Ask HN: Recaptcha-like system to help train ML models

Is there any solution to help train ML models in an organization in a way similar to what Google does with Recaptcha?

I know that Amazon Mechanical Turk can be used for the same purpose, but I can't share data with people outside the company since data is private.

The ideal solution would be a SAAS where I can create an experiment with all data I would like to validate/train and share it with my colleagues, where they can help train the models in there spare time. A ranking system for gamification purposes would also be really nice.

If no such system exists, at least this seems a good side-project idea... (=