What platforms let you get paid to help train AI models?

Looking for a starting list of legitimate places that actually pay for this kind of work, not scam sites.

Some of the more commonly referenced names in this space include Outlier (run by Scale AI), DataAnnotation, Alignerr (via Labelbox), Mindrift, Toloka, Appen, TELUS International AI, Clickworker, and Surge AI, among others — new platforms show up fairly often as demand from AI labs has grown. They differ in things like which countries they accept applicants from, how long the initial qualification/vetting process takes (anywhere from same-day to several weeks), and what kind of specialized task tracks they offer. As with any online work, do a quick check before committing time: legitimate platforms never charge you to apply or to access "training," and you should be able to find independent reviews and a real company presence online. Since this space changes quickly, it's worth checking current reviews close to when you're actually signing up rather than relying on an old list.