CodeWeavers

CodeWeavers is a software company that focuses on Wine development and sells a proprietary version of Wine called CrossOver for running Windows applications on macOS, ChromeOS and Linux. The company was founded in 1996 as a consultancy, eventually moving entirely over to Wine development and support.

CodeWeavers is the principal corporate sponsor of the Wine project, hosts Wine's website, helps sponsor the Wine conference, employs many Wine developers, and is a major code contributor to Wine. CodeWeavers claims that two-thirds of all commits to Wine come from their developers. The company also employs Wine's primary maintainer, Alexandre Julliard, as its CTO. While CodeWeavers main commercial interest in Wine is its use in the Crossover product, they also encourage enhancements to Wine that sometimes compete with Crossover.

CodeWeavers also employs some developers of wine-mono, an open-source reimplementation of Microsoft .NET framework (4.x and earlier) which is intended as a replacement for the .NET Framework in Wine. Wine-mono is a branch of Mono which has been tailored to work with Wine.

Since 2016, CodeWeavers has been contracted to work with Valve on Proton, a compatibility layer for running Windows games through Steam on Linux.

CodeWeavers is a founding member of the Desktop Linux Consortium.

CodeWeavers' products and services include CrossOver, PortJump, and ExecMode.

In April 2023, CodeWeavers transitioned to an employee ownership trust. Jeremy White stepped down as CEO and company president James Ramey assumed the role.