Yes, both GitHub and Shortcut offer a Free Trial.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Shortcut is designed for Large Enterprises, Medium Business and Small Business.
Pricing for GitHub Starts at $4/User/Month whereas for Shortcut Starts at $8.50/User/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 Shortcut includes Smartsheet, Miro, Process Street, Wrike, Notion, Jira, Next Please, Teamwork, ProjectManager.com, ProWorkflow, Kanbanize, Quick Base, ClickUp, Projectsly by 500apps, Height, Yodiz and Flow.