Life & fun · alternatives · 2026

24 alternatives to Hack Arena

Capture the Flag

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1
Google Capture the Flag 2017▲152
Google's 2nd annual worldwide security competition
2017 · its alternatives →
2
The Secure Developer - Ep. #6, Developer War Games: Capture The Flag!▲70
Security for developers, covering tools and best practices.
2017 · its alternatives →
3
Hacktivate▲139
A capture-the-flag game teaching real cybersecurity skills
Oct 2025 · apps.apple.com · its alternatives →
4MM
March Madness for Hackers▲100
2014 · codersbracket.com · its alternatives →
5
Hacker Experience▲96
Online hacking simulation game
2014 · its alternatives →
6CH
Code.hackmit.org – Software for Hackathons▲140
2016 · code.hackmit.org · its alternatives →
7
Hacker News API▲318
Hacker News now has an API. Awesome. :)
2014 · its alternatives →
8HC
Hackerhunt – categorised curation of Show HN submissions▲335
2017 · hackerhunt.co · its alternatives →
9
Major League Hacking▲102
Find and compete at the best student hackathons in the world
2014 · its alternatives →
10HS
Hacking slot machines with a buttonhole camera and brute-force search▲421
2018 · github.com · its alternatives →
11
Hackevents▲188
The world's largest hackathon search engine 🚀
2016 · its alternatives →
12
TankDuels▲55
Choose your flag and face off against other players!
2016 · its alternatives →
13
HackerBracket▲219
A community for sharing hacks
2014 · its alternatives →
14
hack.css▲174
The CSS framework for hackers
2016 · its alternatives →
15
Ha.ckathon▲170
Find the right Hackathons for you!
2016 · its alternatives →
16
Detectify▲124
Go hack yourself!
2014 · its alternatives →
17
I made open source, zero power PCB hackathon badges▲158
I love getting cool swag from hackathons and I also love designing PCB's, so when my friend asked me if I would design hackathon badges for a large game jam in singapore, I was absolutely down! The theme of overglade was a "The game jam within a game", pretty cool concept right! High schoolers from around the world were flown out to the event by hackclub after they spent about 70 hours designing their own game. These badges needed to be really cheap and simple, because we were going to manufacture about a hundred in a pretty limited amount of time. I went with a zero-power approach, which…
Apr 2026 · github.com · its alternatives →
18
Crowdcurity▲104
Crowdsourced Application Security
2015 · its alternatives →
19
Hack Club▲182
Free and open source high school coding clubs 👊💥
2016 · its alternatives →
20
hackajob▲89
Get Hired by Hacking
2015 · its alternatives →
21HE
Highlighting Efforts of Creation from Hacker News▲149
2013 · medium.com · its alternatives →
22
Templarbit▲144
Security for modern teams running software
2017 · its alternatives →
23
Sec Arcade▲3
The home of competitive hacking.
2022 · its alternatives →
24AC
A CTF challenge that let's you attack an LLM-based agent▲5
Hello HN, given the recent interest in the security vulnerabilities of agentic LLM apps, we would love to hear everyone's thoughts on a Capture The Flag (CTF) challenge we built. The challenge is designed to test the robustness of LLM-based agent systems, showcasing how an attacker can extract sensitive information from the system. The challenge is part of the Invariant Summer '24 CTF series, where participants can play the challenge and compete for a prize pool of $1000. Let us know what you think and what attacks you tried. We are also open to any feedback on how we can improve with the…
2024 · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →