Kattis
Thousands of programming problems to solve and compete on

Kattis is an online competitive programming platform hosting thousands of algorithmic and mathematical problems for users to solve. It features a ranked leaderboard where individuals and affiliations (universities, countries) can compete based on cumulative scores. Users can register for free and immediately start solving problems across a range of difficulties.
Users register, browse problems categorized by difficulty, submit solutions that are automatically judged, and earn points that contribute to global, institutional, and national rankings.
students, competitive programmers, and software developers interested in algorithmic problem-solving
Background.
- Status
- launched
- Business model
- freemium
Contact
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