Yes, both GitHub and Keypup offer a Free Trial.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Keypup is designed for Large Enterprises, Medium Business and Small Business.
Pricing for GitHub Starts at $4/User/Month whereas for Keypup Starts at $4.49/User/Month.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.
Some top alternatives to Keypup includes Aha!, Jira, Productroad, Backlogs, Next Please, Height, Yodiz, Flow, Worktez and Built.io Flow.