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Yes, both Codidate and HackerRank offer a Free Trial.
Codidate is designed for Individuals, Freelancers, Medium Business and Small Business.
HackerRank is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Codidate Starts at $49/Month whereas for HackerRank Starts at $249/Month when Billed Yearly.
Some top alternatives to Codidate includes LeetCode Interview, CodingView.io, Qualified, Workvivo, ViewCoder, HackerPen, CoderPad, Interview Sandbox, HackerRank, KillerCoder.io and IFTTT.
Some top alternatives to HackerRank includes DevScreen, LeetCode Interview, Qualified, Workvivo, HackerPen, Codejudge, CoderPad, HackerEarth, Interview Sandbox, KillerCoder.io, IFTTT and Codidate.