How to Integrate OptinMonster with Constant Contact
From Integrations, select Constant Contact, register the app, allow access, name the connection, pick a list, save. Works on every OptinMonster plan.
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OptinMonster Integrations 2026
Connect OptinMonster to Mailchimp, Constant Contact, Brevo (the Integrations card no longer says Sendinblue), WooCommerce, WPForms or Marketo. Marketo is not on the 2026 pricing grid; the old docs URL 404s.
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How to Integrate OptinMonster with WooCommerce
Growth plan only. In WordPress: OptinMonster → Settings → Auto-Generate Keys + Connect WooCommerce. You need Shop Manager or Administrator.
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ReadHow to Integrate OptinMonster with SendinBlue
Sendinblue rebranded to Brevo. In OptinMonster, search Integrations for Brevo, paste an API key, pick a list, save. Coupon-wheel fields are not sent.
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ReadHow to Create a Popup with OptinMonster & WPForms
Publish a WPForms form, assign the WordPress site in OptinMonster's Publish view, drop the WPForms block, pick the form. It will not show in the builder canvas.
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ReadHow to Integrate OptinMonster with Marketo
Create a Marketo custom service, copy Client ID, Client Secret and the REST subdomain, paste them into OptinMonster Integrations, pick a partition and a list.
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ReadHow to Integrate OptinMonster with Mailchimp
Integrations view, Mailchimp, paste an API key, pick an Audience. Double opt-in is on by default. Groups can be automatic or shown as checkboxes.
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