Yes, both Basecamp and Intervals offer a Free Trial.
Basecamp is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Intervals is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Basecamp Starts at $15/user/month when monthly whereas for Intervals Starts at $29/Month.
Some top alternatives to Basecamp includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Jira, Trello, Wrike, TeamGantt, monday.com, Asana, Teamwork, ProjectManager.com, Quick Base, Project.co and Notion.
Some top alternatives to Intervals includes Quickbase , Smartsheet, ClickUp, Zoho Projects, TimeTracker App, Tick, TimeTrack, Time Track Bill, TimeControl, Wrike, Track My Work, Teamwork, ProjectManager.com, ProWorkflow, Quick Base and TaskBlast.