Abstract: Aspects and elements of the present disclosure relate to systems and methods for determining whether a user of an application is a bot, the sequences of computer-executable instructions including instructions that instruct at least one processor to assign the user to a user classification of a plurality of user classifications for the application, provide, responsive to assigning the user to the user classification, one or more challenges of a plurality of challenges to the user over multiple instances of the user using the application, each challenge of the plurality of challenges being configured to determine whether the user is a bot, and each challenge being associated with at least one user classification of the plurality of user classifications, and change the user classification based on the user's response to the one or more challenges.