Yes, both GitHub and AnnounceKit offer a Free Trial.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
AnnounceKit is designed for Large Enterprises, Medium Business and Small Business.
Pricing for GitHub Starts at $4/User/Month whereas for AnnounceKit Starts at $49/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 AnnounceKit includes Beamer, Posted, Buzz, Qualified, beehiiv, Workvivo, React & Share, Changeloggy, Beam.gg, CommentScreen, FeedBaxley and IFTTT.