Best Coding Challenge Sites in 2026
Updated
If you want structured practice while learning to code, these challenge sites offer problems and programming exercises to explore. Compare the options on primary use, supported languages, and problem library size, then look at whether custom challenges or company assessments are relevant to your goals. Solution explanations can help you review how a problem is approached. The comparison also includes free plans and starting paid prices, so you can weigh access and cost. GeeksforGeeks Practice, Codeforces, and AtCoder are among the first-ranked entries. Consider which combination of practice format, language support, and explanation style suits the way you want to build your coding skills.
30ranked
16free plans on this page
$2/molowest paid tier
9 Oct 2026last checked
Coding challenge sites, ranked on how quickly a newcomer can get going.21 of 21 products with recorded free access can be tried for free.
- 1 EolympFree plan
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 2 CodeSignalPaid from $24.99/mo
- Free to practise on: yes
- Well documented: yes
- Runs where you work: yes
- 3 DMOJFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: yes
- 4 EdabitFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 5 HackerRankPaid from $165/mo
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 6 AtCoderFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 7 CodingBatFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 8 HackerEarth AssessmentsFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: yes
- 9 Yandex ContestFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 10 beecrowdFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 11 CheckiOPaid from $4.17/mo
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 12 CodeChef IDEFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 13 CodeforcesFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 14 CodilityPaid from $100/mo
- Free to practise on: no
- Free trial: yes
- Well documented: yes
- Runs where you work: yes
- 15 CSSBattlePaid from $4.90/mo
- Free to practise on: yes
- Free trial: no
- Well documented: yes
- Runs where you work: no
- 16 SQLZooFree plan
- Free to practise on: yes
- Well documented: yes
- Runs where you work: no
- 17 DOMjudgeFree plan
- Free to practise on: yes
- Free trial: no
- Well documented: yes
- Runs where you work: no
- 18 Frontend MentorFree plan
- Free to practise on: yes
- Free trial: no
- Well documented: yes
- Runs where you work: no
- 19 GeeksforGeeks Practice
- Well documented: yes
- Runs where you work: yes
- 20 TestDome
- Free to practise on: no
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 21 CoderbytePaid from $99/mo
- Free to practise on: no
- Free trial: yes
- Well documented: yes
- Runs where you work: no
- 22 Project EulerFree plan
- Free to practise on: yes
- Free trial: no
- Well documented: yes
- Runs where you work: no
- 23 CodewarsPaid from $2/mo
- Well documented: yes
- Runs where you work: no
- 24 Kattis
- Well documented: yes
- Runs where you work: no
- 25 NextJudge
- Well documented: yes
- Runs where you work: no
Compare all 25 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Primary use | Languages supported |
|---|---|---|---|---|---|---|---|---|
| 1 | Eolymp | 7.6 | Free plan | Free | No | practice | C++, Python, Java, Go, Pascal, Haskell, Lisp, Assembly, PHP, JavaScript, C# | |
| 2 | CodeSignal | 7.2 | Free plan | $24.99/mo | Yes | 79 /mo | ||
| 3 | DMOJ | 7.1 | Free plan | Free | ||||
| 4 | Edabit | 7.1 | Free plan | Free | Yes | practice | C#, C++, Java, JavaScript, PHP, Python, Ruby, Swift | |
| 5 | HackerRank | 7.1 | $165/mo | No | 165 /mo | |||
| 6 | AtCoder | 7.0 | Free plan | Free | Yes | contests | C, C++, C#, Java, Python, Rust, Ruby, Go, Kotlin, Swift, JavaScript, TypeScript, PHP, Perl, Lua, Scala, Haskell, OCaml, Nim, Pascal, R, SQL, Prolog, PowerShell, Bash, Fortran, COBOL, Julia, Dart, Elixir, Erlang, F#, D, Crystal, Clojure, Common Lisp, Scheme, Visual Basic, Lean, LLVM IR | |
| 7 | CodingBat | 7.0 | Free plan | Free | Yes | practice | Java, Python | |
| 8 | HackerEarth Assessments | 7.0 | Free plan | Free | Yes | |||
| 9 | Yandex Contest | 7.0 | Free plan | Free | Yes | contests | Bash, C, C#, C++, Dart, Delphi, D, Free Basic, Free Pascal, Go, Haskell, Java, JavaScript, Kotlin, Kumir, Lua, OCaml, PascalABC.NET, Perl, PHP, Python, R, Ruby, Rust, Scala, Swift, TypeScript | |
| 10 | beecrowd | 6.9 | Free plan | Free | Yes | practice | Python, Ruby, C#, Scala, Lua, JavaScript, C, Kotlin, C++, Haskell, OCaml, Pascal, Java, Dart, R, PHP, Swift, Clojure, Rust, Elixir, SQL | |
| 11 | CheckiO | 6.9 | $4.17/mo | Yes | 4.99 /mo | |||
| 12 | CodeChef IDE | 6.9 | Free plan | Free | Yes | |||
| 13 | Codeforces | 6.9 | Free plan | Free | Yes | contests | C, C++, C#, D, Delphi, F#, Free Pascal, Go, Haskell, Java, JavaScript, Kotlin, Node.js, OCaml, PascalABC.NET, Perl, PHP, PyPy, Python, Ruby, Rust, Scala | |
| 14 | Codility | 6.9 | No | $100/mo | No | |||
| 15 | CSSBattle | 6.9 | Free plan | $4.90/mo | Yes | 4.9 /mo | practice | HTML, CSS |
| 16 | SQLZoo | 6.9 | Free plan | Free | Yes | practice | SQL Server, Oracle, MySQL, DB2, Mimer, PostgreSQL, SQLite, Access | |
| 17 | DOMjudge | 6.7 | Free plan | Free | Yes | |||
| 18 | Frontend Mentor | 6.7 | Free plan | Free | Yes | |||
| 19 | GeeksforGeeks Practice | 6.7 | Yes | practice | C, C++, Java, Python, JavaScript, C# | |||
| 20 | TestDome | 6.7 | No | No | ||||
| 21 | Coderbyte | 6.6 | No | $99/mo | No | |||
| 22 | Project Euler | 6.6 | Free plan | Free | Yes | |||
| 23 | Codewars | 6.5 | $2/mo | Yes | ||||
| 24 | Kattis | 6.5 | Yes | |||||
| 25 | NextJudge | 6.5 | contests | C++, C, Python, PyPy, Java, JavaScript, TypeScript, Go, Rust, Ruby, Lua, Kotlin, Haskell |
Is your platform on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.