Systems, methods, and other embodiments associated with software identifier based correlation are described. One example system includes an identifier data store to store a first identifier that uniquely identifies a discovered instance of a software title installed in an enterprise. The first identifier is discoverable from the discovered instance and may be provided by a discovery logic. The second identifier identifies a known instance of a software title associated with the enterprise and is provided from an enterprise resource planning (ERP) data store by an ERP logic. The example system may also include a correlation logic to identify a correlation between the discovered instance and the known instance based on a relationship between the identifiers. The example system may also include an update logic to selectively update a value in the ERP data store based on the correlation.