is there an alternative to the Amazon Mechanical Turk Web Service?

Question by Queenie: is there an alternative to the Amazon Mechanical Turk Web Service?
Are there other sites / services that provide the same service as the Amazon Mechanical Turk?

Best answer:

Answer by jaquez
The reason is in the wide audience and in the flexibility of the system.
There are some other crowdsourcing sites, but usually they are
specific to a certain goal, like for example ChaCha:

ChaCha is a mobile question answering service which uses a technique known as the Human search engine. ChaCha was created by Scott A. Jones and Brad Bostic. The company is based in Carmel, Indiana, a suburb of Indianapolis.

So that is an alternative, but for workers, not for requesters.

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