5,000+ problems, real-time 1v1 battles, and an AI-powered workspace — one platform to Code, Compete, and Create.
From learning to shipping
Follow the natural evolution of an AlgoArena operator.
Learn to think like a developer.
Join live CS classrooms led by educators or grind through 5,000+ interactive puzzles. Build a rock-solid foundation in logic and problem-solving.
Explore Classroom
See how you stack up.
1v1 coding battles, Puzzle Rush speedruns, and bracket tournaments. Every match is ranked, every win shapes your global standing.
Explore Compete
Prove it when it counts.
Administer and take AI-native Online Assessments built for the modern era. Companies track how candidates reason, debug, and collaborate with AI — candidates practice in the same environment they'll be tested in.
Explore OA
Ship real software.
Use our Agentic Workspace to turn your ideas into real applications. Zero configuration, instant execution.
Explore Builder
Every type of challenge
From classic algorithm puzzles to open-ended system design and AI building challenges. One platform, limitless ways to grow.
Classic data structure and string manipulation problems across all difficulty levels.
Traversals, shortest paths, MST, topological sort, and advanced graph theory.
Memoization, tabulation, knapsack variants, and optimization problems.
Architecture, API design, database modeling, and scalability challenges.
Multi-file debugging, unit test suites, and real-world codebase challenges.
Prompt engineering, agentic workflows, and AI-assisted application development.
Rapid-fire visual logic puzzles. Read the code, trace the state, output the answer.
Greedy algorithms, number theory, combinatorics, and proof-based challenges.
Stay in the loop
Get notified about platform updates, new features, coding tips, and exclusive content for our community.
AlgoArena Newsletter
Live updates on battles & training
Ready to get started?
Join AlgoArena to compete, learn, and prove your CS skills. Create your free account today.
What 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.