Open Source Alternatives to Challonge

A tournament management platform that provides tools for organizing competitions across various games and sports. The software supports multiple formats including single and double elimination, round robin, Swiss, and group stages. It allows organizers to manage sign-up pages, team rosters, seeding, and player ratings based on the Elo system. The platform includes features for bracket pick-em contests, voting, and match statistics tracking across seasons. It is deployed as a web-based SaaS and offers an API for integration into external websites, games, and bots. The service is designed for individual organizers, venues, and professional organizations to mobilize participants for frequent competitions. It provides a hub for managing multiple communities and events in one place. The platform supports participant limits up to 512 people per tournament on paid tiers.

Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to Challonge give you an option you fully own. You can self-host them, so your data stays on infrastructure you control. This page lists 1 open source alternative to Challonge. The most popular is Bracket. It uses the AGPL-3.0 license and ships an official Docker image.