Yes, both Userback and Asana offer a Free Trial.
Userback is designed for Individuals, Freelancers, Medium Business and Small Business.
Asana is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Userback Starts at $14/Month when Billed Yearly whereas for Asana Starts at $6.92/user/month when monthly.
Some top alternatives to Userback includes Backlogs, Backlog, ReportBugz, Buglog, Usersnap, Ybug, Bug-Track.com, Disbug, Feedback Monkey and Toybox.
Some top alternatives to Asana includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Jira, Basecamp, Trello, Wrike, ProofHub, monday.com, Teamwork, ProjectManager.com, Microsoft Project, Quick Base and Height.