Nullsoft, Inc. was an American software house founded in Sedona, Arizona in 1997 by programmer Justin Frankel.

[3][4] According to Bonnie Burton, then editor of the website Winamp.com, 2001 was a period of heightened tension between the Nullsoft staff and upper management, because of Frankel's uncompromising views about file-sharing.

[5][6] Ars Technica also noted that AOL failed to effectively monetize or find a larger audience for Winamp.

[7] Nullsoft's San Francisco offices were closed in December 2003, with a near-concurrent departure of Frankel and the original Winamp development team.

[11] On January 14, 2014, it was officially announced that Belgian online radio aggregator Radionomy had bought Winamp and Shoutcast, formerly owned by Nullsoft.

[1] The company released several new versions of the Winamp player and grew its monthly unique subscriber base to 60 million users by late 2004.