Question

In Twilio Segment, if source events have no userId and use the user’s email address as anonymousId, will Segment Unify merge profiles and will this inflate MTU counts?

Product

Twilio Segment

Environment

Segment Console

Answer

Segment treats anonymousId as an identifier, not as an email trait. If multiple events use the same anonymousId value, those events can be associated with the same profile according to the workspace’s identity resolution settings.

MTU billing is not based on the number of profiles shown in Unify or Engage. Segment counts unique userId values, then adds unique anonymousId values that were not associated with a userId during the billing period. Repeated events with the same anonymousId should not each count as a separate MTU.

For the most reliable identity resolution and MTU behavior, sources should send a stable userId whenever possible.

Additional Information