One of the first differences that jumps out is Instagram ’ s younger user base . The older generation really isn ’ t active on the app . A majority of Instagram users are under 30 , and many are in their teens . This is great for companies trying to reach a younger demographic . Facebook on the other hand has been . Between Fall and Spring of 2014 , the number of teens using Facebook fell from 72 % to 45 %. The same study also found that 38 % of teens said that Instagram is a favorable marketing channel vs . 21 % for Facebook .