https://devpost.com/ https://devpost.com/ I'm not sure what you mean by startup challenges. But Devpost immediately comes into my mind when talking about onlin

https://devpost.com/ https://devpost.com/ I'm not sure what you mean by startup challenges. But Devpost immediately comes into my mind when talking about online hackathons. The hackathons are sponsored by either profit and non-profit organizations. They have either monetary and non-monetary prizes. I was able to join on some of their online challenges and won monetary prize. I'm not sure though if they have startup challenges. Just check it out.