Codewars vs Project Euler

Codewars8.9Visit Project Euler8.7Visit

Higher score Codewars #6 in Coding Learning Software 8.9/10 Free plan Free plan✓ 1 of 3 features Visit Codewars

vs

Project Euler #8 in Coding Learning Software 8.7/10 Free plan Free plan✓ 1 of 3 features Visit Project Euler

• Codewars fits best

  Developers practicing short coding challenges

• Project Euler fits best

  Learners practicing mathematical programming problems

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature	Codewars 8.9/10 Visit ↗	Project Euler 8.7/10 Visit ↗
At a glance
Editor score	8.9	8.7
Ranking	#6 in Coding Learning Software	#8 in Coding Learning Software
Best for	Developers practicing short coding challenges	Learners practicing mathematical programming problems
Pricing model	Free plan + paid	Free
Starting price	$40/yr	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Community, Docs	Community
Built for	Solo, Small business	Solo
Features Codewars 1/3 · Project Euler 1/3
Project-based learning	—	Not checked yet
Mobile apps	Not checked yet	Not checked yet
Computer science topics	✓	✓
Specs
Feedback mode	Automated	Not checked yet
Learning format	Exercises	Exercises
Programming languages	Agda, BF, C, CFML, C++, COBOL, CoffeeScript, Clojure, CommonLisp, Coq, Crystal, C#, D, Dart, Elixir, Elm, Erlang, Factor, Forth, Fortran, F#, Go, Groovy, Haskell, Haxe, Idris, Java, JavaScript, Julia, Kotlin, λ Calculus, Lean, Lua, NASM, Nim, Objective-C, OCaml, Pascal, Perl, PHP, PowerShell, Prolog, PureScript, Python, R, Racket, Raku, Reason, RISC-V, Ruby, Rust, Scala, Shell, Solidity, SQL, Swift, TypeScript, VB	Not checked yet
Our review
Pros	Community-created kata with sample and full test suites Supports many programming languages, including Python, JavaScript, and Rust Training routines, discussions, rankings, and solution comparison	Large archive of mathematical and programming problems Tracks solved problems, achievements, rankings, and statistics Difficulty ratings and community groups support ongoing practice
Cons	Focused on exercises rather than verified project-based learning No mobile apps Advanced Codewars Red features require a subscription	Focused on exercises rather than structured instruction Web-only access limits platform flexibility No language-specific instruction, projects, or integrations
Our verdict	Codewars is a browser-based coding practice platform for developers who want to improve programming skills through short, community-created kata. Users solve challenges in an in-browser editor, run sample tests, submit solutions to full… Read the review →	Project Euler is a web-based collection of challenging mathematical and computer-programming problems for students, mathematically interested adults, and professionals developing problem-solving skills. Its learning format is… Read the review →

Strengths and trade-offs

• Codewars — where it wins

  • Community-created kata with sample and full test suites
  • Supports many programming languages, including Python, JavaScript, and Rust
  • Training routines, discussions, rankings, and solution comparison

  Where it doesn't

  • Focused on exercises rather than verified project-based learning
  • No mobile apps
  • Advanced Codewars Red features require a subscription

• Project Euler — where it wins

  • Large archive of mathematical and programming problems
  • Tracks solved problems, achievements, rankings, and statistics
  • Difficulty ratings and community groups support ongoing practice

  Where it doesn't

  • Focused on exercises rather than structured instruction
  • Web-only access limits platform flexibility
  • No language-specific instruction, projects, or integrations

• Codewars8.9/10 · Free plan

  A strong choice for short, test-driven coding practice across many languages.

  Visit CodewarsFull verdict →
• Project Euler8.7/10 · Free plan

  A free, focused archive for practicing mathematical programming problems.

  Visit Project EulerFull verdict →