How to Connect OptinMonster with MailerLite

OptinMonster offers seamless integration with MailerLite email marketing service. Connecting OptinMonster to your MailerLite email list is very easy.

In this article, you’ll learn how to connect MailerLite with OptinMonster.

Before You Start

Here are some things to know before you begin:

  •  As a best practice, we recommend you also connect your campaigns to Monster Leads as a backup.

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Connect MailerLite

When you create a campaign in OptinMonster that you intend to collect leads with you’ll want to integrate with one or more services to send those leads to.

To send leads to MailerLite, follow these steps:

  1. Navigate to the Integrations view and click Add New Integration.
  2. Search for and select MailerLite from the dropdown field.
    integration dropdown choose mailerlite
  3. Log into your MailerLite account to obtain your API Key. To do this:
    1. In your MailerLite account navigate to the Integrations page.
    2. Next, click the Use button for the Developer API option in the list of Integrations.
    3. Copy your MailerLite API Key.
  4. Returning to the OptinMonster campaign builder, paste your API Key into the corresponding field.
    Don’t forget to add a unique label for easy identification (internal use only).
  5. Next, select the Connect to MailerLite button.
  6. Once connected, select the email provider group you want to add new subscribers to.
  7. When you are finished, click Save.

Email Automations

To send emails automatically to new leads you’ll want to configure email automations within your MailerLite account.

The following guides from MailerLite may be helpful to get started:


How do I configure single or double opt-in?

See our guide on single vs. double opt-in for MailerLite.

I’ve connected my integration and new leads are being added to my list, but OptinMonster shows 0 conversions for my campaign. Why?

Confirm that conversion tracking is turned on for the submit button in your campaign. See our guide on How to Enable Conversion Tracking.

Is it possible for me to add a Phone Field to my campaign?

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