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Rex

Detect suspicious activity, automate the investigation process, and take action before your systems are exploited.

Anomaly Detection

IntheeraofAI,itisinevitablethatsomewillexploitpoliciesorloopholesforpersonalgain.

With Rex, we ensure your products remain unaffected by business and operational risks.

Trusted by millions

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We provide best Features

There are risks that neither a single team nor an individual might be able to detect early on. Rex helps identify and promptly address such issues.

Detect

Rex detects potential threats and anomalies through requests made to your server in real time, enabling early prevention before any impact reaches your core infrastructure.

Sub-millisecond anomaly detection on incoming traffic
Real-time IP velocity & behavioral fingerprint correlation
Zero false-positive disruption for legitimate users

Rex conducts autonomous investigations by compiling forensic evidence, organizing findings into a hypothesis elimination matrix, and diagnosing the exact root cause.

Automated hypothesis matrix & evidence compilation
Deep cross-layer forensics (network, device & threat intel)
Reduces forensic diagnosis time from hours to under 30 seconds

Rex takes decisive, real-time action based on risk severity: autonomously neutralizing medium-risk threats, while escalating high-risk cases to your team with full evidence dossiers.

Autonomous containment for medium-risk incidents
Human-in-the-loop escalation with full SAR evidence packages
Instant malicious node quarantine without developer intervention

We building future of autonomous defense

There are risks that neither a single team nor an individual might be able to detect early on. Rex helps identify and promptly address such issues.

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How Rex works?

Detect.

Rex detects potential threats or anomalies through requests made to the server, enabling early prevention of any impact on the system.

Investigate.

Rex conducts his investigation by gathering information and evidence, organizing them into a matrix of hypotheses, and then using a process of elimination.

Action.

Rex will forward cases that pose a high risk to humans, while handling medium-risk cases himself.

Customers see instant result

Tom Sullivan

“Rex saved us over $180,000 in fraudulent chargeback fees in our first quarter alone. Our creator payouts are protected, and our merchant accounts have never been in better standing.”

Tom Sullivan

Head of Fraud Operations @ Gumroad

Gumroad
Jessica Lee

“Our onboarding conversion jumped 4.2% because we finally eliminated intrusive verification walls. Good users breeze through instantly, while malicious traffic gets contained behind the scenes.”

Jessica Lee

VP of Product @ Notion

Notion
Jenny Wilson

“My engineering team reclaimed 20% of their sprint capacity. We haven't had a single 2 AM emergency response for credential stuffing since, so we stay entirely focused on shipping our roadmap.”

Jenny Wilson

CTO @ Linear

Linear
Linda Carter

“Rex gives our enterprise partners absolute confidence that their transactions are secure. Protecting our platform ecosystem without adding a single millisecond of user-facing latency is priceless.”

Linda Carter

Head of Platform & Trust @ Stripe

Stripe

Flexible pricing for any scale

Includes:

  • Up to 50,000 requests / month
  • Real-time server anomaly detection
  • Manual case triage & investigation
  • 7-day forensic log retention
  • Slack & webhook alert integrations
Get started

Includes:

  • Up to 1,000,000 requests / month
  • AI-driven hypothesis matrix & auto-investigation
  • Autonomous medium-risk threat containment
  • Human-in-the-loop escalation workflows
  • 30-day forensic retention & audit exports
  • Priority email support (under 4h response)
Get started

Includes:

  • Up to 10,000,000 requests / month
  • Custom cognitive risk policies & ML baselines
  • Automated real-time IP & session quarantine
  • Full forensic telemetry graph & SAR evidence packages
  • 90-day tamper-proof audit retention
  • Unlimited team seats & granular RBAC
  • Dedicated Slack channel & 99.9% uptime SLA
Get started

FAQs

No. Rex is not a traditional security or firewall solution. Instead, Rex is an autonomous decision bot focused on analyzing user behavior, detecting suspicious telemetry patterns, and stepping in to contain anomalous actions before they affect your systems.
Rex is engineered to be exceptionally lightweight. It runs seamlessly on virtually any standard modern server environment (standard CPU instances) without requiring high-end, dedicated GPUs like typical local LLMs.
Never. Rex operates as an on-device decision engine rather than a generative LLM, so data scraping or leaks are architecturally impossible. All sensitive payloads are strictly encrypted before ingestion. Rex only captures anonymized behavioral anomaly metadata solely to evaluate decisions and refine model precision over time.
Like any behavioral detection engine, false positives can occasionally occur. That is exactly why the Rex Platform includes a comprehensive Case Dossier system: every action—whether autonomously resolved by Rex or escalated for human review—is documented with full evidence logs for complete visibility and swift oversight.
While Rex evaluates decisions in milliseconds, in-depth behavioral checks still require a brief analysis window. Our team recommends deploying Rex on your most mission-critical and high-impact endpoints—such as authentication (/login, /signup), payment checkouts, and high-value API transaction routes.

We building future of autonomous defense

Detect suspicious activity, automate the investigation process, and take action before your systems are exploited.

Get Started

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Rex