Yes, both GitHub and Clustered Cloud offer a Free Trial.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Clustered Cloud is designed for Large Enterprises, Medium Business and Small Business.
Pricing for GitHub Starts at $4/User/Month whereas for Clustered Cloud Starts at $29/Month when Billed Yearly.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.
Some top alternatives to Clustered Cloud includes Microsoft Azure, Hybr SDX Datacenter, iofod, Codebots, AWS CloudFormation, Code Joh, Cube Cloud, ModernCloud, The m-Power Development Platform and Kubermachines.