Question

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?

Answer 1

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.