Sphere Contest is described as 'Attract and test your applicants by giving them cool challenges. Last man standing is the candidate you are looking for' and is an app in the Development category. There are more than 10 alternatives to Sphere Contest for a variety of platforms, including Online / Web-based, Mac, Windows, SaaS and Linux. The best alternative is HackerRank. It's not free, so if you're looking for a free alternative, you could try LeetCode or Remoteinterview. Other great apps like Sphere Contest are CodeSignal (Paid), Codility.com (Paid), HackerEarth (Free) and CodingStreet.io (Free).
LeetCode is a platform for learning and improving coding skills with the goal of being fully prepared for programming interviews. Choose problems to solve from categories such as System Design, Algorithms and Database, join code contests and engage in mock interviews.
CodeSignal is the leading provider of assessments for technical hires. As the creator of the Predictive Coding Score, a measure of a candidates coding skills, CodeSignal provides HR teams with Certified Assessments, Custom Tests, and Live Interviews.
Codility is an evidence-based platform helps hiring teams predict the real-life skills of their candidates, remotely and at scale. This brings faster hiring, time savings, and gives engineers more time to solve problems that matter.
DevSkiller is a developer screening and online interview platform powered by RealLifeTesting™ methodology. The tool allows you to find developers with the right skill set, shortening your Time-to-Hire by 60%.