GitHub offers Free Trial, but Awesome Screenshot does not.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Awesome Screenshot is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for GitHub Starts at $4/User/Month whereas for Awesome Screenshot Starts at $2/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 Awesome Screenshot includes ScreenshotsCloud, Urlbox, Screenshot Machine, Screenshotlayer, ScreenshotAPI, FireShot, Snapup, Screenlapse, Droplr and ScreenshotOne.