Twitter doesn’t ask your age when you sign up, but Facebook does, and on Facebook the minimum age requirement is a hard and fast 13. It’s the same number on Instagram, Pinterest, Tumblr, Reddit, Snapchat and Secret, too.
Curiously, the minimum age on LinkedIn is 14. On WhatsApp it’s 16, and on Vine it’s 17. Some platforms, such as YouTube, WeChat and Kik, have a minimum age required of 18, although kids aged 13-17 can signup with parent’s permission.
Check out this infographic for more social media minimum age requirements, which comes courtesy of Linneyville.