How to Migrate from Mailchimp to Klaviyo (Step-by-Step)

Migrating your email marketing data from Mailchimp to Klaviyo can be a complex process, but with the right approach, you can ensure a safe and successful transfer of your valuable customer information. In this guide, we will walk you through the steps to migrate your data, including purchase history and segments, which are crucial for personalized marketing campaigns.

Pre-Migration Checklist

  • Backup Mailchimp data (Export as CSV/JSON): This step is crucial to prevent data loss in case something goes wrong during the migration process. You can export your data from Mailchimp by going to Settings > Data Management > Export. Choose the format that suits your needs, either CSV or JSON.
  • Create Klaviyo account (Trial/Paid): Before starting the migration, make sure you have a Klaviyo account. You can sign up for a trial or paid plan, depending on your business needs.
  • Map your fields (e.g., “Deal Name” in Mailchimp = “Opportunity” in Klaviyo): Field mapping is essential to ensure that your data is transferred correctly. Take the time to review both Mailchimp and Klaviyo’s field structures and map them accordingly. For example, Mailchimp’s “Deal Name” field might correspond to Klaviyo’s “Opportunity” field.
  • Inform your team of downtime: It’s essential to notify your team about the potential downtime during the migration process to avoid any disruptions to your marketing activities.

Method 1: The “One-Click” Importer (If available)

Klaviyo occasionally offers a native import tool for Mailchimp users. To check if this feature is available, follow these steps:

  1. Log in to your Klaviyo account.
  2. Navigate to Settings > Import.
  3. Look for the “Mailchimp Import” option. If the one-click importer is available, you can use it to simplify the migration process. However, this method might not be available at all times, so it’s crucial to have a backup plan.

Method 2: Manual CSV Export/Import (The Reliable Way)

  1. Export from Mailchimp: Go to Settings > Data Management > Export and choose the CSV format. This will download a CSV file containing your Mailchimp data.
  2. Clean the Data: Open the exported CSV file in Excel and remove any empty rows to ensure data integrity.
  3. Import to Klaviyo: Navigate to Settings > Import > CSV in your Klaviyo account and upload the cleaned CSV file.
  4. Map Fields: During the import process, make sure to map the columns from your Mailchimp data to the corresponding fields in Klaviyo. This step is critical to ensure that your data is transferred correctly.

Critical: What DOESN’T Transfer?

When migrating from Mailchimp to Klaviyo, some data might not be transferred automatically, including:

  • Notes: These are typically not transferred through the standard import process. You can manually re-enter notes in Klaviyo or use the Klaviyo API to transfer them programmatically.
  • File attachments: Attachments are not transferred during the import process. You will need to re-upload them in Klaviyo or use a third-party service to transfer them.
  • Activity logs: These logs are specific to Mailchimp and might not be transferred to Klaviyo. You can use the Klaviyo API to fetch activity data from Mailchimp and transfer it to Klaviyo.

Post-Migration Testing

After completing the migration, it’s essential to verify that your data has been transferred correctly:

  • Verify record counts: Check that the number of leads in Klaviyo matches the number of leads you had in Mailchimp. For example, if you had 500 leads in Mailchimp, you should have 500 leads in Klaviyo.
  • Check standard and custom fields: Review both standard fields (e.g., email, name) and custom fields (e.g., purchase history, segments) to ensure they have been transferred correctly.

FAQ

Q: How long does this take? A: The migration time depends on the size of your dataset. For 1,000 records, the process typically takes around 15-30 minutes. For 10,000 records, it may take around 2-4 hours. Keep in mind that these estimates may vary depending on the complexity of your data and the method you choose.

Q: Will I lose my SEO/History? A: When migrating from Mailchimp to Klaviyo, you will not lose your SEO history, as SEO data is not stored within Mailchimp or Klaviyo. However, you may lose some historical data, such as email open rates and click-through rates, if you don’t transfer them manually or via API. To minimize data loss, make sure to export your historical data from Mailchimp before migrating to Klaviyo.

📚 Continue Learning

Check out our guides on Mailchimp and Klaviyo.