Pipefy
SourceLevel offers Free Trial, but Observable does not.
Observable is designed for Individuals, Medium Business and Small Business.
SourceLevel is designed for Freelancers, Medium Business and Small Business.
Pricing for Observable Starts at $9/User/Month whereas for SourceLevel Starts at $5/User/Month.
Some top alternatives to Observable includes CodePen, Visualr, ibi Analytics Platform, Instadeq, Dashana, Ideata Analytics, Vizician, Zoomdata and Vizydrop.
Some top alternatives to SourceLevel includes DevScore, AWS Cloud9, Visual Studio IDE, CodePen, CodeTogether, YepCode, DeepSource, Codacy, Code Climate Quality and Code Inspector.