Codewars offers community-created coding exercises called kata, with practice across more than 55 programming languages.
30 Seconds of Code vs Build your own X
How do 30 Seconds of Code and Build your own X compare? Here are the facts side by side: pricing, platforms, open-source status and what each one is for.
| Directory detail | 30 Seconds of Code | Build your own X |
|---|---|---|
| What it is | 30 Seconds of Code offers hundreds of short coding articles to help readers practice programming skills. | Build Your Own X teaches programming by guiding readers through recreating familiar technologies. |
| Website | ||
| Type | Website | Open-source project |
| Topic | ||
| Pricing | Not confirmed | Not confirmed |
| Platforms | Web | Not recorded |
| Open source | Not stated | Not stated |
| Language | English | English |
| Alternatives |
Other options to consider
Sites similar to both 30 Seconds of Code and Build your own X.
CodeAbbey offers programming problems for practice, with recent challenges and a programming certificate.
Coding Problems provides solutions to coding and algorithm problems and multiple programming exercises.
AtCoder hosts online programming contests, including beginner and heuristic contests, with practice contests for new users.
Hacksplaining teaches secure coding through interactive browser lessons covering OWASP Top 10 and GenAI threats.
Rosetta Code presents solutions to the same programming tasks in multiple languages for comparison.







