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Best for
Mercor. Credentialed experts — MDs, JDs, PhDs, senior engineers, finance professionals. Screening: recorded AI interview, 15–30 minutes, after a CV upload.
The catch: The hardest screen of any of them, and being accepted does not mean work is waiting.
Best for
Braintrust. Experts who want task-based AI work rather than waiting on a project match. Screening: profile, then an AI skills interview, then you browse and accept tasks.
The catch: The AI-training work sits inside a general freelance marketplace, so expert tasks share the site with ordinary contract listings, and the bottom of the pay band is annotation work rather than expert work.
Best for
Outlier. Coding and writing tasks, with the widest country eligibility. Screening: written assessment, sometimes a short coding test.
The catch: Queue instability is the most common complaint — work appears and disappears.
Some links here are referral links, which pay this site if you are hired. The order above is by fit for each background, not by which ones pay us.
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FAQ
It depends on your background, not on the platform. Mercor suits engineers who also want the higher-ceiling expert listings, and every non-engineer. Braintrust suits engineers who want code-review tasks they can pick up themselves. Outlier suits coders who want lower-bar, higher-volume work.
Yes. Most experienced contributors run two or three platforms, because acceptance on one does not guarantee work. The only limit is a conflict of interest on a specific project, which the platform will flag.
Platforms rarely say. The most common reasons are a rushed assessment, a CV that does not make the specialty obvious, or a country the project does not accept. Rejection on one platform says nothing about another.
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