Yes, both Google Drive and Assembla offer a Free Trial.
Google Drive is designed for Large Enterprises, Medium Business and Small Business.
Assembla is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Google Drive Starts at $8/User/Month whereas for Assembla Starts at $9.16/User/Month.
Some top alternatives to Google Drive includes CollaborateCloud, Odrive, CloudFiles, Dropbox Business, Zoho WorkDrive, FileCloud, Microsoft OneDrive for Business, Dropbox Professional, DocUp and OpenDrive.
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.