Accenture
MathTwo PointersRecursion
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Programming still matters. Train, teach, and test coding and AI skills.
8,000+
judged practice problems
17
programming languages
Bryn Mawr
CS classroom pilot
Company patterns
Practice what real interviews repeatedly test.
Hover a company to see the patterns AlgoArena uses to prepare you for interviews at companies like these.
Infosys
BacktrackingRecursionBinary Search
IBM
Prefix SumBit ManipulationTwo Pointers
Visa
MatrixHeap (Priority Queue)Counting
Palantir
Graph TheoryBinary SearchSliding Window
J.P. Morgan
CountingHeap (Priority Queue)Greedy
Yelp
BacktrackingTrieRecursion
Intuit
Breadth-First SearchMatrixTree
EPAM Systems
Two PointersRecursionCounting
Flipkart
Graph TheoryHeap (Priority Queue)Breadth-First Search
Apple
TreeBreadth-First SearchDepth-First Search
Capital One
TrieSimulationMatrix
Snap
Graph TheoryBreadth-First SearchDepth-First Search
Oracle
TreeDepth-First SearchBreadth-First Search
Nvidia
RecursionLinked ListHeap (Priority Queue)
PayPal
CountingBinary SearchBacktracking
Coupang
RecursionHeap (Priority Queue)Breadth-First Search
Microsoft
TreeDepth-First SearchBacktracking
Snowflake
Graph TheoryDepth-First SearchTree
Wix
TreeRecursionDepth-First Search
Dropbox
BacktrackingGraph TheoryTrie
Palo Alto Networks
TreeLinked ListRecursion
Meta
TreeDepth-First SearchBreadth-First Search
Zoho
BacktrackingMatrixRecursion
Autodesk
TrieSimulationLinked List
Arista Networks
RecursionLinked ListBacktracking
Qualcomm
RecursionLinked ListBit Manipulation
TCS
DatabaseTwo PointersRecursion
Goldman Sachs
BacktrackingRecursionHeap (Priority Queue)
PhonePe
Breadth-First SearchDepth-First SearchGraph Theory
TreeGraph TheoryBacktracking
Salesforce
Graph TheoryTreeHeap (Priority Queue)
Paytm
Two PointersPrefix SumStack
ServiceNow
Breadth-First SearchRecursionBacktracking
Cisco
RecursionBacktrackingMatrix
Cognizant
DatabaseRecursionMath
Tesla
Breadth-First SearchGraph TheoryDesign
Citadel
BacktrackingBreadth-First SearchHeap (Priority Queue)
TikTok
BacktrackingTreeDepth-First Search
DoorDash
Breadth-First SearchDepth-First SearchTrie
Walmart
BacktrackingHeap (Priority Queue)Breadth-First Search
Bloomberg
TreeDepth-First SearchBacktracking
Morgan Stanley
CountingBacktrackingDynamic Programming
Amazon
TreeDepth-First SearchGraph Theory
Anduril
Breadth-First SearchDepth-First SearchTree
X (Twitter)
DatabaseHeap (Priority Queue)Recursion
Uber
Graph TheoryBreadth-First SearchDepth-First Search
Intel
RecursionCountingLinked List
TreeDepth-First SearchBreadth-First Search
Yandex
Sliding WindowTreeTwo Pointers
MongoDB
TrieDesignDepth-First Search
Netflix
Graph TheorySliding WindowHeap (Priority Queue)
BacktrackingBreadth-First SearchHeap (Priority Queue)
Huawei
BacktrackingRecursionStack
Train on the patterns
Patterns are measured from publicly reported interview data, not supplied by these companies. How we work this out. Logos are shown for identification only. AlgoArena is not affiliated with or endorsed by these companies.
Practice, build, teach, assess
Practice the fundamentals. Build with agents. Prove both.
Train across 8,000+ judged problems, live matches, and 17 languages. Then build with AI in a browser workspace where files, changes, and results stay visible. Classroom and assessment tools carry that same principle into settings with more at stake.
Practice and compete
LiveMaster the fundamentals in a real IDE, under real constraints.
Choose a problem or match, write code in the IDE, run judged tests, and use Rena for bounded help when the format allows it.
- 8,000+ practice problems
- Judged tests and submissions
- Solo practice and live matches
algoarena.net/product/competeLive practice product
Builder
LiveTell the agent what to make. Keep the work visible.
Move between the conversation, files, diffs, preview, and console in one browser workspace. Review changes before you keep them and take the project with you.
- Prompt to working files
- Inspect and reject changes
- Preview, version, and export
algoarena.net/product/builderIllustrative Builder interface
Classroom
Live pilotRun one room. See where the class actually gets stuck.
Launch quizzes and coding tasks, watch responses arrive, and debrief the concepts that need attention. Students solve full coding questions in the real AlgoArena IDE.
- Synchronized host and student views
- Multiple-choice and coding tasks
- Piloted in a Bryn Mawr College CS classroom
algoarena.net/product/classroomLive Classroom product
Assessments
Private preview · waitlistLet participants use modern tools. Keep the evidence attached.
