Instagram began development in San Francisco as Burbn, a mobile check-in app created by Kevin Systrom and Mike Krieger. On March 5, 2010, Systrom closed a $500,000 (equivalent to $658,300 in 2022) seed funding round with Baseline Ventures and Andreessen Horowitz while working on Burbn.[13][14] Realizing that it was too similar to Foursquare, they refocused their app on photo-sharing, which had become a popular feature among its users.[15][16] They renamed it Instagram, a portmanteau of instant camera and telegram.[17]