Amazon Suspends New User Sign-Ups for Mechanical Turk

Amazon’s Mechanical Turk may be approaching its end.

As stated in an announcement on the Mechanical Turk website, the crowdsourcing platform will stop accepting new customers after July 30, 2026. Amazon Web Services explained that this choice came after “careful consideration,” emphasizing, “Current customers can continue to use the service as they have in the past. AWS is dedicated to improving security and availability for Mechanical Turk, but we do not plan to introduce new features.”

Essentially, while Amazon is not completely discontinuing the service, its position is evidently fragile.

Launched in 2005, Mechanical Turk became a venue for individuals to earn small payments for completing simple tasks that were hard to automate—such as solving CAPTCHA challenges or determining the sentiment of a sentence.

At its height, the platform was central to conversations about the ethics of crowdsourced labor and even played a minor role in the initial stages of the Facebook-Cambridge Analytica scandal.

Beginning in 2018, Amazon started promoting it as a tool for businesses to annotate data for training neural networks as part of its SageMaker AI service.

Less overtly, Mechanical Turk has functioned as a behind-the-scenes enabler for companies adopting a fake-it-till-you-make-it approach in AI, where products marketed as AI are actually supported by the Mechanical Turk workforce—a striking parallel considering that the original Mechanical Turk was also a ruse, featuring a hidden human chess player disguised as a chess machine.

Over the years, the connection between Mechanical Turk and AI models has become more complex. In an ironic turn of events, a 2023 study highlighted that between 33% and 46% of workers on the platform were using large language models to execute their tasks, casting doubt on the reliability of the data annotated on the platform and questioning whether authentic human input was truly required.

This week, following Amazon’s announcement, a Reddit user noted that the platform had essentially “died years ago,” with both workers and researchers departing due to bots and fraudulent behavior. The user predicted, “Someone at Amazon will eventually decide that maintaining the Mturk servers is a waste of time and resources and will shut it down completely.”