CTFd/CTFd

Health v2 · maintenance only

Adoption not part of the score

6807 stars · 2743 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

CTFd is an open-source Capture The Flag (CTF) platform built on Flask for hosting cybersecurity competitions and workshops. It provides challenge management, dynamic scoring, team and user administration, scoreboards, and extensibility through plugins and themes.

Use cases

• host a capture the flag competition
• run a cybersecurity workshop for students
• create and manage CTF challenges with flags and hints
• track team scores on a live scoreboard
• self-host a CTF platform with Docker
• run individual or team-based security competitions
• customize a CTF platform with plugins and themes

When to choose

• you need a full-featured, self-hostable CTF platform with an admin interface
• you want customizable scoring, team management, and scoreboard features out of the box
• you need plugin and theme extensibility for custom challenge types
• you are organizing anything from a small workshop to a large competition

When to avoid

• you need a general-purpose learning management system rather than a CTF platform
• you want a fully managed solution without any self-hosting responsibility and prefer not to use the hosted offering
• your event is not competition-based, e.g. simple quiz delivery without scoring

Facets

application · maturity active

web-framework auth plugin-system self-hosted developer-tools security education web-development self-hosted python self-hosted capture-the-flag ctf-platform scoreboard flask cybersecurity-training competition-platform docker web-server linux

Member repositories

For agents

markdown · JSON · MCP: product_card(name="CTFd/CTFd")