GitHub offers Free Trial, but ProductFlare does not.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
ProductFlare is designed for Large Enterprises, Medium Business and Small Business.
Pricing for GitHub Starts at $4/User/Month whereas for ProductFlare Starts at $1/Month.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.
Some top alternatives to ProductFlare includes Aha!, Roadmunk, ProdPad, ProductPlan, Jira, productboard, Productroad, ProdCamp, Next Please and IdeaPlan.