| Industry | Comparison shopping website, reverse auction |
|---|---|
| Founded | 2006, Middleton, Wisconsin, United States |
| Founder | Brian Wiegand and Mark McGuire |
| Headquarters | , United States |
Jellyfish.com was a reverse auction online shopping website. The Middleton, Wisconsin-based company was acquired by Microsoft in 2007. On May 22, 2008, Microsoft officially announced the cash back service as part of their Live Search group of tools. The site was shut down at midnight, February 16, 2009.