1
Toph
toph.coAlso covers programming · same kind of website
Toph hosts competitive programming contests and problems on algorithms and data structures, with a community for participants.
Alternatives
The Best AtCoder Alternatives in 2026
24 alternatives4 free · 2 open source
Looking for something like AtCoder? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 4 are free or have a free plan and 2 are open source.
AtCoder hosts online programming contests, including beginner and heuristic contests, with practice contests for new users.
Top picks at a glance
First suggestionTophToph hosts competitive programming contests and problems on…Free or freemium optionExercismExercism offers practice and mentoring across 83…Open source optionRegexLearnRegexLearn teaches regular expressions through interactive…Another optionEMKCEMKC offers practical coding challenges and contests that…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Toph | — | Not stated | Web |
| 2 | EMKC | — | Not stated | Web |
| 3 | QB64SourceCode | — | Not stated | Web |
| 4 | Poignant | — | Not stated | Web |
| 5 | CodeAbbey | — | Not stated | Web |
| 6 | Codewars | — | Not stated | Web |
| 7 | 30 Seconds of Code | — | Not stated | Web |
| 8 | Exercism | Free | Not stated | Web |
| 9 | NeetCode | — | Not stated | Web |
| 10 | Scratch | Free | Not stated | Web |
All AtCoder alternatives
2
EMKC
emkc.org/challengesAlso covers programming · same kind of website
EMKC offers practical coding challenges and contests that can be completed in any of 17 programming languages.
3
QB64SourceCode
qb64tutorial.comAlso covers programming · same kind of website
A beginner tutorial introduces game programming with QB64 Phoenix Edition.
4
Poignant
poignant.guideAlso covers programming · same kind of website
Why's (Poignant) Guide to Ruby introduces Ruby programming through an illustrated guide for beginners.
5
CodeAbbey
codeabbey.comAlso covers programming · same kind of website
CodeAbbey offers programming problems for practice, with recent challenges and a programming certificate.
6
Codewars
codewars.comAlso covers programming · same kind of website
Codewars offers community-created coding exercises called kata, with practice across more than 55 programming languages.
7
30 Seconds of Code
30secondsofcode.orgAlso covers programming · same kind of website
30 Seconds of Code offers hundreds of short coding articles to help readers practice programming skills.
8
Also covers programming · same kind of website · free
Exercism offers practice and mentoring across 83 programming languages.
9
NeetCode
neetcode.ioAlso covers programming · same kind of website
NeetCode offers coding interview practice through courses, assessments, head-to-head mode, and a catalog of programming problems.
10
Also covers programming · same kind of website · free
Scratch lets people create interactive stories, games, and animations with a visual programming language and online community.
11
Codility
app.codility.com/programmersAlso covers programming · same kind of website
Codility Developer Training offers hands-on programming lessons, including exercises on topics such as binary gaps.
12
Rosetta Code
rosettacode.org/wiki/Rosetta_CodeAlso covers programming · same kind of website
Rosetta Code presents solutions to the same programming tasks in multiple languages for comparison.
13
Programiz
programiz.comAlso covers programming · same kind of website
Programiz offers free online compilers and code editors alongside programming tutorials for languages including Python, JavaScript, SQL, and C++.
14
zetcode
zetcode.comAlso covers programming · same kind of website
ZetCode offers accessible programming tutorials covering C#, Go, Python, Java, and other languages.
15
Ebook Foundation
ebookfoundation.github.io/free-programming-booksAlso covers programming · same kind of website
The Ebook Foundation's free-programming-books repository lists freely available learning resources in many languages.
16
CP-Algorithms
cp-algorithms.comAlso covers programming · same kind of website
Competitive programming algorithms are documented with descriptions and examples in CP-Algorithms.
17
Try Ruby
try.ruby-lang.orgAlso covers programming · same kind of website
TryRuby gives users a short, interactive introduction to programming in Ruby.
18
Learn X in Y minutes
learnxinyminutes.comAlso covers programming · same kind of website
Learn X in Y Minutes offers concise programming language tours and examples.
19
Amit’s Game Programming
www-cs-students.stanford.edu/~amitp/gameprog.h…Also covers programming · same kind of website
Amit’s Game Programming Information answers questions about learning game development, building games, and progressing as a programmer.
20
TechSchool
techschool.dev/enAlso covers programming · same kind of website
TechSchool provides free technology education and programming courses, including Elixir, Python, Ruby, React, and Node.
21
USACO Guide
usaco.guideAlso covers programming · same kind of website
USACO Guide curates competitive programming tutorials and resources organized from USACO Bronze through Platinum.
22
Also covers programming · open source · free
RegexLearn teaches regular expressions through interactive lessons and practice at different levels.
23
Also covers programming · open source
This repository collects application ideas that developers can use to practice and improve their coding skills.
24
Also covers programming · same kind of website · free plan
Hacksplaining teaches secure coding through interactive browser lessons covering OWASP Top 10 and GenAI threats.
No alternatives match this filter.
Alternatives to similar tools
Scratch24 alternativesQB64SourceCode24 alternativesHacksplaining24 alternativesCodeAbbey24 alternativesCodility24 alternativesCodewars24 alternatives
What is the best alternative to AtCoder?
Based on features, tags and platforms, the closest alternatives to AtCoder are Toph, EMKC, and QB64SourceCode.
Is there a free alternative to AtCoder?
Yes. Exercism, Scratch, and RegexLearn are free or offer a free plan.
Are there open-source alternatives to AtCoder?
Yes: RegexLearn and App ideas.
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