AI · alternatives · 2026
24 alternatives to HackAI
Anyone can Hack with Just Prompt
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Playground▲198We build AI agents to find vulnerabilities in other AI agents. The playground started as an internal tool that we used to test our own offensive agent Nyx. But we realised that hacking an AI is about have as wide a distribution of attacks as possible, especially those which aren't in the distribution of the models. So we are launching playground as a platform to crowdsource agent jailbreaks. And although hacking AI is super fun and we are sure people will do it for free, we want to reward those who help us push forward the offensive frontier of AI. So we are committing $100K in prizes over…
Jul 2026 · playground.fabraix.com · its alternatives →
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Agent Arena▲348Creator here. I built Agent Arena to answer a question that kept bugging me: when AI agents browse the web autonomously, how easily can they be manipulated by hidden instructions? How it works: 1. Send your AI agent to ref.jock.pl/modern-web (looks like a harmless web dev cheat sheet) 2. Ask it to summarize the page 3. Paste its response into the scorecard at wiz.jock.pl/experiments/agent-arena/ The page is loaded with 10 hidden prompt injection attacks -- HTML comments, white-on-white text, zero-width Unicode, data attributes, etc. Most agents fall for at least a few.…
Jun 2026 · arena42.ai · its alternatives →
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Hacktivate▲139A capture-the-flag game teaching real cybersecurity skills
Oct 2025 · apps.apple.com · its alternatives →
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PromptCraft▲131AI Prompt in minutes for v0, Lovable & more
2025 · expireddomains.com · its alternatives →
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prompts.chat▲63Discover, collect, and share the best AI prompts for ChatGPT, Claude, Gemini, and more. Join the largest community of AI prompt engineers and creators.
Dec 2025 · prompts.chat · its alternatives →
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One prompt, one AI model, one shot. Write a single prompt, run it once with any model, and the result is your entry. Six winners take a GTA VI copy (first place a PS5 too), one of them chosen by community vote. Winners announced at the World Models & GenAI Mixer @ SIGGRAPH in LA on July 20.
Jul 2026 · 1shotchallenge.ai · its alternatives →
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Hi HN, I built this open-source LLM red teaming tool based on my experience scaling LLMs at a big co to millions of users... and seeing all the bad things people did. How it works: - Uses an unaligned model to create toxic inputs - Runs these inputs through your app using different techniques: raw, prompt injection, and a chain-of-thought jailbreak that tries to re-frame the request to trick the LLM. - Probes a bunch of other failure cases (e.g. will your customer support bot recommend a competitor? Does it think it can process a refund when it can't? Will it leak your user's address?) -…
2024 · promptfoo.dev · its alternatives →
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The ultimate workflow enhancement for prompt engineering
2023 · aipromptstudio.com · its alternatives →
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Hack Hands▲90Instantly connect with a qualified programming expert
2014 · pluralsight.com · its alternatives →
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Master cybersecurity with hands-on courses by industry experts. Learn pentesting, ethical hacking, and SOC operations through real challenges.
Jan 2026 · academy.subverted.io · its alternatives →
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chat.win▲8Prompting arena site where users win money breaking prompts and earn money creating them. Alternative to https://hackaprompt.com / https://app.grayswan.ai/arena, Open to feedback/improvements/bugs. - Uses USDC on polygon just like polymarket. - Fun and a good way to actually prove your prompting abilities. - See every attempt live as it's happening and improve from what your opponents are doing.
2025 · chat.win · its alternatives →
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We build runtime security for AI agents. The playground started as an internal tool that we used to test our own guardrails. But we kept finding the same types of vulnerabilities because we think about attacks a certain way. At some point you need people who don't think like you. So we open-sourced it. Each challenge is a live agent with real tools and a published system prompt. Whenever a challenge is over, the full winning conversation transcript and guardrail logs get documented publicly. Building the general-purpose agent itself was probably the most fun part. Getting it to reliably use…
Mar 2026 · github.com · its alternatives →
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When one AI is hit, all get stronger
2025 · projgasi.github.io · its alternatives →
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OSS vulnerability assessment to secure your GenAI Apps
2024 · prompt.security · its alternatives →
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Test AI with 1000s of chats in seconds
2025 · buildmyagent.io · 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 →