
Klaviyo is an e-commerce marketing platform that helps businesses manage and optimize their email and SMS marketing efforts to drive sales and customer engagement.
Open your form, then go to Integrate and click Klaviyo.

<aside> ☑️ Important: When creating your form, make sure to set the email, name, and other fields you would like to link to your Klaviyo list to required.
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Enter your Private API Key. Click the link in the banner to get redirected to the page containing the key. Create Private API Key in the new tab. Enter a name and choose Full Access Key.

Then, select a List in Klaviyo you’d like to connect to.
Match the fields in your Fillout form to the corresponding fields in your Klaviyo audience. For example, link the email address to its respective field.

You can use other Fields, such as name, number, address, and more in your form to update your contacts' details.
Once everything is set, click Finish setup. After publishing, answers to mapped fields from new submissions will appear in your Klaviyo audience list. If a contact with the provided email address already exists, Fillout will automatically update the existing contact's information.