Clickworker and UHRS
Clickworker shows its tasks only to registered workers, so there's no public list to read. You can sign up at clickworker.com.
Uber AI Solutions
Uber's AI data work is offered inside its own sign-up portal, after ID checks; its public careers site lists only staff jobs.
Defined.ai (Neevo), Shaip and others that hire through an app
Some platforms recruit contributors only through their own app or portal, with no public list of roles. We can't list what we can't see, so they aren't here.
Toloka
Toloka's contributor work goes through Mindrift, which we list.
Want a platform added?
If a platform publishes its roles somewhere we can read, or would like to send us a feed, see For platforms.