Vivo Software was a pioneer internet streaming media company which was acquired by RealNetworks in March 1998. Vivo Software designed the Vivo Video/Audio platform, including its encoding tools and end-user VivoActive Player.

The Vivo format, obsolete today, was one of the first to be designed and used for internet streaming. The Vivo platform was a well-known player when streaming media was in its infancy and was deployed mainly on erotic sites during the mid-1990s. Since then RealPlayer, QuickTime and Windows Mediahave evolved as the dominant platforms. The development of Vivo ceased in 1997 to be replaced by RealPlayer from RealNetworks.