AtCoder
Claim this toolCompete in programming contests, improve coding skills, and climb the global ranking ladder.
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Tracked since2026
0 reviews tracked·1 press mentionThe Bottom Line
Entry price
Free, no paid tier
Biggest pro
Offers a wide range of contest types for different skill levels (Beginner, Regular, Grand, Heuristic).
Biggest con
Information about specific problem types or learning resources is not directly visible on the homepage.
TL;DR - AtCoder
- Hosts regular competitive programming contests for all skill levels.
- Features a global ranking system for both algorithm and heuristic contests.
- Provides a platform for practicing problem-solving and coding skills.
Pricing: Free forever
Best for: Individuals & startups
What is AtCoder?
AtCoder is an online platform dedicated to competitive programming. It hosts a variety of contests, including AtCoder Beginner Contests (ABC), AtCoder Regular Contests (ARC), AtCoder Grand Contests (AGC), and AtCoder Heuristic Contests (AHC), catering to programmers of all skill levels. Participants solve algorithmic problems within a time limit, with their performance contributing to a global rating system.
The platform is designed for anyone looking to hone their problem-solving and coding abilities, from beginners to seasoned competitive programmers. It provides a structured environment to practice, learn new algorithms, and benchmark skills against a global community. The detailed ranking system and regular contests offer continuous opportunities for improvement and recognition.
Available on: Web
Pros & Cons
Pros
- Offers a wide range of contest types for different skill levels (Beginner, Regular, Grand, Heuristic).
- Provides a clear rating system and global rankings to track progress and compare with others.
- Regularly updated with new contests and announcements, keeping the platform active and engaging.
- Includes practice contests for first-time users and library testing.
Cons
- Information about specific problem types or learning resources is not directly visible on the homepage.
- The focus is heavily on competitive programming, which might not appeal to all developers.
Key Features
Upcoming and Recent Contest ListingsPermanent Practice ContestsGlobal Algorithm RankingGlobal Heuristic Ranking (GP30)Contest Announcements and Rule UpdatesNew Judge SystemGenerative AI Rules for Contests
Pricing Plans
Pricing checked Jul 9, 2026
Participation
Free
- Access to AtCoder Regular Contest (ARC)
- Access to AtCoder Weekday Contest (AWC)
- Access to AtCoder Beginner Contest (ABC)
- Access to AtCoder Heuristic Contest (AHC)
Reviews
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AtCoder FAQ
How does AtCoder support different programming skill levels?
AtCoder offers a range of contest types, including AtCoder Beginner Contests (ABC), AtCoder Regular Contests (ARC), AtCoder Grand Contests (AGC), and AtCoder Heuristic Contests (AHC), to accommodate programmers from beginners to advanced competitors. This variety allows users to find challenges appropriate for their current abilities.
Which teams would benefit most from using AtCoder?
AtCoder is ideal for teams or individuals focused on improving algorithmic problem-solving and competitive programming skills. It serves as a strong platform for developers in roles that require robust logic and efficient coding, such as those in software development or technical interviewing preparation.
How is AtCoder priced?
AtCoder is completely free to use, offering all its features and contests without requiring any paid plans. This makes it accessible for anyone looking to engage in competitive programming and improve their skills.
What kind of competitive programming contests does AtCoder host?
AtCoder hosts various competitive programming contests, including AtCoder Beginner Contests (ABC), AtCoder Regular Contests (ARC), AtCoder Grand Contests (AGC), and AtCoder Heuristic Contests (AHC). These contests involve solving algorithmic problems within a set time limit.
How does AtCoder compare to Codeforces?
AtCoder, like Codeforces, provides a platform for competitive programming with a global rating system to track progress and compare skills. AtCoder distinguishes itself by offering specific contest types like AtCoder Grand Contests and AtCoder Heuristic Contests, catering to a broad spectrum of programming challenges.
What are the primary limitations of using AtCoder?
The primary limitation of AtCoder is its heavy focus on competitive programming, which may not align with the interests of all developers. Additionally, detailed information about specific problem types or learning resources is not prominently featured on the homepage.
Can users practice on AtCoder without participating in live contests?
Yes, AtCoder provides opportunities for practice, including practice contests for first-time users and library testing. This allows individuals to hone their skills and familiarize themselves with the platform outside of scheduled competitive events.
Source: atcoder.jp