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