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15 hours ago · Steve Chen, Chad Hurley, Jawed Karim 2005 Reddit: Aaron Swartz 2006 X: Jack Dorsey 2006 VK: Pavel Durov 2008 Nextdoor: Nirav Tolia, Sarah Leary, Prakash Janakiraman, David Wiesen 2009 WhatsApp: Brian Acton, Jan Koum 2010 Pinterest: Ben Silbermann 2010 Instagram: Kevin Systrom 2011 Snapchat: Evan Spiegel 2011 Google+: Bradley Horowitz 2011 ...