Set an explicit AI condition for each task. Participants work in a real workspace while your team gets the evidence and makes the final decision.
- No-AI, Rena, and agentic conditions
- Evidence-linked review and replay
- Human-reviewed final decisions
algoarena.net/product/assessmentsIllustrative private preview
Choose your path
One platform, different stakes.
You do not need the whole platform to get value from it. Start with the workflow that matches what you are trying to do.
For developers
Practice fundamentals, compete live, or build with agents while keeping the code you create.
Start practicingOpen BuilderFor educators
Teach with live rooms, a reusable question library, bounded hints, and visible class feedback.
See educator toolsFor teams
Run assessments for hiring, hackathons, or training your own engineers. Define the AI policy, inspect work and replay, and keep the final judgment human.
See assessment toolsBook a callVisible work. Human judgment.
The result matters. So does how you got there.
Inspect the work
Open the files, diffs, tests, and evidence instead of trusting a polished answer.
Set the boundary
Decide what AI help is appropriate for the build, lesson, or assessment.
Keep people in charge
Feedback and automated signals inform the decision. They do not replace it.
Get a second opinion
Ask the AI you already use.
Tell any of these assistants what you want to do: build, practice, teach, or assess. Then ask why AlgoArena may fit. Each gets the same question and public sources, so the answer stays useful and verifiable.
Each link opens its assistant in a new tab.
Results are generated by independent third-party services and may vary. AlgoArena is not affiliated with or endorsed by OpenAI, Anthropic, Google, Perplexity, or xAI.
From our users
Sharpened in the arena
Developers, founders, and CS students on practicing, competing, and getting ready for the interviews that count.
“I interviewed at a Series A startup and the format was basically what AlgoArena trains you for. They didn't just test algorithms, they tested how I think about product and how well I use AI to build. That's how interviews actually work now. When I worked at Tesla and big techs, you're expected to use AI, no questions asked. AlgoArena is the only one I've found that actually measures the skill that matters today: how well you work with AI, not without it.”
Jaehoon Son
Co-Founder, tryhermes.dev · CS & Math @ Swarthmore
“Working on AlgoArena was a great experience. The team is building something genuinely focused on improving how people learn and practice problem solving. I especially liked the clarity of vision and the speed at which ideas were being tested and shipped. It's a strong foundation, and I'm excited to see how it evolves.”
Yashwanth S
Founder, Startup Metric · CS @ ACE Engineering
“AlgoArena has transformed how I prepare for technical interviews. The platform's ranked 1v1 battles provide that real-world 'pressure' you can't get from standard coding sites. The AI-powered code analysis is a game-changer. It didn't just tell me my solution was wrong; it helped me understand the 'why' behind my logic errors. If you're serious about leveling up your DSA skills, this is the most interactive way to do it.”
Nawin M S
Backend Developer · CSE @ Velammal
“AlgoArena has helped me manage my time better in solving logic puzzles, and it's a much less stressful resource than LeetCode. The practice interview helps me get a gauge at what a coding interview experience might look like, and helps me prep without having to memorize exactly what to say. It helps me build the tools for a successful interview.”
Keyla Peralta
CS & Chinese @ Swarthmore
“AlgoArena has helped me develop my software development skills, and features such as the 1v1 battles have helped me develop problem solving skills under pressure. It has helped specifically with interview prep via the mock interviews with Rena and also with the constant skill building features.”
Isaac Lee
CS & Engineering @ Swarthmore
“Really love the interface! I'm using it to build an app.”
Sarika Saiyara
Bryn Mawr College
“AlgoArena feels quite different from other platforms, and it's really exciting to explore. This platform is very new and makes coding feel like a game. Competing with others and solving problems within a time limit really helps improve our speed and prepares us better for coding interviews. I also like that the questions are presented in a different and interesting way. The gamified interface makes the whole experience much more enjoyable and keeps me motivated to practice more.”
Shaik Sariya Niyaz
Blockchain Intern, li2edu · CSE @ GPREC
“I really enjoyed problem solving on AlgoArena. Practicing in a competitive environment makes the DSA journey more engaging.”
Himanshu Singh
Java Backend Developer · MCA @ AKTU
“Legitimately stressful rushing to solve a LeetCode easy before your opponent. Fantastic interview prep. It definitely makes doing LeetCode problems more engaging and makes me try to finish them as fast as I can under pressure.”
Griffin Young
Principal Scientist, Schrödinger · CS @ Stanford
“I like how easy it is to jump into practice. The platform feels well organized, and the UI is great. Great work on building it!”
Yash Chaturvedi
Intern, DRDO · CSE @ MUJ
“What I like about the platform is that it gives me a good place to practice consistently instead of just solving random problems here and there. The problems have helped me think more about the logic and approach behind a solution rather than just trying to get the code working. Over time it has made me more comfortable with topics like recursion, sorting, arrays and other DSA concepts. I'd recommend it to other students who are trying to get better at problem solving and prepare themselves for coding interviews.”
Varun Shah
AI & Data Science @ DJSCE
