Codility - Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.

HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.

iMocha - Make intelligent talent decisions.

Adaface - Adaface offers an AI-powered method to automate first-round tech interviews and evaluate candidates for technical roles. Every Adaface assessment is tailored to each job description, to test for the skills that are essential to the job.

Coderbyte - Coderbyte is a place built for anyone to practice and perfect their programming skills.

CodeInterview.io - CodeInterview is a live coding interview tool for developers.