Top 7 Open-Source Alternatives to Kattis

Product categories

Coding Education Exam Preparation Learn To Code Online Courses Online Education Online Learning Programming

Summary

The top open-source alternatives to Kattis are Codewars, LeetCode, and Exercism.io. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Codewars Landing Page
1

Codewars

Achieve code mastery through challenge.
Pricing:
- Open Source
#Online Learning #Online Education #Online Courses 160 social mentions
LeetCode Landing Page
2

LeetCode

Practice and level up your development skills and prepare for technical interviews.
Pricing:
- Open Source
#Online Education #Online Learning #Online Courses 515 social mentions
Exercism.io Landing Page
3

Exercism.io

Download and solve practice problems in over 30 different languages.
Pricing:
- Open Source
#Online Learning #Online Education #Online Courses 298 social mentions
The Odin Project Landing Page
4

The Odin Project

How it works. This is the website we wish we had when we were learning on our own. We scour the internet looking for only the best resources to supplement your learning and present them in a logical order.
Pricing:
- Open Source
#Online Learning #Online Courses #Online Education 233 social mentions
Project Euler Landing Page
5

Project Euler

Project Euler is a series of challenging mathematical/computer programming problems that will...
Pricing:
- Open Source
#Online Learning #Online Education #Programming 406 social mentions
W3Schools Landing Page
6

W3Schools

W3Schools is a web developers information website, with tutorials and references on web development...
Pricing:
- Open Source
#Online Learning #Online Courses #Online Education 186 social mentions
Battlesnake Landing Page
7

Battlesnake

Battlesnake is a multi-player programming game played by developers all over the world.
Pricing:
- Open Source
#Online Learning #Online Education #Online Courses 16 social mentions