Cyber attacks, killedin under 100MS
The team that defends your site from web attacks at the request, before they become incidents.
Argus blocks attacks in under 100 milliseconds, before they reach your app. No code changes, no new agents, one container. Start with a free Atlas scan of your domain: results in less than 5 minutes.
- ~40msTime to classify a request
- <100msEnd-to-end time-to-kill
- 1Container to deploy
- 0Code changes to your app
Attack classes Argus stops at the request
Our mission
Kysira builds software that shows you what your domain exposes, stops web attacks at the request before they become incidents, and gives your team a reason it can check for every decision.
The same attacks have topped the charts for 20 years. Most companies still find out months too late.
Injection, broken access control, cross-site scripting, server-side request forgery. OWASP has put some version of this list at the top of its Top 10 since 2003, and it still shows up in the breach reports every year. Detection mostly still means a person in a security operations center reading a dashboard. Someone has to notice before anyone can respond, and that is where the months go.
Status quo
An analyst has to see the alert, triage it, and escalate it before anyone responds.
Argus Defense
Detect, decide, and reset the TCP connection. The attacker sees their terminal die mid-payload.
The speed gap
Most organizations are still defending at human speed. Attackers have already moved to machine speed.
Fifty-four hourson one live app.
A team running Argus shared its first 54 hours. The requests were real and the figures are theirs. You act at once on the sure ones, and the gray-area requests go to a person instead of becoming false blocks.
- 720,000
- requests inspected on a live app
- 191,000
- marked as attacks, 26% of the traffic: mostly SQL injection, cross-site scripting and command injection, aimed at app settings, transaction history, recommendations and user profiles
- 60,000
- rated high-confidence: at or above the 0.95 block threshold
- 131,000
- suspicious but below that bar, so they went to a person for review instead of being blocked
Your WAF matches patterns.
We understand attacks.
Follow legitimate requests through Argus Defense and see where hostile traffic stops. Six classifiers, one verdict per request, in about 40 milliseconds.
Each hostile request is named by the classifier that caught it, then turned away at the edge.
Illustration, not live monitoring. All requests from Users, Customers, Malicious attacker pass through Argus AI first. After inspection, allowed traffic continues to the protected application. Hostile traffic bounces off Argus AI, named by the classifier that caught it: SQL Injection, Cross-Site Scripting, Command Injection, Prompt Injection, Path Traversal, SSRF.
Hostile requests bounce off Argus. Only allowed traffic reaches your application.
Find it. Track it. Defend it.
Atlas Surface Scan
See what anyone on the internet can learn about your domain, graded A to F. All it needs is the domain.
External attack surface
- Price
- Free scan
- Runs in
- Under 5 minutes
- Upgrade
- Atlas+ with Olympus
Maps your public footprint
Subdomains, dangling records, certificate and registry data, and publicly listable cloud buckets. Listability only, never contents.
Ranks what is exposed
Known CVEs ranked by CISA KEV and EPSS, exposed services, admin and VPN portals, and API docs.
Olympus DNS Lifecycle Management
Atlas+
Know every DNS record you own, and hear about the risky ones before an attacker finds them.
DNS asset inventory
- Price
- $2,000/mo or $20k/yr
- Includes
- Atlas+, 5 scans a week
- Mode
- Monitor-only
Inventories every record
Imports zone files, provider exports and authorized AXFR/IXFR, plus passive discovery.
Alerts you can act on
Flags dangling CNAMEs, takeover fingerprints, delegation problems and expiring domains, deduplicated into one triage queue.
Argus AI Defense
Scores every request to your app and blocks attacks in under 100ms, with a readable reason for each verdict.
Web application firewall
- Price
- $3,600/mo or $36k/yr
- Deploys as
- One container
- Starts in
- Shadow mode
Blocks attacks in under 100ms
SQL injection, XSS, command injection, SSRF, path traversal and prompt injection, each verdict with its reason.
Safe to roll out
Runs inside your infrastructure, starts in shadow mode, and fails open so your app stays up if Argus does not.
