Yes, both BackFeed+ and 15Five offer a Free Trial.
BackFeed+ is designed for Large Enterprises, Medium Business and Small Business.
15Five is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for BackFeed+ Starts at $19.99/User/Month whereas for 15Five Starts at $7/User/Month.
Some top alternatives to BackFeed+ includes 15Five, Synergita, Small Improvements, Performance Pro, Clear Review, BullseyeEngagement, easyfeedback, Performly, viRTF, Tap My Back and Leapsome.
Some top alternatives to 15Five includes Lattice, Impraise, Synergita, Betterworks, Performance Culture, PerformanceHub, 10xPerformance, Culture Amp, Performly, Employee Success Platform, Leapsome and EmpowerPoints.