WANdisco's logo will replace that of previous home shirt sponsor Gilder Honda for the 2013/14 Championship season.
Former Owls chairman Dave Richards co-founded WANdisco, originally based in the Silicon Valley, in 2005.
Lifelong Wednesday fan Richards, chairman and chief executive of the company, said: "I am thoroughly delighted to align the WANdisco brand to that of Sheffield Wednesday.
"This club always has and always will have a place in my heart and I could hardly be more proud that the WANdisco logo will adorn the home shirt of the Owls."
Wednesday chairman Milan Mandaric added: "We take great pride in our commercial partners and WANdisco is the ideal fit for Sheffield Wednesday.
"Quite apart from being co-founded by a supporter of our club, WANdisco are renowned worldwide in the software industry.
"In addition, I have a tangible connection with the company given my own business background in Silicon Valley."
- Sports & Recreation