You can watch the movie Paranormal Activity on several streaming platforms. Currently, it is available for streaming on fuboTV, MGM+ (including Amazon Channel, Roku Premium Channel), and Philo

. Additionally, you can rent or buy it on Amazon Video, Apple TV, Fandango At Home, and Microsoft Store

. Netflix also offers Paranormal Activity for streaming in some regions, such as Belgium

. Other platforms where the film might be available with ads or subscription include Paramount Plus, MagentaTV, Joyn Plus, and Home of Horror, among others

. In summary, the best options to watch Paranormal Activity online are:

• Streaming: fuboTV, MGM+, Philo, Netflix (region-dependent)
• Rent or buy: Amazon Video, Apple TV, Fandango At Home, Microsoft Store

Make sure to check availability in your region as it may vary.