Adobe
Yes, both Backlog and Bugfender offer a Free Trial.
Backlog is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Bugfender is designed for Individuals, Large Enterprises, Medium Business and Small Business.
The starting price of Backlog begins at $29.16/Month when Billed Yearly, while pricing details for Bugfender are unavailable.
Some top alternatives to Backlog includes Quickbase , Smartsheet, ClickUp, Jira, Wrike, TeamGantt, FogBugz, Teamwork, ProjectManager.com, Trackboard, TaskBranch, Quick Base, TestRail, Height and Project Insight.
Some top alternatives to Bugfender includes Instabug, Bugsnag, ReportBugz, Buglog, BugHost, BugReplay, Bug-Track.com, Disbug, Crash Catch and Toybox.