Codeforces vs Codewars
Codeforces
codeforces.com
Codewars
codewars.comSide by side
| Figure | Codeforces | Codewars |
|---|---|---|
| Price from | Free | $2/mo |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 1 | 3 |
| Spec score · Coding Challenge Platforms | 7.8 (#15) | 8.2 (#7) |
| API | The API provides some Codeforces data as machine-readable JSON through HTTP requests. | Codewars API v1 exposes public JSON endpoints without authentication for user, completed challenge, authored challenge, and kata information. |
| Security | The privacy policy says the data controller takes appropriate security measures to prevent unauthorized access, disclosure, modification, or destruction of data. | Codewars says it uses physical, technical, organizational, and administrative security measures appropriate to the personal data and its processing, while noting no internet transmission or storage method is completely secure. |
Plans
Codewars
- Codewars Red Monthly$5 a month
- Codewars Red Semi-annual$24 a year
- Codewars Red Annual$40 a year
In their own words
Codeforces
Codeforces is a programming-contest community and platform where regular contests give participants a way to solve problems and earn skill ratings. The site says it organizes approximately six contests each month, with free participation open to everybody. In contests following Codeforces rules, participants gain points for solving problems quickly and can test other contestants’ solutions through hacks. Ratings use a modified Elo system, and contestants are split into two divisions. The online judge checks submissions against prepared tests and tests suggested through hacks, then returns a verdict. Past contests are available for practice, while the site says learning content and training features are in development. Codeforces also offers an API that returns some data as machine-readable JSON over HTTP. Public data can be requested anonymously; private user data requires an API key. API requests are limited to one every two seconds, and faster calls receive a call-limit error. The service is free and available on web and through an API.