Sites using CTFd
Capture The Flag hacking competition and training platform.
Found via: StackScope Wider Web 14
CTFd has been detected on 14 launches we've crawled, with 9 of those in August 2026 (0.0% of the month's launches so far). Most recent detection was yesterday.
Domain endings using CTFd
14 sites
- .com 14.29%
- .online 14.29%
- .tech 14.29%
- .uk 14.29%
- .xyz 14.29%
- .ai 7.14%
- .dev 7.14%
- .org 7.14%
- .site 7.14%
Share of new sites using CTFd
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
Education leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 |
Find And Study
|
<0.01% | 9.96% | |
| #2 |
CTFd
Current page
|
<0.01% | 6.06% | |
| #3 |
GeoGebra
|
<0.01% | 5.19% | |
| #4 |
H5P
|
<0.01% | 3.90% | |
| #5 | New Learning Moodle Theme | <0.01% | 3.90% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Education tool. All 118 in Education →
Recent launches we can show
0 of the 14 sites using CTFd are product launches we list individually. The other 14 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
Every site we have found using CTFd came from crawling the wider web rather than a product launch, so there is nothing to list here. The 14 still count towards the figures above. How StackScope Discovery works