---
title: "Sync signups to your marketing tool"
description: "Add every back in stock signup to Klaviyo, Mailchimp, Omnisend, or your Shopify customers automatically."
url: https://help.stoqapp.com/back-in-stock/sync-signups-to-marketing-tools/
product: "Back in Stock"
section: "Integrations / Marketing tools"
last_updated: 2026-08-19
---

# Sync signups to your marketing tool

> Add every back in stock signup to Klaviyo, Mailchimp, Omnisend, or your Shopify customers automatically.

STOQ can push each customer who signs up for a back in stock alert to your marketing tool, moments after they submit the "Notify me" form, so you never export anything by hand. Turn on a toggle per tool and every new signup syncs automatically. Pick your destination:

- [Klaviyo](https://help.stoqapp.com/back-in-stock/connect-klaviyo-for-back-in-stock/): Add signups to your Klaviyo account as profiles.
- [Mailchimp](https://help.stoqapp.com/back-in-stock/sync-visitors-to-mailchimp/): Add signups to a Mailchimp audience.
- [Omnisend](https://help.stoqapp.com/back-in-stock/sync-visitors-to-omnisend/): Add signups to your Omnisend contacts.
- [Shopify customers](https://help.stoqapp.com/back-in-stock/sync-visitors-to-shopify-customers/): Add signups to your Shopify Customers list, tagged.

## How it works

- Each destination has its own card on the **Integrations** page (**Back in stock alerts** > **Settings** > **Integrations** sub-tab > **See integrations**). You can turn on any combination, and each signup syncs to every tool you enable.
- Syncing needs a paid plan. Mailchimp and Omnisend also need an API key from that platform; Klaviyo connects with OAuth; Shopify needs nothing extra.
- Only new signups sync, starting when you turn the toggle on. Contact STOQ support to backfill existing customers.
- A shared **Profile tags** value is applied across all four so synced profiles are easy to find.
- If you collect [marketing consent](https://help.stoqapp.com/back-in-stock/notify-me-mailing-list-optin/) on the signup form, each tool treats the profile as subscribed only when the customer opted in. Syncing itself happens regardless of consent.

## Related guides

- [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.
- [Import your waitlist from another app](https://help.stoqapp.com/back-in-stock/import-waitlist/): Bring in customers from another back in stock app by uploading a CSV.
- [Find synced profiles in Klaviyo](https://help.stoqapp.com/back-in-stock/find-klaviyo-synced-profiles/): Segment and organize the profiles STOQ syncs to Klaviyo.