Upwork, formerly Elance-oDesk, is a global freelancing platform where businesses and independent professionals connect and collaborate remotely. In 2015, Elance-oDesk was rebranded as Upwork. It is based in Santa Clara and San Francisco, California. The full name is Upwork Global Inc.

Upwork has twelve million registered freelancers and five million registered clients. Three million jobs are posted annually, worth a total of US $1 billion, making it the largest freelancer marketplace in the world