AtCoder

Name: AtCoder
Brand: AtCoder

Unclaimed

Compete in programming contests, improve coding skills, and climb the global ranking ladder.

Learning & Training Developer Tools Testing & QA

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Tracked since2026

0 reviews tracked

The 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?

Editorial review

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

LCLouis CorneloupUpdated May 26, 2026 · how we evaluateSourceatcoder.jp ↗

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

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)

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AtCoder FAQ

What is AtCoder?

AtCoder is an online platform that hosts competitive programming contests. Users solve algorithmic and heuristic problems within a time limit, earning ratings and rankings based on their performance.

How much does AtCoder cost?

Based on the provided content, AtCoder appears to be free to use, as there is no mention of any pricing plans or subscription fees for participating in contests or accessing rankings.

Is AtCoder free?

Yes, AtCoder appears to be a free platform. There is no indication of any paid tiers or subscription requirements for participation in contests or using its core features.

Who is AtCoder for?

AtCoder is for competitive programmers of all skill levels, from beginners looking to practice and learn, to experienced coders aiming to improve their algorithms, problem-solving skills, and global ranking.

Source: atcoder.jp

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