PicsArt& Instagram

The audience of PicsArt is anyone who sees pictures as an art. Instagram is for people who can view pictures as an art, to follow their friends,  or celebrities,  or to view videos.
The genre for both sitesides is photography or visual imagery.
The purpose of PicsArt  is for people to be creative with the pictures they have taken, or pictures from other artist.
The purpose of instagram is simply to share visual media, the message delivered is up to the sharer.
The context of PicsArt is art and creativity.
The context of instagram is sharing