Yes, both SourceLevel and CodeTogether offer a Free Trial.
SourceLevel is designed for Freelancers, Medium Business and Small Business.
CodeTogether is designed for Large Enterprises, Medium Business and Small Business.
Pricing for SourceLevel Starts at $5/User/Month whereas for CodeTogether Starts at $1,750/Year.
Some top alternatives to SourceLevel includes DevScore, AWS Cloud9, Visual Studio IDE, CodePen, CodeTogether, YepCode, DeepSource, Codacy, Code Climate Quality and Code Inspector.
Some top alternatives to CodeTogether includes IntelliJ IDEA, Codeanywhere, ShiftEdit, Koding, CodeinCloud, GitLive, CodeSync, Codefile, CodeOnline and HackerPen.