Show HN: Automatically grade programming assignments

"Sign up for free" makes it sound like it's eventually going to be a paid service, because that is the language that all paid services use. I did not, however, find anything on the site with information about pricing. What is the status of this?

What is the privacy policy? I would not require my students (I'm teaching a class of 75 in the fall) to sign up for something unless there was a solid, written guarantee protecting their privacy.

I don't sign up for services just to test them out. It seems a bit "promiscuous" to me. Do you have a video demonstrating the process?

Students will receive instant feedback on their correctness and code quality. They can make multiple attempts to improve their submission.

Any feedback is appreciated!