While Klaviyo does not have a built-in integration with JustUno, you can still integrate your JustUno account with Klaviyo. This is possible via an integration available through JustUno.
Before you get started, you must already have existing lists in your Klaviyo account that you are hoping to connect to JustUno.
Add the JustUno Integration
First, you will need to generate a private API Key in Klaviyo to use with JustUno. In your account, click Account in the upper right-hand corner and then navigate to Settings > API Keys.
Once you've generated a private API key, you'll copy it and paste it into Justuno. To do this, log into your Justuno account and click Promotions and then select Edit Integrations next to the desired Promotion.
On the App Integration tab, locate and click on the Klaviyo Connect button to launch the configuration options. From there, enter your API Key and select a Klaviyo campaign and click Save.
After you select which list you'd like your signups to be added to, your Justuno account will now sync new signups to this selected Klaviyo list as they come in.
Data Synced to Klaviyo
From Justuno, Klaviyo pulls in your subscribers to the list you've specified in JustUno.