Yes, both BuildFire and GitHub offer a Free Trial.
BuildFire is designed for Large Enterprises, Medium Business and Small Business.
GitHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for BuildFire Starts at $159/Month whereas for GitHub Starts at $4/User/Month.
Some top alternatives to BuildFire includes Bubble, Adalo, Bizness Apps, Apphive, Applify, Flutter, Appy Pie, Appily App Builder and Andromo.
Some top alternatives to GitHub includes LiveCode, Codeanywhere, Visual Studio IDE, CodeinCloud, GitLive, Microsoft Azure, GitLab, CodeSee and Bitbucket.