Create/update MailerLite subscribers from new Squarespace form submissions

First, we need to connect Squarespace and MailerLite to Zapier.

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  Create Zapier account.

  Create Zapier account if you don't have one.

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  Connect Squarespace to Zapier.

  Give Zapier access to your Squarespace account, using Squarespace credentials.

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  Connect MailerLite to Zapier.

  Give Zapier access to your MailerLite account, using MailerLite credentials.

Next, we need to create a workflow automation scenario using graphical no-code web interface of Zapier.

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  Set up a Trigger action for Squarespace

  Choose the following trigger: New Form Submission (Triggers when form submission is submitted.).

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  Then set up an Action for MailerLite

  Choose this action: Create/Update Subscriber (Creates a new subscriber or updates the existing by email address.).

Finally, we need to test this automation and publish it.

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  Customize data flow

  Configure the data that is exchanged between Squarespace and MailerLite.

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  Test the workflow and turn it on for production use

  Test your scenario and publish to production. Now you have an automatic workflow, that will Create/update MailerLite subscribers from new Squarespace form submissions!