10. A system comprising: a comparing engine to compare, using one or more processors, a first search result with a second search result to automatically identify from the first search result at least one data item that is new or modified as compared to the second search result, the first search result comprising a first set of data items satisfying a first set of user-specific search criteria and the second search result comprising a second set of data items satisfying a second set of user-specific search criteria; and a notification engine to send a notification of a result of the comparing to a user device.
15. The system of claim 10 , wherein at least one of the first search result or the second search result is selected from a plurality of saved searches.