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Anonymous activity

Before you identify a profile, calls you make to the SDK are associated with an anonymousId. When you identify that profile, we reconcile their anonymous activity with the identified profile.

In Customer.io, you’ll see anonymous activity in the Activity Log, but we don’t surface anonymous profiles in Customer.io. You won’t be able to find an “anonymous profile” in your workspace, and an anonymous profile can’t trigger automations or get messages (including push notifications) from Customer.io.

When you identify a profile, we merge anonymous activity with the identified profile. And then the identified profile’s previously-anonymous activity can trigger automations and cause your audience to receive messages.

For example, imagine that you have an ecommerce app, and you want to message people who view a specific product. An anonymous user looks at the product in question, goes to a different page, and then logs into your app. When they log in, we merge their anonymous activity including their screen view. This triggers the automation you set up for people who visited the product page.

flowchart LR a(Anonymous user<br>opens app) a-->|track calls|z subgraph z [Anonymous activity] direction LR u(anonymous page view) y(anonymous event) end subgraph f [User profile] direction LR g(screen view) h(event) end z-->|<b>User logs in:</b> Ientify call <br>merges events to profile|f f-->i{Did events happen<br>in past 72 hours?} i-->|yes|j(Events<br>trigger automations) i-.->|no|k(Events do not<br>trigger automations)
Updated August 20, 2026