AtCoder vs beecrowd

AtCoder is a free web service for competitive programming contests and practice. Users solve programming problems in Algorithm Contest and Heuristic Contest formats, and can run source code in a browser rather than setting up a local programming environment. Its practice library contains about 5,000 past problems with explanations, and it supports nearly all major programming languages, including C++, Python, Rust, Java, and C#. Beginner Contests take place weekly, Regular Contests about monthly, Grand Contests five to six times a year, and heuristic contests about monthly. Real-time participation in Algorithm or Heuristic contests changes a user's AtCoder rating. AtCoder Jobs lets users apply to companies using their rating for roles including internships and experienced positions. PAST is an online algorithm skills test available in Japanese and English, with problems updated every six months. AtCoder says it has about 200,000 registered users and about 10,000 participants in real-time contests weekly. Its terms limit members to one account and prohibit account sharing, lending, or transfer.

beecrowd is a web and API platform for practicing programming and connecting with opportunities. Users solve problems in languages including Python, Java, C++, Kotlin, and Rust, earn ranking points, unlock badges, and participate in open contests. The Academic offering lists AI-generated custom exercises and test cases, plus automated translation into English, Portuguese, and Spanish. Institutional Academic features include support for multiple professors, centralized data management, and LMS integration through LTI 1.3/Advantage, with single sign-on and automatic movement of grades and exercise results. The Academic Free individual plan costs nothing and includes one active subject, up to 20 students per subject, and 2,500+ programming challenges. Contest creation can be requested by contacting support at least seven working days ahead. API access requires a request to the beecrowd team and HTTPS; each application has a default limit of 100 requests per hour, which may change. Authorized applications can access problem information and, with user authorization, profiles and submissions. Code cannot currently be compiled directly on the portal.