What is the "it" in this case? If you mean WinRAR, no, it is made by a German company. 7-Zip's lead developer, however, is Russian.
WinRAR has been developed by win.rar GmbH from Berlin since 1995. This is still majority-owned by the two founders Burak Canboy and Öncül Kaya. Approximately 12% of the shares in WinRAR GmbH belong to the company Givanto.[3]