Amazon Mechanical Turk shuts down, crowdsourced labor era closes

Amazon Mechanical Turk is shutting down September 30. The largest requester for the past decade noted they found out at the same time as workers, which says something about how Amazon views its relationship with both. The irony commenters keep raising is that AMT is shutting down precisely when AI agents need human-in-the-loop task handling more than ever.

The pattern here is substitution eating its own source material. AMT was used heavily to generate training data for the models that are now replacing it. The human crowdsourced labor market for data labeling is contracting as AI takes over simple tasks, but the more complex judgment calls that agents cannot handle reliably still need humans, and the infrastructure for routing those tasks just closed.

This creates a gap. Startups building agentic workflows that need human escalation paths now have one less mature platform to route through. The alternatives are younger, smaller, and less battle-tested.