Unique properties let you identify people by something other than their email address, like a username, customer ID, or account number. When you create a custom property with the Unique characteristic, each value can belong to only one person in your workspace. This is useful for companies where participant emails are unavailable or aren't the preferred identifier.

Set up a unique property

In Settings, select Properties (under Data), then select New Property. Choose the Text type and select Unique under Characteristics. For full steps, see Properties.

• Only Text properties can be unique.

• Unique can only be turned on when you create the property, and it can't be turned off afterward.

• Unique properties can't have a default value.

• You can have up to 10 unique properties per workspace.

• If you try to give someone a value that another person already has, Rally won't save it.

Why use unique properties

• Accurate, consistent records: Each ID belongs to one person, which prevents duplicates and misattributed data as your panel grows. It also keeps people's history consistent across studies and populations.

• Privacy: Identifying people by an internal ID instead of their email address reduces how often personal information is shared or exposed. If the ID itself is sensitive, mark the property as PII so it's hidden from roles that can't view PII.

• Flexibility: Unlike email addresses, which can change or be unavailable, a unique property can hold whatever identifier fits your company, such as usernames, numeric IDs, or customer IDs.

• Integrations: When you import a CSV or sync from Salesforce or Snowflake, you can match people by a unique property instead of email. This also works for data from analytics tools like Amplitude: export a CSV with user IDs and import it into Rally.