HackerRank offers Free Trial, but iMocha does not.
iMocha is designed for Large Enterprises, Medium Business and Small Business.
HackerRank is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for iMocha Starts at $5,000/Year whereas for HackerRank Starts at $249/Month when Billed Yearly.
Some top alternatives to iMocha includes Mettl, Qualified, Workvivo, eSkill, Codility, Codejudge, CoderPad, DevSkiller, HackerRank, KillerCoder.io, Codidate and Tungl.
Some top alternatives to HackerRank includes DevScreen, LeetCode Interview, Qualified, Workvivo, HackerPen, Codejudge, CoderPad, HackerEarth, Interview Sandbox, KillerCoder.io, IFTTT and Codidate.