Twitter becomes #1 2016 By smokedtuna44 Period: 2007 to 2021 Tumblr was Started 2007 Period: 2007 to 2021 Tumblr was Started 2007 Period: 2010 to 2021 Pinterest began 2010 Period: 2010 to 2021 Instagram was created 2010 Period: 2011 to 2021 Snapchat launched 2011 Period: 2017 to 2021 Tiktok launched 2017 Period: 2020 to 2021 Tiktok became #1 2020