CodeAbbey offers programming problems for practice, with recent challenges and a programming certificate.
Kattis
Kattis provides a problem archive for users to practice programming challenges.
About Kattis
Kattis is a web-based platform that hosts an archive of programming problems for coding practice. Users can register for an account to access thousands of challenges, which are sorted by difficulty and assigned point values. The site also maintains public ranklists tracking top individual users, affiliated universities, and country-level performance.
Key features
- Thousands of programming problems with difficulty ratings
- Point values assigned to each programming challenge
- Public individual user score ranklist
- University and institution affiliation rankings
- Country-level programming performance rankings
Best for: Students, hobbyist programmers, and coding competition participants seeking programming practice problems.
Good for
- Hosts thousands of programming problems for practice
- Problems include difficulty labels and point values
- Public ranklists cover individual, institutional, and country performance
Kattis at a glance
- Website
- open.kattis.com
- Category
- Education & Learning › Learn to Code
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Kattis alternatives
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EMKC offers practical coding challenges and contests that can be completed in any of 17 programming languages.
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Kattis FAQ
What is the main content offered on Kattis?
Thousands of programming problems for users to practice coding skills.
What types of public rankings does Kattis provide?
Rankings for individual users, affiliated institutions, and countries.
Is an account required to solve problems on Kattis?
New users must register for an account to start solving problems.
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