UDcast was a company that provided products for Internet Protocol (IP) over broadcast media.

UDcast was involved in international standards organisations such as ETSI and the Internet Engineering Task Force.

UDcast was founded in June 2000 by members of the INRIA research center who had helped develop Unidirectional Link Routing (the UD stands for unidirectional, and the cast for broadcast).

[1] Founders included Antoine Clerget, Patrick Cipière, Emmanuel Duros, and Luc Ottavj.

On 3 February 2011 OneAccess Networks announced they completed the acquisition of UDCast.