OptinMonster Documentation

Documentation, Reference Materials, and Tutorials for OptinMonster



How to Connect OptinMonster with Constant Contact

How to Connect OptinMonster with Constant Contact

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

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

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

Connect Constant Contact

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 Constant Contact, follow these steps:

  1. Navigate to the Integrations view in the campaign builder, search for and select Constant Contact.
    Select the Constant Contact integration in OptinMonster.
  2. Next, select the Register Constant Contact button at the top of the integration section to begin authorization.
    Register Constant Contact with OptinMonster.
  3. A new window will open and you’ll be prompted to securely log into your Constant Contact account.
    Login to Constant Contact
  1. Once logged-in, you’ll be asked to allow OptinMonster permission to connect to your Constant Contact account. Select Allow to grant permission.
    Allow access between OptinMonster and Constant Contact
  2. Return to the OptinMonster campaign builder, enter a Constant Contact Account Name (*internal use only), then select the Connect to Contact Contact button.*The Constant Contact Account Name can be anything that helps you identify the specific integration within OptinMonster. It’s possible to add more than one Constant Contact integration to your account and this is an easy way to differentiate between them when assigning integrations to individual campaigns.
  3. Required: Once the Constant Contact integration has been connected select the Constant Contact List you wish to send leads to from the Email Provider Lists field.
  4. When you’re finished, Save your campaign.

Add Extra Fields

Field Mapping

New: Our Constant Contact integration supports Field Mapping, so you can easily add radio buttons, phone fields, text areas, number fields, lists, and more!

Get started using Field Mapping with Constant Contact.

Before you begin using Field Mapping with Constant Contact, please consider the following:

  • Custom fields must be manually created in your Constant Contact account before they can be mapped to in OptinMonster.
  • The following custom fields are reserved in Constant Contact and cannot be mapped to:
  • Custom field names must adhere to one of the following specific formats (where ## is any number between 1-15):
    • custom_field_##
    • CustomField##
  • You can manage your custom fields in Constant Contact following this guide.

Form Embed Block

Alternatively, you can add any Constant Contact webform to your campaign using our Form Embed block.

Get started adding a custom form to your campaign.

Email Automations

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

The following guides from Constant Contact may be helpful to get started:


We strongly recommend you test the optin form before publishing your campaign to ensure it is working as you expect.

Before you begin, please be aware of the following details when testing Constant Contact integrations:

  • Previously submitted or already subscribed leads may be treated differently by Constant Contact than new leads. For this reason, we recommend using a completely unique email address each time you test submit your campaign’s form. You can use a free tool like TempMail.io or learn how to create unlimited unique email addresses from a single Gmail account.
  • If the lead is captured in Constant Contact but you do not receive any automated emails it indicates the integration from OptinMonster to Constant Contact is correct, and the issue is with the automated email configuration. Constant Contact controls email automation exclusively. If you require assistance in troubleshooting email automations we recommend reaching out to Constant Contact support directly.

Get started testing with the Live Site Inspector tool.

Spin-a-Wheel Support

If you are configuring a Gamified spin-to-win campaign, Spin-a-Wheel support is automatically enabled. This will pass the Coupon Label and Coupon Code to Constant Contact as custom fields with each lead.

IMPORTANT: We recommend limiting the Coupon Label and Coupon Code values to no more than 36 characters. Constant Contact’s API limits custom field values to 50 characters total. We store the value as Coupon Label: {label value}, and Coupon Code: {code}. which leaves ~36-37 characters for your coupon label/code.

When viewing individual leads in Constant Contact, you’ll see the coupon won by the lead is sent as custom fields 12 and 13, like this:

Constant Contact Custom Fields

If you’re serious about jumpstarting your website business growth, then get started with OptinMonster today!

Get Started With OptinMonster Today!

BONUS: Done-For-You Campaign Setup ($297 value)
Our conversion experts will design 1 free campaign for you to get maximum results – absolutely FREE! Click here to get started →


Can I send leads to more than one List?

Yes! See our Lead Sharing guide to accomplish this.

How do I configure single or double opt-in?

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

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

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


The campaign is capturing leads but shows 0 conversions in analytics.

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

Still stuck?

How can we help?

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OptinMonster has transformed our business. Before integrating their optins, our clients saw a 2% conversion rate from web traffic, which is slightly above the standard for their industry. With the integration of OptinMonster’s lightbox popup, exit-intent technology, split testing, and other tools, our client’s conversion rates soared by an unprecedented 500%. They attracted substantially more customers while spending less on digital advertising. Their success propelled them to the top of their markets, outperforming national chains and other medical spas with much bigger marketing budgets. Our client’s success in their market has distinguished us in our own. We are now one of the most sought-after marketing firms in the industry of aesthetic medicine. We know that the integration of OptinMonster, more than any other tool or marketing strategy, has supported this growth and achievement.

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Chris Zelig

Partner, Medstar Media

OptinMonster has been a game-changer for us. From driving donations to collecting new leads, there is nothing that this simple tool has failed to accomplish. Our lead collection rate has jumped by over 1,000%.

joe lowe american bird conservancy

Joe Lowe

Director of Digital Communications, American Bird Conservancy

Through OptinMonster’s exit-intent popups, we have more than doubled our sales conversion rate. Best of all is the compound effect of using OptinMonster over a long period of time—more conversions mean more customers, which means more word of mouth.

mitch smith, managing director, shockbyte

Mitch Smith

Managing Director, Shockbyte.com