Merging 2 Shopify stores for US and CA into 1 Shopify store with 2 markets

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I’m helping a client with 2 Shopify stores setup with 1 for CA and 1 for USA, currently paying for 2 plans

They are building a new store with 2 markets instead within the CA store, so they only need to pay for 1 plan.

The domain for CA is set to the main domain name, while the USA store has a us. subdomain.

Their Klaviyo is only connected to their CA store only because they did not know how to connect 2 stores in 1 integration (you can’t, you need 2 paid acounts).

They want to move all the customer profiles from the USA store plan to the CA store plan, then sync all customers back to Klaviyo to make sure nothing is missing once they launch the new site on the CA store.

Is it possible? How does that work?

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Hi @SolutionG

That’s a great question, and I totally get why your client wants to simplify things by merging their two stores into one with separate markets—it saves on costs and makes management easier. Let’s go over how to move everything smoothly.

Understanding the Case

Right now, your client has two Shopify stores—one for Canada (CA) and one for the USA (US), each with its own plan. They’re switching to a single store (CA) with Shopify Markets handling both regions. Their main domain is for CA, while the US store currently uses a us. subdomain. Plus, their Klaviyo account is only connected to the CA store, so they need to make sure customer profiles from the US store move properly.

Solution: Migrating Customers & Klaviyo Sync

Yes, this is totally possible, but there are a few steps to ensure no data is lost when moving customers and syncing everything back to Klaviyo.

Step 1: Export Customers from the USA Store

Shopify allows you to export customer data as a CSV file.

  1. In the USA store, go to Customers > Click Export
  2. Choose All Customers and CSV for Excel, Numbers, or other spreadsheet programs
  3. Download the file

Step 2: Clean Up & Prepare Data

Before importing to the CA store, you’ll want to check and clean up the data:

  • Remove duplicate customers (some might exist in both stores)
  • Ensure emails, phone numbers, and addresses are correctly formatted
  • If you have customer tags, keep them for segmentation

Step 3: Import Customers into the CA Store

Now, upload the cleaned CSV into the CA store:

  1. Go to the CA store admin > Customers
  2. Click Import customers
  3. Upload the CSV and confirm

:pushpin: Note: Shopify will not transfer passwords since they are encrypted. Customers will need to reset their passwords when logging into the new store.

Step 4: Sync Customers to Klaviyo

Since Klaviyo is only linked to the CA store, you’ll now want to sync these newly imported customers:

  1. In Klaviyo, go to Integrations > Shopify
  2. Click Sync to pull in the latest customer data
  3. Check the Profiles tab in Klaviyo to ensure all US customers have been added

If you want to tag US customers separately in Klaviyo, you can add a column in your CSV (e.g., Market: US) before import, and then create a segment based on that.

Handling the Domain (Optional)

Since the US store was using a us. subdomain, you can keep that as a redirect or link it to a market-specific experience in Shopify Markets.

Final Thoughts

Yes, migrating is possible, but the key is:

  • Export, clean, and re-import customers carefully
  • Sync with Klaviyo properly to ensure all profiles carry over
  • Communicate with customers (especially US ones) about the transition

If you need extra help, just let me know asap. Thanks
Daisy

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We’ve recently done this on 4 separate occasions. our process is now designed to ensure everything is merged under one shop and im happy to offer a free consultation to anyone who is interested.

Our mist complex project including several apps that also required careful migration:

We migrated the data/subscriptions/loyalty points/order history and customer accounts from the ‘smaller’ store into the ‘bigger store’ through a long list of step-by-step tasks that including exporting data, preparing import sheets, and then making sure that the destination store (i.e. the bigger one) is ready for the import. It’s not a small feat but definitely worth the hassle when considering how much easier your life is right after. Drop me a message on linkedin if you’re still thinking of doing this https://www.linkedin.com/in/matthiascamilleri/

our prices range from €8,000 + depending in complexity. Happy to chat!