Neither Nimbus nor GitLive offers a free trial.
Nimbus is designed for Large Enterprises, Medium Business and Small Business.
GitLive is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Nimbus Starts at $3/User/Month whereas for GitLive Starts at $5/User/Month when Billed Yearly.
Some top alternatives to Nimbus includes Codeanywhere, PaizaCloud, AWS Cloud9, Koding, CodeinCloud, CodeTogether, Codigo, CodeSync, CodeOnline and HackerPen.
Some top alternatives to GitLive includes Codeanywhere, ShiftEdit, CodePen, CodeTogether, CodeSync, Codefile, Pseudocode Editor, CodeOnline, Glitch and Interview Sandbox.