Integrate Poptin with Customer.io

Q: How do I connect them?

In Customer.io, copy the Site ID and API key . Open Segments , click the segment that should receive Poptin leads, and copy the Segment ID from the URL. In Poptin, open the popup → Edit Design → Email and Integrations → Add Integration . Choose Customer.io. Paste Site ID, API key and Segment ID. Click Approve , then Next or Publish Changes . The popup needs name/email fields. Poptin's documented payload is: Name Email Phone Message If the test lead is missing, the Segment ID is the usual culprit. It lives in the URL after you click the segment, not in the segment's display name.

Poptin still asks for a Customer.io Site ID, API key and Segment ID. Paste them on the popup's Email and Integrations panel, Approve, then publish. A successful connection drops an API test lead into that segment.

Source: How to integrate your poptin with Customer.io?, updated 15 November 2024. Product: Poptin, integrations.

Customer.io has moved API credentials around since that screenshot. If Account Settings → Integrations → Customer.io API is gone, look under Data & Integrations / API credentials for a Site ID and API key. The Poptin form has not changed: it still wants those three values.

How do I connect them?

In Customer.io, copy the Site ID and API key.

choosing Customer.io API for the Poptin integration on colorful background

Open Segments, click the segment that should receive Poptin leads, and copy the Segment ID from the URL.
In Poptin, open the popup → Edit Design → Email and Integrations → Add Integration.
Choose Customer.io. Paste Site ID, API key and Segment ID.

Filling the Site ID, API Key, and Segment ID for the integration

Click Approve, then Next or Publish Changes.

The popup needs name/email fields. Poptin's documented payload is:

Name
Email
Phone
Message

If the test lead is missing, the Segment ID is the usual culprit. It lives in the URL after you click the segment, not in the segment's display name.

Written and reviewed by

Emel Dalabasmaz

SEO Executive at Flatart

Emel Dalabasmaz graduated in Advertising and Public Relations from Anadolu University. She began in social media and carried that grounding — content, brand communication and performance — into SEO. For more than ten years she has worked on growth for brands across a range of industries, pairing a communications perspective with data and technical analysis to build a digital presence that holds up over time.

Education: Advertising and Public Relations, Anadolu University
Writes about: Popup builders, Conversion rate optimization, On-site messaging, SaaS pricing research, SEO, Technical SEO, Content strategy, Digital marketing