New leads join your list - always with a confirmation email (double opt-in). Nobody who does not confirm gets your newsletter.
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All marketing integrations use double opt-in: a lead gets a confirmation email and only joins your list after clicking. That keeps sign-ups GDPR-compliant, even if someone only asked a question in the chat.
Mailchimp
1
In Mailchimp open Profile, Extras, API keys, and create a key.
2
Copy the audience ID (Audience, Settings, “Audience name and defaults”).
3
In the dashboard open Integrations and click Mailchimp.
What happens: New leads get a confirmation email from Mailchimp. Only those who confirm become subscribers.
Klaviyo
1
In Klaviyo open Settings, API keys, and create a private key with write access to lists and profiles.
2
Copy the list ID. Use a list with double opt-in.
3
In the dashboard open Integrations and click Klaviyo.
What happens: New leads subscribe through the list; with double opt-in Klaviyo sends the confirmation email.
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Good to know: Check in Klaviyo that the list uses double opt-in - only then is the sign-up properly confirmed.
Brevo
1
In Brevo open SMTP & API, API keys, and create a key.
2
Note the list ID and create a double opt-in template under Templates (note its ID).
3
In the dashboard open Integrations and click Brevo.
4
Enter key, list ID, template ID and the page after confirmation.
What happens: New leads get your confirmation email; after the click they join the list.
MailerLite
1
In MailerLite open Integrations, API, and create a token.
2
Turn on double opt-in for API sign-ups.
3
Copy the group ID (Subscribers, Groups, open the group).
4
In the dashboard open Integrations and click MailerLite.
5
Enter token and group ID.
What happens: New leads join the group unconfirmed and get the confirmation email.
GetResponse
1
In GetResponse open Tools, Integrations & API, API, and create a key.
2
Open the list, settings, copy the list token and turn on double opt-in.
3
In the dashboard open Integrations and click GetResponse.
What happens: New leads are signed up and confirm by email.
Kit
1
In Kit open Settings, Advanced, API, and copy the API key (v3).
2
Open the sign-up form and copy its ID from the URL. Keep the confirmation email on.
3
In the dashboard open Integrations and click Kit.
What happens: New leads subscribe through the form and get the confirmation email.
CleverReach
1
In CleverReach open Account, Extras, REST API, and create an OAuth app. Copy client ID and client secret.
2
Under Forms, create a form with a double opt-in template and note its number.
3
Note the number of the recipient list (group).
4
In the dashboard open Integrations and click CleverReach.
5
Enter client ID, client secret, group ID and form ID.
What happens: New leads land on the list as inactive and receive your form's confirmation email. They only become active after clicking.
rapidmail
1
In rapidmail open Settings, API, and create an API user.
2
Note the number of the recipient list.
3
In the dashboard open Integrations and click rapidmail.
4
Enter API username, API password and list ID.
What happens: New leads get rapidmail's activation email and only become active on the list after clicking. If someone is already on it, nothing happens.
