Toph hosts competitive programming contests and problems on algorithms and data structures, with a community for participants.
AtCoder
AtCoder hosts online programming contests, including beginner and heuristic contests, with practice contests for new users.
About AtCoder
AtCoder is a programming contest site for anyone from beginners to experts that holds weekly programming contests online. It publishes upcoming, recent and daily contest schedules across Beginner, Regular, Grand, Heuristic and Weekday categories. First-time users can use a practice contest, including library testing, and the site shows separate Algorithm and Heuristic rankings.
Pricing is not clearly stated.
Key features
- Lists upcoming, recent and daily contests with start times
- Covers Beginner, Regular, Grand, Heuristic and Weekday contests
- Provides practice contest for first-time users
- Provides AtCoder Library Practice Contest for library testing
- Shows separate Algorithm and Heuristic rankings
Best for: Beginners to experts who want regular online programming contests.
AtCoder at a glance
- Website
- atcoder.jp
- Category
- Education & Learning › Learn to Code
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Details verified
- Oct 22, 2026 · Official source
- Open source
- Not stated
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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