The most advanced offensive engine, by far.
Most "AI red-teaming" tools automate your checklist - a catalog of known probes you wire up, run, and grade yourself. Nyx automates the attacker: it profiles your agent, improvises, and chains exploits over hundreds of turns, the way a human red-teamer would. Here's how it stacks up against the tools you're weighing.
No other tool goes as deep, autonomously.
Nyx improvises and chains attacks, sourced from every single jailbreak ever discovered, over hundreds of turns, the way a real attacker would.
| NyxFabraix | promptfooopen-source · joining OpenAI | LakeraGuard + Red · Check Point | MindgardDAST-AI · Lancaster spinout | SplxAIred-team + runtime · Zscaler | |
|---|---|---|---|---|---|
| Attack library | 10,000+ public jailbreaks + a private lab arsenal including yesterday's |
~157 open-source plugins versioned per release |
Private; generated per app |
Proprietary R&D catalog MITRE ATLAS–mapped |
5,000+ proprietary simulations continuously updated |
| Setup & wiring | Auto-discovers how to reach your agent zero wiring |
You configure endpoints, headers & providers |
Scoped engagement, wired to your app |
Manual endpoint wiring presets for hosted models |
Pick a connector, add endpoint & keys |
| How it attacks | Profiles, improvises & chains exploits over hundreds of turns fully autonomous |
Runs the strategies you select you pick; ~5-turn loops |
Attacks generated per app human-scoped engagement |
Prebuilt techniques you run one-shot & multi-turn |
Preset scenario sims across personas you configure the run |
| Agent coverage | Web, browser, voice, RAG & email agents out of the box |
Prompt, API, RAG, browser, MCP, multimodal |
Chat, RAG, tool-use agents, multimodal |
LLM, chatbot, API, image, audio, agents |
Chat, API, RAG, agentic; voice, image, docs |
| The outcome | AIVSS-scored severity per finding |
LLM-judge grading + CVSS-style scores |
Severity ratings + attack-success rate |
Severity mapped to MITRE ATLAS / OWASP |
Failure-rate by method + framework mapping |
| Reporting | Board-ready PDF pentest report, per finding into Slack/Email/Jira |
Findings dashboard, compliance cards, CI artifacts |
Pre-deployment report + remediation |
Dashboard + compliance-ready reports |
Dashboard + PDF; Jira / ServiceNow export |
| Deployment | Managed - with 24/7 founder support on a schedule in the cloud |
Open-source CLI (local/CI); SaaS + on-prem |
SaaS or self-hosted; pre-deploy + runtime |
SaaS; CLI, CI/CD, Burp |
SaaS + on-prem; CI/CD-ready |
Based on public product information, last reviewed July 2026. Every tool here is a serious, capable product, and positioning shifts quickly in this market - we've represented each one as fairly as we can. Spot something out of date? Tell us at founders@fabraix.com and we'll fix it.
A managed, autonomous adversary - not a tool you operate.
Nyx is an automated red-teaming AI agent, but three things set it apart in that category: it reaches surfaces most tools can't, it self-evolves into a better attacker against your system every time it runs, and its arsenal is private and always growing.
Pure blackbox
No integration, no source, no weights, no network access. Nyx reaches your agent the way your users do - an endpoint is enough.
Multi-surface
HTTP, browser, voice, and email - not just the prompt and API. It plants adversarial pages and drives voice agents on the fly.
Managed audit
We run it and hand you an AIVSS-scored report with reproduction and remediation - not one more dashboard to triage.
Private arsenal
A lab arsenal fed by live disclosures and a public break-the-agent challenge - not a catalog an attacker can read too.