Ares Red Team
Attacks your cloud, Kubernetes and AI agents the way a real attacker would, keeps only what it can exploit, writes the fix, and retests.
Red team
- Price
- Talk to sales
- Status
- Early access
- Runs
- Inside your boundary
Attack paths, not misconfigs
Chains small weaknesses across IAM, network, secrets and workloads into complete routes, including through your AI agents and MCP servers.
Proof, then the fix
Every finding is re-verified before it reaches you. Ares opens the fix as a Terraform pull request, then attacks again to prove the path is closed.
The scan finds the open doors. Argus is what stands in them.
The scan is free and it ends there: you get the findings whether or not we ever speak. But knowing what is exposed is only half of the problem. Argus is the WAF that sits in front of your application and scores every request that arrives, so the doors the scan found end up guarded rather than just documented.
Start with the free Atlas scan
See what an automated attacker reaches first on your public surface. Less than 5 minutes, just your domain, nothing installed inside your perimeter.
Put Argus to Work
One container, inline. Every request scored in roughly 40 milliseconds, and anything hostile severed before your application processes it.
Protect Your Domains
Olympus watches your DNS records and flags dangling CNAMEs, takeover risks and expiring domains, so a forgotten record doesn't become someone else's way in. Monitor-only: it holds no cloud credentials and changes nothing.
Common questions
The things engineering teams ask us before they deploy. If yours is not here, the docs go deeper, or just ask us directly.
What's the false positive story?
Argus Defense ships in shadow mode by default, logging every decision and adding headers while requests still pass through. Operators run it for a week, review the would-have-killed events, then flip a single toggle to active. False positives become observable before they become incidents.
What attack classes does it cover?
Argus Defense covers the common OWASP attack classes: SQL injection, cross-site scripting, command injection, SSRF, prompt injection, credential stuffing, and more, each with a classifier built for that threat. Because those classifiers read what a request is trying to do instead of matching known strings, new variants get caught too, not only the ones already on a signature list.
Why is this different from a WAF like Cloudflare or AWS WAF?
WAFs like those are rule engines. They match patterns. Argus Defense's classifiers read the structure of an attack, so obfuscation, re-encoding, or new phrasing doesn't slip past them the way it slips past a rule. Every decision also comes with a reason you can read, which a regex can't give you.
How does the latency stay under 100ms with a model in the request path?
We use compact, purpose-built classifiers (not a general-purpose LLM), quantized and baked into the container image so there's no cold start. They run on CPU; no GPU required. The proxy and inference sidecar communicate over loopback, adding under a millisecond. Total budget end-to-end: well under 100ms on commodity hardware.
What about encrypted traffic?
Argus Defense terminates TLS at the proxy (or runs behind your existing TLS terminator like Caddy or Cloudflare). It only inspects what your application would have seen anyway. No novel decryption required.
What happens if Argus Defense goes down?
The proxy is fail-open. If the classifier is unreachable or exceeds its latency budget, the request passes through unmodified. An Argus Defense outage degrades your protection; it never takes your application offline.
See an attack die in under 100 milliseconds.
The fastest way to understand Argus Defense is to watch it work. No account, no sales call: the live monitor is open to anyone.
Check our work before you trust it with your traffic.
You should not have to take a security vendor's word for anything. Everything below is public, no sales call required.
A demo you can attack
A real Argus Defense proxy in front of a deliberately vulnerable app, open to the public. Fire your own payloads and watch the verdicts land.
- Score, verdict, and latency per request
- A readable reason for every decision
- No account required
Self-service sign-up
Create an account, invite your team, and issue a license key per proxy. No procurement gate between you and a shadow-mode deployment.
- Role-based team access
- License keys per environment or cluster
- Registry access, certificates, and ingest logs
Public documentation
Quickstart, deployment models, detection architecture, observability, and the full API reference, all readable before you sign up.
- Proxy, sidecar, and gRPC filter quickstarts
- How detection and scoring work
- API reference and metrics wiring
A named team and a real company
Kysira Corporation, registered in Delaware, with a support address a human reads.
Meet the team →A public release history
Every proxy, inference, and model release, versioned and dated.
Release notes →