How to Connect OptinMonster with Klaviyo

OptinMonster offers seamless integration with the Klaviyo email marketing service. Connecting OptinMonster to your Klaviyo email list is very easy. Follow our step by step guide on how to connect OptinMonster with your Klaviyo account.

  1. Integrations Tab
  2. Log into Your Klaviyo Account
  3. Create or Copy the Klaviyo API Key
  4. Enter the API Key
  5. Select a List
REQUIREMENT: Our native Klaviyo integration requires a Plus subscription. However, you can still use our Custom HTML integration with a lower subscription.

Step 1 – Integrations Tab

If you’re uncertain how to add your integration, you can follow our guide for connecting to Email Service Providers and CRMs.

Next, select Klaviyo from the Email Provider drop-down.

Klaviyo Integration

Step 2 – Log into Your Klaviyo Account

To obtain your Klaviyo API credentials, log into your Klaviyo dashboard and navigate to your Account page from the dropdown menu next to your avatar and name.

Click Account

On the Account page, you will need to select the API Keys link under the Settings drop-down menu.

Click API Keys

Step 3 – Create or Copy the Klaviyo API Key

If you haven’t already created a specific API Key you wish to use, select the Create API Key button.

Click Create API Keys

When creating a new API Key, go ahead and give it a proper Label as well so you can easily identify where you’re using the API Key in the future. Select the pencil icon under the Label column:

Add Label to API Key

A popup will appear for you to enter the API Key label. When you’re finished, select the Save API Key button.

Click Save API Key

Now that you have an API Key ready, copy it and return to the Campaign Builder.

Step 4 – Enter the API Key

In the Campaign Builder, paste your API Key into the corresponding field. Don’t forget to add a unique label for easy identification! Then, select the Connect to Klaviyo button.

Connect to Klaviyo

Step 5 – Select a List

OptinMonster will now connect to your Klaviyo account and fetch your email lists. Select an email list you want users to subscribe to.

Klaviyo Email Lists

That’s all, you have successfully connected OptinMonster to your Klaviyo account!

Ready to make your campaigns live? See our guide on how to embed your campaigns to your website!


Frequently Asked Questions

Q: How do I configure single or double opt-in?

A: See our guide on single vs. double opt-in for Klaviyo.


Q: Is it possible for me to add a phone field to my campaign?

A: Yes! You can add a phone field. Check out how to capture phone numbers with OptinMonster here.


Q: How can I send the referral URL with the lead so I know on what page the visitor signed up?

A: This happens automatically. In Klaviyo, this will be in a custom property called referrer.