Visual Studio IDE offers Free Trial, but Observable does not.
Observable is designed for Individuals, Medium Business and Small Business.
Visual Studio IDE is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Observable Starts at $9/User/Month whereas for Visual Studio IDE Starts at $45/Month.
Some top alternatives to Observable includes CodePen, Visualr, ibi Analytics Platform, Instadeq, Dashana, Ideata Analytics, Vizician, Zoomdata and Vizydrop.
Some top alternatives to Visual Studio IDE includes IntelliJ IDEA, Codeanywhere, Eclipse Che, CodeinCloud, CodeTogether, Microsoft Azure, ReSharper, CodeRush, Coder and CodeOnline.