How to Send Ninja Forms Submissions to Customer.io

Customer.io is a marketing automation platform. Getting Ninja Forms data into Customer.io does not require external tools. Advanced Form Integration handles it natively, and this guide covers every step.

Skip the automation middleman

Rather than routing data through a third-party cloud, AFI sends it directly from your WordPress server to Customer.io. No task meter, no monthly bill.

What you will need

• A WordPress site with Ninja Forms installed and at least one form.
• A Customer.io account.
• The Advanced Form Integration plugin (free from WordPress.org).

Connect Customer.io to AFI

1. Log in to your Customer.io account.
2. Go to Settings → API Credentials and copy your Site ID and API Key.
3. In WordPress, go to AFI → Settings → Customer.io.
4. Enter the Site ID and API Key, then click Save Changes.

Setting up the integration

1. Create a new integration

Go to AFI → Add New. Name it Ninja Forms to Customer.io.

2. Pick your trigger

Select Ninja Forms as the form provider and choose the form you want to connect. AFI detects the fields automatically.

3. Select Customer.io as the destination

Choose Customer.io from the platform dropdown and pick Add Customer. This creates or updates a customer in Customer.io.

4. Map fields

Match each Customer.io field on the left to the corresponding Ninja Forms field on the right. You can also use smart tags like {{_submission_date}} and {{utm_source}}.

5. Add conditions if needed

Only want to send certain submissions? Set up a conditional rule based on any form field value.

6. Save and test

Click Save Integration. Fill out your Ninja form and submit. Check Customer.io to confirm the data arrived. If anything looks wrong, open AFI → Log to see the exact request and response.

Free vs Pro

The free version maps email, name, and standard attributes to Customer.io with unlimited submissions. Pro adds custom attributes and event tracking. No per-submission fees on any plan.

Frequently asked questions

Do I need coding skills?

No. Everything is configured through a visual interface, including field mapping.

Will adding this slow down my form?

No. AFI sends data to the destination after the form submission completes. Your visitors see the normal success message without any delay.

Can I connect multiple Ninja Forms?

Yes. Create a separate integration for each form, or send one form to multiple platforms.

Get started

Install Advanced Form Integration free from WordPress.org and connect Ninja Forms to Customer.io in minutes.