MTUs are Monthly Tracked Users
Monthly tracked users are calculated based on the number of unique
user_ids plus unique
anonymous_ids that appear in any call to Segment in a given month. Object-based sources do not count towards your MTU count.
We only count users once per month, even if they perform multiple actions across your sources.
What about object-based sources?
Object-based Sources (like Salesforce, Zendesk, and Stripe) don’t impact your MTU counts because there are no IDs. However they do impact your overall object count.
And event based cloud-app sources?
Event based (mostly email sources like Klaviyo, Vero, Drip, etc.) do create MTUs because they have IDs associated.