CTFd
Open-source capture the flag framework for hacking competitions
CTFd is an easy-to-use, customizable platform for running capture the flag competitions, with challenge management, scoring, teams, and a public scoreboard. It is widely self-hosted for security training events and game-based learning.
Key features
- CTF competition hosting
- Challenge and team management
- Live scoreboard
- Plugin and theme system
Strengths
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Mature project with 6.9k GitHub stars
- Written in Python
CTFd replaces
Similar game servers apps
Mindustry
Game ServersTower-defense and factory game with servers
Replaces Factorio
Lichess
Game ServersOpen-source chess server and platform
Replaces Chess.com
OpenRCT2
Game ServersOpen-source remake of RollerCoaster Tycoon 2
Replaces RollerCoaster Tycoon
papermc-docker
Game ServersContainerized Minecraft Java server image
Replaces Minecraft Realms
ArchiSteamFarm
Game ServersTool for farming Steam cards from multiple accounts
Replaces Idle Master
2048
Game ServersSelf-hostable browser version of the 2048 sliding puzzle
Replaces Mobile puzzle games