Yes, both Assembla and CodeStream offer a Free Trial.
Assembla is designed for Large Enterprises, Medium Business and Small Business.
CodeStream is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Assembla Starts at $9.16/User/Month whereas for CodeStream Starts at $10/User/Month.
Some top alternatives to Assembla includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Jira, Wrike, TeamGantt, GitScrum, Teamwork, ProjectManager.com, Backlog, Axosoft, TaskBranch, Quick Base, Project.co and Height.
Some top alternatives to CodeStream includes CollaborateCloud, Cleverstack, Thoughtflow, brainCloud, HuddleIQ, Thinkspace, Qualified, Workvivo, Codebots and CodeSee.