Top online proctoring tools are platforms that monitor remote exams using AI, webcams, screen tracking, and identity verification to prevent cheating and maintain exam integrity, making online assessments more secure; tools like ProctorU, Examity, Honorlock, Mercer Mettl, and Respondus differ in AI automation, live proctoring, integrations, and privacy controls, as some focus on automated monitoring while others provide human proctors, so you should choose the top tool based on exam scale, security level, and user experience.