Amazon has announced that Mechanical Turk, its long-running crowdsourcing marketplace, will stop accepting new customers from July 30, 2026. Amazon Web Services described the decision as the result of careful consideration, confirming that existing customers may continue using the service but that no new features are planned, effectively placing the platform in a state of managed decline.
Launched in 2005, Mechanical Turk was built as a marketplace where workers were paid small sums to complete simple tasks that resisted full automation, such as image labelling, sentiment classification, and CAPTCHA completion. From 2018, Amazon repositioned it as a data annotation tool for training neural networks within its SageMaker AI service. The platform also attracted controversy for its labour ethics, and played a peripheral role in the early Facebook–Cambridge Analytica data scandal.
The platform’s decline was accelerated by the very technology it helped build. A 2023 analysis found that between 33 and 46 percent of Mechanical Turk workers were using large language models to complete their assigned tasks, undermining the reliability of human-annotated data and raising questions about whether the human-in-the-loop model retained any value.
The closure reflects a broader irony: a platform that helped train AI models was ultimately made redundant by them. Community discussion following the announcement suggested the platform had already lost most of its active workforce to bots and fraud well before Amazon’s formal decision.
