Yes, both Sifter and FogBugz offer a Free Trial.
Sifter is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
FogBugz is designed for Large Enterprises, Small Business and Medium Business.
Pricing details for both Sifter and FogBugz are unavailable at this time. Contact the respective providers for more information.
Some top alternatives to Sifter includes FogBugz, Backlog, The Bug Squasher, Zoho BugTracker, MantisBT, ReportBugz, Bug-Track.com, Disbug, TaskSift and Crash Catch.
Some top alternatives to FogBugz includes Freshbooks, Jira, Wrike, Smartsheet, Zoho Projects, GitScrum, Teamwork, ProjectManager.com, Backlog, Worksuite, Sprintly, Quick Base, ClickUp, Resource Guru, TestRail, Height, Yodiz and TaskBlast.