Eolymp

Eolymp brings programming practice, contest operations and teaching tools together. It is best suited to educators and organizers who need to author problems and manage participants, not just offer a puzzle collection. Its breadth is a strength; the main buying question is whether a plan’s per-seat cost and quotas fit the intended program.

Overview

From a database of practice problems to official competitions with thousands of participants, Eolymp spans individual learning and organized events. Its course tools add modules, learning materials, assignments and grades, making it a more natural fit for structured instruction than for casual solo practice. The service grew out of a website launched in 2007 to help people prepare for programming competitions.

Key features

Contests and problem authoring

Organizers can use IOI scoring for partial credit or ICPC scoring with time penalties. Synchronized contests suit events where everyone competes together; virtual contests give each participant an individual timer. Optional upsolving extends the contest into later practice. This is a useful range for programs that need both formal events and flexible training rounds.

Problem creation covers statements, tests, checkers, solutions, validators, interactors and generators, and organizers can import problems from Basecamp or Polygon. That toolkit supports more than assembling a question set: it gives contest teams control over the materials and evaluation components behind problems.

Courses and integrations

Courses combine modules, materials, assignments and grades. The API uses HTTPS and JSON, accepts API-key or OAuth 2.0 authentication, and has SDKs for Python, Go, PHP and JavaScript. Each space also has an MCP server for supported AI clients such as Claude and ChatGPT, with access governed by the signed-in user’s permissions.

Eolymp says its grading system can work with Moodle or Canvas, and spaces can connect to student information systems for login and account synchronization. Its language support includes C++, Python, Java, Go, Pascal, Haskell, Lisp, Assembly, PHP, JavaScript and C#. Solution explanations and custom challenges are also supported.

Pricing

Free Services cost nothing. They provide access to programming problems and educational materials, competition participation and automatic solution testing. This is a useful starting point for learners, but it is not a substitute for a dedicated institution’s contest, course and administration capacity.

Academic plan uses custom pricing, with case-specific discounts of 25% to 50% off the regular price for educational institutions and charitable organisations. Its quota can be adjusted to institutional needs, which is attractive for qualifying organizations whose usage does not fit a standard allocation.

Paid plans are priced per active user (seat), with custom pricing. Quotas vary by plan across contests, evaluations, courses, plagiarism analysis, upsolve, team contests, SSO, discussions, administrators, members and problems. This breadth makes a plan comparison essential: the right choice depends on both active seats and which activities the organization needs to run.

Custom offers a custom quota for needs not met by published plans; contact [email protected] for a configuration. A new space can be evaluated free for 30 days with five seats and the features of the selected plan, without payment details to start. That is a meaningful trial for a small evaluation group, though five seats may not represent a full institution or large contest team.

Platforms

Eolymp supports web and API access. The API’s HTTPS and JSON interface, authentication options and SDKs make it relevant to teams integrating contest or grading workflows; the web platform serves participants, organizers and instructors. The stated 99% monthly availability target covers the console, sign-in system, space websites and API, excluding scheduled and excused downtime.

The privacy notice identifies EOLYMP ACADEMY, S.L. in Barcelona and says it processes data under GDPR and Spanish data-protection law, with no planned international data transfers. Users with further questions can contact Eolymp through its feedback page.

Who it's for

Eolymp is a strong fit for schools, educational institutions and contest organizers that need problem authoring, automatic evaluation and course administration in the same environment. Its variable quotas and per-seat paid plans call for careful sizing by active users and activities. Individual learners can use Free Services for practice, but anyone who only wants a place to solve challenges may not benefit from the broader platform.

Pros and cons

Pros: Contest formats include IOI and ICPC scoring, synchronized and virtual modes, and optional upsolving, supporting different event structures.

Pros: Problem-authoring tools and imports from Basecamp or Polygon give organizers control over problem content and evaluation.

Pros: Course tools, LMS connections, student-system synchronization and API access make it suitable for institutional workflows.

Cons: Paid plans use per-active-user pricing and plan-dependent quotas, so organizations need to match seats and activities to a custom-priced tier.

Cons: The free 30-day evaluation is limited to five seats, which may be too small to assess a large program at full scale.

Alternatives

For a broader comparison, see Coding Challenge Platforms.

CodeSignal is worth considering for individuals: its free Individuals plan includes a built-in tutor, personalized skills paths, practice-based learning, bite-sized modules and a skills profile, with Android, iOS, web and API platforms.

HackerRank may suit a team focused on screening and interviews: its Starter plan is $165 a month, billed $1,990 billed annually, for one user, Screen and Interview, 2,000+ questions and 120 attempts per year, with additional attempts at $20 each.

Codility is another paid option, with a free trial and plans based on invite credits and platform users.

DMOJ is the alternative to consider for free public contest hosting; its private contest hosting is aimed at educational organizations.

GeeksforGeeks Practice offers a freemium option across Android, iOS and web.

HackerEarth Assessments may be a better fit for teams looking for a freemium assessment product; its Free plan includes five test invites, three interview invites and two admins, and unused invites do not carry over.

Edabit is a free web option where all challenges can be completed without charge.

AtCoder is a free web alternative for contest participation and browser-based source-code execution.

Verdict

Choose Eolymp if you are an educator or contest organizer who wants problem creation, evaluated contests and course tools under one roof, with API and LMS connections for institutional workflows. Its strongest case is the combination of contest operations and teaching features; look elsewhere if you need only individual practice or need predictable published pricing before committing.