Yes, both Sentry and Usersnap offer a Free Trial.
Sentry is designed for Large Enterprises, Medium Business and Small Business.
Usersnap is designed for Large Enterprises, Medium Business and Small Business.
Pricing details for both Sentry and Usersnap are unavailable at this time. Contact the respective providers for more information.
Some top alternatives to Sentry includes The Bug Squasher, Bugsnag, Zoho BugTracker, Rollbar, TrackJS, BugHost, Bug-Track.com, Disbug, Hawk and Crash Catch.
Some top alternatives to Usersnap includes User Insights, UserTesting, ReportBugz, Buglog, Ybug, UserFace, UserVoice, Feedback Monkey, Toybox and Userback.