Kattis helps companies make safer recruitments and attract the best developers with its dynamic challenge platform.
Cost / License
- Paid
- Proprietary
Platforms
- Online



Codewars is described as 'Achieve code mastery through challenge' and is an website in the development category. There are more than 25 alternatives to Codewars, not only websites but also apps for a variety of platforms, including Windows, Mac, SaaS and iPhone apps. The best Codewars alternative is exercism, which is both free and Open Source. Other great sites and apps similar to Codewars are Codecademy, LeetCode, HackerRank and Code.org.
Kattis helps companies make safer recruitments and attract the best developers with its dynamic challenge platform.



At Geektastic we help our client's thoroughly evaluate their future talent using our unique peer reviewed code challenge platform. We believe a candidate is worth more than a score and the only way to thoroughly understand how suitable they are to work in your team is to...
Stop wasting your engineers' time with candidates you never hire. Paircast video take-homes show you how candidates solve real-world problems before they reach your engineers. Records screen and code changes during development. Works with all languages.

Paircast is the most popular SaaS alternative to Codewars.

LabEx is an interactive, hands-on learning platform dedicated to coding and technology. It combines labs, AI assistance, and virtual machines to provide a no-video, practical learning experience.


KillerCoder.io is a testing platform to test developers and improve your technical hiring efficiency. Create an account and invite prospective candidates and test their technical and/or soft skills.


Level up your coding skills with a gamified twist! Tackle exercises across major languages, enjoy real-time stats, and climb weekly leagues. Keep your streak, compete with friends, and progress through categories. Available on iOS and Web.




CodenQuest is the most popular iPad alternative to Codewars.
This version of Ruby Warrior is a project by Bloc, a part-time online coding bootcamp for people who want to keep their current job, learn how to code, and become a full-time software developer.




Website to help developers improve their programming skills by practising simple coding exercises. The target audience is Software Engineers, Test Automation Engineers, or anyone curious about computer programming.


Master coding and AI with CodeFriends — hands-on lessons, real-time AI feedback, and one-click project deployment, all in your browser.




