Managers seeking competitive intelligence can use any of the scores of online databases, some of which are free and some for which the user pays. all of the following are sources of competitor information, but one is not an online database. which one is not an online database?
Unfortunately, you didn't share the list of sources of competitor information so it is getting difficult to give the answer which will suit the task. But since you have to choose non-online database the most popular one is internal employee group. Hope that will help you in some measure.