1
CodeAbbey
codeabbey.comSame kind of website
CodeAbbey offers programming problems for practice, with recent challenges and a programming certificate.
Alternatives
The Best Kattis Alternatives in 2026
17 alternatives2 free · 2 open source
Looking for something like Kattis? Here are 17 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 2 are free or have a free plan and 2 are open source.
Kattis provides a problem archive for users to practice programming challenges.
Top picks at a glance
First suggestionCodeAbbeyCodeAbbey offers programming problems for practice, with…Free or freemium optionExercismExercism offers practice and mentoring across 83…Open source optionVideosThis repository provides solutions to LeetCode problems for…Another optionCSES ProblemsetCSES Problem Set provides programming tasks for practice…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | CodeAbbey | — | Not stated | Web |
| 2 | CSES Problemset | — | Not stated | Web |
| 3 | NeetCode | — | Not stated | Web |
| 4 | UI Coach | — | Not stated | Web |
| 5 | Toph | — | Not stated | Web |
| 6 | EMKC | — | Not stated | Web |
| 7 | GeeksforGeeks | — | Not stated | Linux, Web |
| 8 | AtCoder | — | Not stated | Web |
| 9 | Codewars | — | Not stated | Web |
| 10 | 30 Seconds of Code | — | Not stated | Web |
All Kattis alternatives
2
CSES Problemset
cses.fi/problemsetSame kind of website
CSES Problem Set provides programming tasks for practice, with problem categories, statistics, and account features.
3
NeetCode
neetcode.ioSame kind of website
NeetCode offers coding interview practice through courses, assessments, head-to-head mode, and a catalog of programming problems.
4
UI Coach
uicoach.ioSame kind of website
UI Coach helps designers practice through focused challenges and explore design references, color palettes, and typography.
5
Toph
toph.coSame kind of website
Toph hosts competitive programming contests and problems on algorithms and data structures, with a community for participants.
6
EMKC
emkc.org/challengesSame kind of website
EMKC offers practical coding challenges and contests that can be completed in any of 17 programming languages.
7
GeeksforGeeks
geeksforgeeks.orgSame kind of website
GeeksforGeeks provides programming tutorials, courses, interview preparation, and data structure practice.
8
AtCoder
atcoder.jpSame kind of website
AtCoder hosts online programming contests, including beginner and heuristic contests, with practice contests for new users.
9
Codewars
codewars.comSame kind of website
Codewars offers community-created coding exercises called kata, with practice across more than 55 programming languages.
10
30 Seconds of Code
30secondsofcode.orgSame kind of website
30 Seconds of Code offers hundreds of short coding articles to help readers practice programming skills.
11
Same kind of website · free
Exercism offers practice and mentoring across 83 programming languages.
12
Checki0
checkio.orgSame kind of website
CheckiO provides coding games where learners practice Python and TypeScript programming.
13
Same kind of website · free
CodinGame combines coding games, puzzles, and programming challenges, with support for more than 25 languages.
14
HackTheEarth
hackerearth.com/challengesSame kind of website
HackerEarth's Compete section offers programming challenges from companies for users to test their skills.
15
Data Engineering Practice Problems
github.com/danielbeach/data-engineering-practiceData Engineering Practice Problems provides exercises for practicing data engineering skills.
16
Open source
This repository provides solutions to LeetCode problems for readers to review and use in coding practice.
17
Open source
Coding Problems provides solutions to coding and algorithm problems and multiple programming exercises.
No alternatives match this filter.
Alternatives to similar tools
CodeAbbey24 alternativesGeeksforGeeks24 alternativesData Engineering Practice Problems24 alternativesCoding Problems24 alternativesCodewars24 alternativesChecki024 alternatives
What is the best alternative to Kattis?
Based on features, tags and platforms, the closest alternatives to Kattis are CodeAbbey, CSES Problemset, and NeetCode.
Is there a free alternative to Kattis?
Yes. Exercism and CodinGame are free or offer a free plan.
Are there open-source alternatives to Kattis?
Yes: Videos and Coding Problems.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative