrations sub-tab under Back in stock alerts Settings](https://help.stoqapp.com/images/general/inter.png)

   [Image: The Shopify card on the Integrations page](https://help.stoqapp.com/images/general/shopify.png)

2. **Turn on the sync toggle**

   Enable **Sync visitors with Shopify**.

   [Image: The Sync visitors with Shopify setting showing Off with a Turn on button](https://help.stoqapp.com/images/general/shopifyon.png)

3. **Set a profile tag (optional)**

   Enter a tag in the **Profile tags** field, for example `back-in-stock-signup`. This tag is shared across Shopify, Klaviyo, Mailchimp, and Omnisend, so it's the same value no matter which you turn on.

   [Image: The Profile tags field](https://help.stoqapp.com/images/general/tagsss.png)

Visitors and buyers are added to your Shopify Customers list as soon as they register for an alert. If you also collect [marketing consent](https://help.stoqapp.com/back-in-stock/notify-me-mailing-list-optin/) on the signup form, the customer's opt-in choice is recorded as their Shopify marketing consent.

## Check your setup

1. Sign up for a restock alert yourself with a test email. See [Test back in stock alerts](https://help.stoqapp.com/back-in-stock/test-back-in-stock-alerts/).
2. In Shopify admin, go to **Customers**, search for the test email, and confirm it's there with your profile tag applied.

## FAQ

### Does this sync my existing waitlist too?

No. Only new signups sync automatically, from the moment you turn the toggle on. Contact STOQ support to backfill existing customers. If you send back in stock emails through Shopify Flow, STOQ also adds each waiting customer to Shopify when their alert goes out.

### Does a customer need to opt in to marketing first?

No. Every signup is added. Consent only affects whether the customer is recorded as accepting marketing.

### The toggle is greyed out

It's a paid-plan feature. Upgrade to unlock it.

### Why did the toggle turn on by itself?

Selecting **Shopify Flow** as your back in stock email platform turns it on, because Flow needs a Shopify customer to act on. You can turn it off again. Alerts sent through Flow keep working, because STOQ adds each notified customer to Shopify just before firing the trigger. See [Automate with Shopify Flow](https://help.stoqapp.com/back-in-stock/back-in-stock-with-shopify-flow/#route-the-restock-email-through-flow).

## Related guides

- [Sync signups to your marketing tool](https://help.stoqapp.com/back-in-stock/sync-signups-to-marketing-tools/): Overview of every sync destination.
- [Let customers join your mailing list](https://help.stoqapp.com/back-in-stock/notify-me-mailing-list-optin/): Add a marketing consent checkbox to the signup form.