Yes, both Upsquare and GitHub offer a Free Trial.
Upsquare is designed for Large Enterprises, Medium Business and Small Business.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Upsquare Starts at $9/Month when Billed Yearly whereas for GitHub Starts at $4/User/Month.
Some top alternatives to Upsquare includes Bubble, Adalo, AppYourself, GitHub, AppInduce, Firebase, Codeless and Thunkable.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.