Instagram has over 800 million global users who can share photos and videos. It was founded in 2010 by Kevin Systrom and Mike Kroeger and was acquired by Facebook in 2012 for $1 billion. There are a few reasons one may want to find someone's Instagram email address, such as staying in touch with friends and family or for brand advertising purposes. Some tools that can help find an Instagram user's email address include Instagram email finders like iStaunch that search based on a username, as well as Hunter.io which is an email finder tool that can reveal addresses.