[2] NK.pl was launched on 11 November 2006 by Maciej Popowicz, Paweł Olchawa, Michał Bartoszkiewicz, and Łukasz Adziński, four college students studying computer science at the University of Wrocław.

[citation needed] The website enjoyed success, and one 2009 study called it a "model example of the ‘rags to riches’ ideal of an enterprise construed with no financial funding and no institutional support (neither from ASP/ISP corporations nor from central/local administration)".

[5] NK.pl then ranked among the top five websites used in Poland, behind Google.pl, Onet.pl, and Wirtualna Polska, and it was visited by more than 50% of Polish Internet users each month (with 10% of the traffic coming from abroad).

[6][failed verification] In June 2010, a rebranding and changes to terms of use demanding that users allow the portal to use their profile photo commercially along with select private information, triggered a mass exodus.

[9][clarification needed] It had a trust and safety team that worked with law enforcement to resolve matters related to threatening and dangerous posts and other illegal activity.