You can enable Klaviyo Integration on the Pro plan & above. Simply navigate to Settings > Integrations then turn on Klaviyo.

You will then need to add your API key & the name of the default campaign to send emails to.

Enabling the Klaviyo integration under Site Settings will make it easy to use the integration with all our apps.

We support the syncing of Custom Fields for Klaviyo through our Custom Field Sync feature, you can set this up via the Custom Field Mapping button when setting up the integration.

Once you've activated your integration with Klaviyo you can use Subscribe actions to send emails to any list that you want.

You can send phone numbers to Klaviyo using our Custom Field Sync feature.

First, you will need to add the Phone Custom Field to your campaign in the User Details tab.

You can then select Setup under Custom Field Mapping in your Subscribe action and map your Phone field to phone_number.

You will also need to create a new field called sms_consent by following these steps:

1. Select Add Field under Custom Field Mapping and name it sms_consent.
2. Select Add Custom Value under the mapping dropdown selection and set the value as true.

Your Custom Field Mapping should look like this:

You can then ask users to provide their phone numbers to enter your campaign and grow your SMS list.

In order to test if emails successfully send to Klaviyo you need to do the following:

• Have a competition created with a Subscribe action
• Ensure that this action is linked to an existing list in Klaviyo
• Enter the action manually from your competition dashboard
• The action will become invalidated (since we automatically invalidate admin actions)
• Go to the Actions tab for that competition, then make your action valid
• It should appear in Klaviyo within a few minutes
• If your list requires double opt-in, the user will not appear in the list until they have completed the double opt-in.

You can integrate Klaviyo with our Capture app and send users to Klaviyo lists from your email opt-in forms.

To integrate Klaviyo with Capture you need to go to the Email Integrations tab when creating a Capture and select Klaviyo.