The arena for programming + AI skills.
Practice, run classrooms, evaluate candidates, and build real projects, all in one place.
[Code, Compete, Create]
10,000+ problems, 500+ users, 1,500+ matches played
Four ways to use AlgoArena
Practice, teach, hire, or build. Pick your path.
Practice and get better, fast.
Work through 10,000+ problems, Puzzle Rush speedruns, and 1v1 battles with ELO. Build fundamentals and sharpen instincts with feedback loops that keep you engaged.
Start practicing
Run a modern CS classroom.
Build classroom quizzes in minutes, host live sessions, and bring engagement to lecture halls without losing rigor.
Explore Classroom
Hire for real work in the AI era.
AI-native assessments that measure how candidates reason, debug, and ship, all inside a consistent in-browser workspace.
Explore Assessments
Ship real software.
Use our Agentic Workspace to turn your ideas into real applications. Zero configuration, instant execution.
Explore Builder
What students actually say
Real quotes from Prof. Michael Wehar's intro CS classroom sessions on AlgoArena.
It was fire. I think the extra steps before you start programming is tedious, but everything else was fire.
I liked it. It was cool to put our class practice to the test!
I think it was good. The problems were a bit hard but good learning with time limit and competition.
It was a good challenging experience. The time pressure helps us solve problems under pressure.
The real-time aspect makes learning actually fun. It's like LeetCode but with soul.
The competition modes are really fun.
I like the UI.
It was fire. I think the extra steps before you start programming is tedious, but everything else was fire.
I liked it. It was cool to put our class practice to the test!
I think it was good. The problems were a bit hard but good learning with time limit and competition.
It was a good challenging experience. The time pressure helps us solve problems under pressure.
The real-time aspect makes learning actually fun. It's like LeetCode but with soul.
The competition modes are really fun.
I like the UI.
Gained confidence in my ability to actually solve a problem.
I enjoyed it. I do not like timed things but this was good practice.
I found the user experience is really nice! I will come back to it for frontend inspiration.
Finally, a platform that understands that CS education should be interactive.
The matchmaking is spot on. I'm always pushed to my limit.
AlgoArena has completely changed how I prepare for technical interviews.
It helps review important ideas quickly and do some simple practice.
Giving more detailed descriptions of inputs/outputs would help first-time users.
I enjoyed working on easy problems. Improving some test cases and descriptions would make it even better.
Gained confidence in my ability to actually solve a problem.
I enjoyed it. I do not like timed things but this was good practice.
I found the user experience is really nice! I will come back to it for frontend inspiration.
Finally, a platform that understands that CS education should be interactive.
The matchmaking is spot on. I'm always pushed to my limit.
AlgoArena has completely changed how I prepare for technical interviews.
It helps review important ideas quickly and do some simple practice.
Giving more detailed descriptions of inputs/outputs would help first-time users.
I enjoyed working on easy problems. Improving some test cases and descriptions would make it even better.
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Create Free AccountWhat is AlgoArena?
AlgoArena is a platform for learning, practicing, building, and proving computer science skills. Whether you're a developer sharpening algorithms through real-time 1v1 coding battles, an educator running live CS classroom sessions, a non-technical creator learning to build with AI, or a company assessing talent with AI-native coding assessments. AlgoArena adapts to your goals.