[marcelsalathe]

https://www.crowdAI.org is an open source alternative. Disclaimer, my research group at EPFL started the platform, because we think there should be a community-based open source version that is open to anyone. Always looking for contributors!

Edit (1): Github https://github.com/crowdAI/crowdai Edit (2): We're currently re-designing the whole site to look & feel better.

[wapz]

I just looked at the site and it sounds real exciting (but way too difficult for me). Can I ask how you guys are funded? I saw that there is a ~$2000 payout for the winner of the most recent challenge.

[marcelsalathe]

The platform itself is funded by institutional research funding we get at EPFL. For some of the monetary prizes, these typically come from the corresponding projects.