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AI · alternatives · 2026

24 alternatives to FullHunt– A new platform to discover all your Internet-connected assets

We built FullHunt Agentic AI, an autonomous tool that maps an organization’s internet-facing assets and possible attack paths in seconds. It automatically discovers exposed assets, correlates CVEs (EPSS, CISA KEV, FullHunt data), and produces a prioritized action plan. Try a prompt like: "Discover the attack surface of acme.com and identify possible attack paths."

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 2 we have checked on their own sites, 2 of them free or with a free tier. FullHunt– A new platform to discover all your Internet-connected assets launched in 2021; newer entries below may have overtaken it.

  1. 1
    OpenHunt▲154

    AI-native launch layer for the post-algorithm internet

    Feb 2026 · openhunt.dev · its alternatives →

  2. 2
    AnySearch▲613

    Real-time structured search trusted by agents and developers

    Jul 2026 · anysearch.com · its alternatives →

  3. 3

    Creator 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 →

  4. 4

    Our most accurate Search API for AI agents.

    Jul 2026 · docs.firecrawl.dev · its alternatives →

  5. 5
    Web Search Agents by Nimblefree tier, from $208.33/mo▲371

    Self-learning agents automate web research + retrieval

    Aug 2026 · nimbleway.com · its alternatives →

  6. 6

    Scan your website to see how ready it is for AI agents.

    Apr 2026 · isitagentready.com · its alternatives →

  7. 7

    AI-powered database of 40k+ investors to raise your capital

    2019 · investorhunt.co · its alternatives →

  8. 8
  9. 9
    Fabraix▲196

    We built Adversarial Cost to Exploit (ACE), a benchmark that measures the token expenditure an autonomous adversary must invest to breach an LLM agent. Instead of binary pass/fail, ACE quantifies adversarial effort in dollars, enabling game-theoretic analysis of when an attack is economically rational. We tested six budget-tier models (Gemini Flash-Lite, DeepSeek v3.2, Mistral Small 4, Grok 4.1 Fast, GPT-5.4 Nano, Claude Haiku 4.5) with identical agent configs and an autonomous red-teaming attacker. Haiku 4.5 was an order of magnitude harder to break than every other model; $10.21 mean…

    May 2026 · fabraix.com · its alternatives →

  10. 10
    oghunt▲250

    Discover real products, no AI slop

    2025 · oghunt.com · its alternatives →

  11. 11
    Trails▲81

    Hey all, Justin here. I previously built Phind, the AI search engine for developers. One of the biggest problems we had there was figuring out what went wrong with bad searches. We had tons of searches per day, but less than 1% of users gave any explicit feedback. So we were either manually digging through searches or making general system improvements and hoping they helped. This problem gets harder with agents. Traces are longer and more complex. It takes more effort to review them, so I'm building a tool that lets you analyze LLM outputs directly to help developers of LLM apps and agents…

    Jan 2026 · trails-red.vercel.app · its alternatives →

  12. 12
    Viberia▲146

    Hey HN, This is my take on the agent harness. Everything on an isometric map. Agents are grouped into "buildings" that run in a sequence or a loop; e.g., the CodeForge has an agent that writes a PRD, another one that implements, and a third that reviews. Everything is customizable, you build your own buildings/teams however you want. It's a Tauri app, really light (about 8x less energy than the closest competitor I benchmarked, so it actually runs from a coffee shop on battery). It's macOS only for now, but ping me if you are willing to test the Windows or Linux version. I've been…

    May 2026 · getviberia.com · its alternatives →

  13. 13

    Anthropic and OpenAI's publicly available models are explicitly guard-railed so that they refuse offensive tasks. And their cyber-focussed models are gated for enterprises. This leaves SMEs and mid market open to major vulnerabilities. AI can be used as both an adversarial and defensive tool in the world of cyber. A worst case outcome is if only the adversaries have access. Meanwhile, most existing AI cyber tools are just wrappers. The problem is that they still have all the guardrails on from the foundation model where they will inherit its refusals. For this project we've post-trained a…

    Jun 2026 · argusred.com · its alternatives →

  14. 14

    We built a computer use agent once and got it benchmarked at the 2nd position in the biggest benchmark for this field but in the process, we realized one thing, how outdated and inefficient these benchmarks are and how they don't truly capture how these tasks went. So we thought a community led benchmarking arena would be the way to go about. https://coarena.ai/. You just have to put in a task and two side by side windows with hidden models will show up and do the same task and at the end you vote which one did better(or none). We have a leaderboard where we rank all the…

    Aug 2026 · coarena.ai · its alternatives →

  15. 15
    Desearch▲113

    First Decentralized AI Search for Builders & Agents

    2025 · desearch.ai · its alternatives →

  16. 16

    AI agents now have impressive reasoning capabilities. This raises an important question: how dangerous are these AI agents at identifying & exploiting web vulnerabilities? We created CVE-bench to find out (I'm one contributor of 16). To our knowledge CVE-bench is the first benchmark using real-world web vulnerabilities to evaluate AI agents' cyberattack capabilities. We included 40 CVEs from NIST's database, focusing on critical-severity vulnerability (CVSS > 9.0). To properly evaluate agents’ attacks, we built isolated environments with containerization and identified 8 common attack…

    2025 · github.com · its alternatives →

  17. 17

    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 →

  18. 18

    Find & Close Your Next Web Client in Minutes

    Jun 2026 · webhunt.ai · its alternatives →

  19. 19BW

    I remember watching the AlphaGo documentary in 2017. What stood out to me was that the model got drastically better when it started competing against itself. GANs clicked for me similarly: a generator and discriminator competing, and somehow the competition is what produces something remarkable. I've been curious whether this principle generalizes to today's agents. So mehulkalia and I built Browser Brawl at the YC / BrowserUse hackathon last weekend and won first place. It is a fun experiment in which an attacker agent tries to complete tasks on live websites while a defender agent…

    Mar 2026 · browser-brawl.com · its alternatives →

  20. 20

    Open-source malware scanner and runtime guard for AI agents

    Jul 2026 · panguard.ai · its alternatives →

  21. 21

    Your website has new visitors. AI agents from ChatGPT, Perplexity, Claude and other LLMs are reading your content. Track the share of AI agent vs. human traffic and optimize for the agentic web.

    Jan 2026 · aisearchindex.com · its alternatives →

  22. 22

    Hey HN, AI agents are all the buzz right now, but how many of them are accessing your website today? That's what we built AgentShield to answer. Most of our users didn't know they had agent traffic until seeing them in our dashboard. You can see traffic broken down by humans, bots, and AI agents. Installation can be as simple as a JS pixel, and it's free. We're currently building out the paid component that will let you block specific agents or types of traffic. Feedback welcome: What else would you want to know about AI agents visiting your site?

    2025 · kya.vouched.id · its alternatives →

  23. 23

    A fintech Networking Platform to launch products easily.

    2023 · play.google.com · its alternatives →

  24. 24
    Runwallfree tier▲9

    A Runtime security layer that lets AI agents execute safely

    Jul 2026 · runwall.vercel.app · 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 →