SkyscraperCity, also known as SkyscraperCity.com, is the world's largest online forum on skyscrapers and urban related topics.[2][3][4][5][6] The website, which currently runs on XenForo, was founded in 2002 by Dutch economist Jan Klerks running on vBulletin,[2][7][8][9] in order to share and solicit comment on urban development in Rotterdam.[10] It gradually expanded to include other city and country subforums, eventually encompassing the entire world.
As of 2019,[update] the forum has over 1 million members, 1 million threads and over 110 million posts.[11] By some measures, it was considered the largest online forum in the world in 2010[8] or largest online bulletin board in the world.[10] In 2009, the forum attracted more than 500,000 unique visitors daily.[3] In 2018, SkyscraperCity was acquired by VerticalScope and the forum was migrated from vBulletin to XenForo in 2020.[11]
Volunteers
The site works by allowing members to add photos and other details to the website.[12][13] Despite the fact that many facts on the site are not vetted, news organizations quote the users on the web site.[14][13][15] The photos uploaded by volunteers are often used in news articles.[16][17][18]