In addition to platform processing and home network hardware, Sigma Designs also offered engineering support services and customized integrated circuit development.

[1] Sigma had alliances with other technology companies, including Microsoft,[2] and their products are found in stand-alone full HD multimedia players.

[3][4] Sigma Designs was founded in 1982 and is based in Fremont, California, with locations in Canada, Denmark, France, Israel, Japan, Netherlands and Singapore.

[8] On January 23, 2018, Sigma announced it was unable to meet certain closing conditions, and instead it planned to sell its Z-Wave business to Silicon Labs for $240m, and liquidate the company.

[12] On December 18, 2008, Sigma Designs announced the acquisition of California-based Zensys, a company that provides the wireless mesh networking technology Z-Wave.

[15] On March 21, 2012, Sigma announced that it has signed an asset purchase agreement to serve as the "stalking horse bidder" to acquire certain assets of Trident Microsystems, Inc.’s Digital Television (DTV) Business, which includes certain products, licensed intellectual property, software and leased facilities, for $21 million in cash plus assumption of specified liabilities.

Z-Wave is a wireless radio frequency communications technology designed for control and status reading applications in residential and light commercial environments.

Sigma Designs was contacted and confirmed that a programmer had based REALmagic on Xvid, but assured that all GPL code would be replaced to avoid copyright infringement.