Systems and methods to match identifiers

A non-transitory computer storage medium storing instructions configured to instruct a computing device to at least:

• store, in the computing device, mapping data generated from matching first user data configured to track first online activities of users and second user data configured to track second online activities of the users, the mapping data identifying mapping between user identifiers and account identifiers, wherein the user identifiers are identified in the first user data, and the account identifiers are identified in the second user data;
• receive, in the computing device, a query identifying a first user identifier;
• determine, by the computing device, a first account identifier based on the mapping data and the first user identifier;
• identify, by the computing device, a transaction profile generated based on transaction data in one or more payment accounts associated with the first account identifier;
• and
• provide, by the computing device, the transaction profile as a response to the query.

A system, comprising:

• at least one microprocessor;
• and
• memory storing instructions configured to instruct the at least one microprocessor to at least:
• store, in the computing device, mapping data generated from matching first user data configured to track first online activities of users and second user data configured to track second online activities of the users, the mapping data identifying mapping between user identifiers and account identifiers, wherein the user identifiers are identified in the first user data, and the account identifiers are identified in the second user data;
• receive, in the computing device, a query identifying a first user identifier;
• determine, by the computing device, a first account identifier based on the mapping data and the first user identifier;
• identify, by the computing device, a transaction profile generated based on transaction data in one or more payment accounts associated with the first account identifier;
• and
• provide, by the computing device, the transaction profile as a response to the query.