Mechanical Turk vs Upwork


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Mechanical Turk
Amazon Mechanical Turk (MTurk) is a crowdsourcing Internet marketplace that enables individuals or businesses to co-ordinate the use of human intelligence to perform tasks that computers are currently unable to do. It is one of the sites of Amazon Web Services. The Requesters are able to post tasks known as HITs (Human Intelligence Tasks), such as choosing the best among several photographs of a store-front, writing product descriptions, or identifying performers on music CDs.
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Upwork
Upwork stands out of all other alternatives on freelance market. Great work starts with great talent. Get amazing results working with the best programmers, designers, writers and other top online pros. Hire freelancers with confidence, always knowing their work experience and feedback from other clients.
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2015 - Elance-oDesk rebrands as Upwork. Mechanical Turk keeps calm



More than a year after the two competitors Elance and oDesk merged to form one freelancer powerhouse, it is finally rebranding under a new name, Upwork. And with the new name comes a new platform, which adds a new mobile app, new search algorithms, faster processing and a real-time chat service — a completely free product that Upwork’s new CEO Stephane Kasriel describes as a “Slack killer.” Upwork is making its collaboration and chat platform completely free to use, and also available to anyone who wants it — not just those people posting jobs on Upwork or those looking for work. As with Slack, Upwork is looking to add more features to the service, such as integrations with GitHub, Google Drive, Jira and video functionality later this year. The online job search market is full of competition, with Indeed.com, Monster, CarreerBuilder, LinkedIn and many more also playing strong in the permanent jobs space.