Proteon, Inc. was a pioneering designer and manufacturer of computer network equipment based in Westborough, Massachusetts.

Proteon designed and manufactured of some of the earliest commercial local area network and TCP/IP Internet Router products.

[1] Although founded in 1972 by Howard Salwen as communications consulting firm, Proteon became a manufacturer when they produced the first commercial Token Ring network interfaces and media access units in conjunction with MIT.

Proteon's router products made them one of the key companies producing products to support the growing Internet, among rivals such as Cisco and Wellfleet Communications.

which was acquired by NSGDatacom in 2002, who dropped the NX Networks name in favor of Netrix.