Maybe http://www.wolfram.com/development-platform/pricing/ http://www.wolfram.com/development-platform/pricing/ ? There is even a free plan. Not sure how differ

Maybe http://www.wolfram.com/development-platform/pricing/ http://www.wolfram.com/development-platform/pricing/ ? There is even a free plan. Not sure how different it is from "regular" Mathematica, or what licensing restrictions there are.