Every platform we track

Contributor platform operated by Labelbox. Hires independent contractors worldwide for data labeling, evaluation and AI-alignment tasks; project-based with flexible hours. High ceiling for domain experts, though advertised rates can overstate typical earnings. Globally accessible. Login-walled, so entry here is directory-level.

Long-running data annotation and RLHF platform. Projects appear inside a logged-in dashboard after a qualification assessment, so listings are not public; entry here is directory-level.

The data-annotation arm of Handshake (the careers platform). Skews toward students, PhDs and credentialed experts — values academic depth over prior AI experience. High pay ceiling for domain work but known for variable work availability. Login-walled, so entry here is directory-level.

Matches contractors to AI-lab projects via an AI-screened application. Pay skews high for credentialed/expert work; tasks are project-based contracts with no guaranteed duration. The Explore page lists currently-open roles publicly.

Expert-data arm of micro1 (separate from its AI-recruiting product). Connects domain experts — engineering, finance, healthcare, legal, linguistics and more — with AI labs to review outputs and give structured feedback. Remote and global; no prior AI experience required. Work is accessed via a vetted, logged-in expert profile, so entry here is directory-level.

Scale AI's contributor platform for AI training and evaluation. Work is accessed through a login-walled expert portal rather than public listings, so entries here are directory-level rather than per-task.

Research-participant marketplace widely used for AI studies and data collection. Studies appear in a logged-in dashboard and are matched to participant eligibility, so entry here is directory-level.

RLHF and data-labeling platform working with major AI labs. Contributor work is invitation/qualification-based behind a login, so entry here is directory-level rather than per-task.