Customer.io

Segment destination

Updated August 20, 2026

Getting started

  1. Go to Data & Integrations > Integrations and select the Segment entry in the Directory tab.
  2. (Optional) Select the data sources that you want to connect to your outbound integration. You can always connect data sources later. We'll only show you data sources that work with your integration.
  3. Configure your integration.
    1. Source Write Key: The **Write Key** of a Segment source.
    2. Endpoint Region: The region to send your data.
  4. Click Enable Destination.

Actions

When you're done setting things up, you can go to the Actions tab to see how we map incoming data to your integration.

You may need to add actions for this integration

While we often have default triggers for actions, we don't always add those actions as defaults. You may need to add actions to make sure that you're sending all the data that you want to send to your integration. See our actions page for help setting up actions.

ActionDefault TriggerDescription
Send Identifytype = "identify"

Send an identify call to Segment’s tracking API. This is used to tie your users to their actions and record traits about them.

Send Grouptype = "group"

Send a group call to Segment’s tracking API. This is used to associate an individual user with a group

Send Screentype = "screen"

Send a screen call to Segment’s tracking API. This is used to track mobile app screen views.

Send Pagetype = "page"

Send a page call to Segment’s tracking API. This is used to track website page views.

Send Tracktype = "track"

Send a track call to Segment’s tracking API. This is used to record actions your users perform.