Codewars offers community-created coding exercises called kata, with practice across more than 55 programming languages.
Codility
vs30 Seconds of Code
Codility vs 30 Seconds of Code
How do Codility 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 | Codility | 30 Seconds of Code |
|---|---|---|
| What it is | Codility Developer Training offers hands-on programming lessons, including exercises on topics such as binary gaps. | 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 | English |
| Alternatives |
Other options to consider
Sites similar to both Codility and 30 Seconds of Code.
Hacksplaining teaches secure coding through interactive browser lessons covering OWASP Top 10 and GenAI threats.
Freemium
24 alternativesCodeAbbey offers programming problems for practice, with recent challenges and a programming certificate.
AtCoder hosts online programming contests, including beginner and heuristic contests, with practice contests for new users.
HackerRank is a coding test and interview solution for hiring developers.
Rosetta Code presents solutions to the same programming tasks in multiple languages for comparison.







