Codewars offers community-created coding exercises called kata, with practice across more than 55 programming languages.
AtCoder
vs30 Seconds of Code
AtCoder vs 30 Seconds of Code
How do AtCoder and 30 Seconds of Code compare? Here are the facts side by side: pricing, platforms, open-source status and what each one is for.
| Directory detail | AtCoder | 30 Seconds of Code |
|---|---|---|
| What it is | AtCoder hosts online programming contests, including beginner and heuristic contests, with practice contests for new users. | 30 Seconds of Code offers hundreds of short coding articles to help readers practice programming skills. |
| Website | ||
| Type | Website | Website |
| Topic | ||
| Pricing | Not confirmed | Not confirmed |
| Platforms | Web | Web |
| Open source | Not stated | Not stated |
| Language | — | English |
| Alternatives |
Other options to consider
Sites similar to both AtCoder and 30 Seconds of Code.
CodeAbbey offers programming problems for practice, with recent challenges and a programming certificate.
NeetCode offers coding interview practice through courses, assessments, head-to-head mode, and a catalog of programming problems.
EMKC offers practical coding challenges and contests that can be completed in any of 17 programming languages.
Exercism offers practice and mentoring across 83 programming languages.
Free
24 alternatives
Rosetta Code presents solutions to the same programming tasks in multiple languages for comparison.