Horror is an incredibly versatile storytelling genre that's often given greater leeway and trust than other styles of cinema. There's something special and visceral about a feature film that can truly terrify its audience and get them to properly suspend their disbelief, and these fantastical fears can be conjured in many ways. Animation is a medium that's often associated with younger audiences, but there's been a greater push for adult animated movies, especially when it comes to horror.
Source:https://www.cbr.com/highest-rated-animated-horror-movies/