Amazon Shuts Down Mechanical Turk Crowdsourcing Platform in 2026
The pioneering human-in-the-loop service will cease operations after 17 years.
1Final Closure Announcement
Amazon has confirmed its Mechanical Turk (MTurk) crowdsourcing platform will permanently close on September 30, 2026. The service, which connected businesses with distributed workers for microtasks since 2005, will stop accepting new Human Intelligence Tasks (HITs) on that date. Amazon stated the decision followed regular evaluations of its programs and services. The platform's closure affects both requesters needing human-powered data processing and workers earning through microtasks.
2Worker Transition Plan
MTurk workers must verify payment details in their portal before closure, including payment methods and schedules. All approved HITs will be paid according to existing disbursement schedules. The platform will continue providing tax documentation through standard processes. Notably, the closure also impacts Amazon's SageMaker Ground Truth and Augmented AI services, which used MTurk workers for labeling and review workflows until the shutdown date.
3Requester Timeline
Requesters have until September 30, 2026 to submit HITs, with unsubmitted tasks expiring automatically. They retain 30 days post-closure (until October 30) to approve/reject completed work under standard policies. Bonus payments can be awarded until October 30. Requesters must verify payment information for refund processing, with prepaid balances refunded within 30 days. Transaction history remains accessible until January 28, 2027.
4Historical Context
The service's name references an 18th-century chess automaton that concealed a human player. Similarly, MTurk masked human intelligence behind API calls, solving tasks computers struggled with. Launched in 2005, it addressed Amazon's internal data processing needs before becoming a public platform. The marketplace enabled applications requiring human judgment at scale, pioneering the 'artificial artificial intelligence' concept.
5Platform Economics
MTurk's pricing included worker rewards set by requesters plus Amazon's fees: 20% base fee (minimum $0.01 per assignment), with additional charges for high-volume HITs. 'Masters Qualification' workers (top performers) incurred 5% extra fees, while Premium Qualifications started at $0.05 per assignment. The global platform served requesters from multiple continents and paid workers upon task approval.
6Key Use Cases
MTurk supported machine learning development (data labeling, model validation), business process outsourcing, and content moderation. Common applications included image categorization, web data collection, and social media moderation. For AI workflows, it provided human feedback loops - like drawing bounding boxes for computer vision models - where purely algorithmic solutions proved inadequate.
7Industry Impact
The closure leaves a gap in affordable, scalable human-in-the-loop services for AI development. Competing platforms may gain market share, though none match MTurk's integration with AWS services. Businesses using MTurk for data pipelines must find alternative solutions by 2026. The shutdown reflects Amazon's strategic shift away from certain cloud-adjacent services.
8Legacy and Transition
Mechanical Turk pioneered distributed human computation at internet scale, influencing modern gig economy platforms. Its closure after two decades marks an inflection point for crowdsourced AI training data. Organizations relying on MTurk have over two years to migrate workflows, while workers must transition to alternative microtask platforms. The shutdown underscores the evolving relationship between human labor and machine learning systems.
Original article: Unite.AI — Amazon Shuts Down Mechanical Turk Crowdsourcing Platform in 2026