I personally feel that people are most open on snapchat since you only have friends that you regularly interact with. On facebook you only upload posts/picture

I personally feel that people are most open on snapchat since you only have friends that you regularly interact with. On facebook you only upload posts/pictures that matter, on Instagram you only upload pictures where you look really good or a picture of food (I personally hate it, unless it's something unique) whereas on snapchat you'll send pictures to friends where it doesn't matter how you look.