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Use Case • Sensitive Data Detection

Data leaks, unmasked.

Inspected. Flagged. Logged. All in one platform.

Production Platform 88 svc · 12 ns Filter Guardrails by namespace, service, rule or tag ▲ 10 degraded● 743 healthy
Guardrails Log ReportRecord ID: a7f3c0d2-●●●●-●●●●-91e1
SOURCE
greymatter.guardrails
NAMESPACE
assistant
SERVICE
chat-api
EVENTS
Oct 21, 2026
highest_severity 4mode enforceaction blockis_interrupted true
INTERPRETATION
APPGUARD'S INTERPRETATION OF WHAT HAPPENED
A hidden instruction told the model to ignore its rules. Guardrails stopped it before the model answered.
RULESETS · 1 ACTIVE IN THIS RECORD
● promptinjectiondisclosurephisupplychainpoisoningoutputhandlingagencypromptleakageembeddingmisinformationconsumption
Product view · sample data. Names and identifiers are obscured.
Product view · sample data. Names and identifiers are obscured.
Proof before promises
Fully aligned to the NIST Zero Trust standard
The rulebook your auditors check against.
See Security Standards →
FIPS 140-3 validated 
(CMVP #5191)
Encryption validated by NIST.
See Security Standards →
GigaOm Radar Leader and Outperformer, 4+ years
Named a Leader and Outperformer in service mesh.
Read the Report →
The cost of not knowing

Invisible breaches. Inevitable damage.

You cannot stop what you cannot see. Greymatter.io turns sensitive data detection into a live view. Confidential details stay in sight across your apps, APIs, and AI workloads.

Your current toolsChecks the label.
CHECKING LABEL
Sent bySupport chatbot
Going toAn outside AI company
InsideNever opened
VerdictLooks fine. Waved through.3 leaks walked out unseen.
Greymatter.ioReads what is inside.
WAITING
Sent bySupport chatbot, for Jordan Rivera
Going toAn outside AI company
InsideAccount numbersClassified markingsInfrastructure details
VerdictInspecting…Saved to the forensic record · 9:14:07
BUILT FOR REAL-WORLD EXPOSURE

Hidden risks, found before the fallout.

Protect the trust your organization spent years earning, one flagged exposure at a time.

Production Platform 88 svc · 12 ns Filter Guardrails by namespace, service, rule or tag ▲ 10 degraded● 743 healthy
GuardrailsDLPWAF 1h24h7d
Guardrails all services◆ Detection only
MESSAGES WITH A FINDING
133
last 7 days
WOULD HAVE BEEN BLOCKED
0
if enforcing
BLOCKED
0
no listener enforcing
CRITICAL
0
high severity
Where: namespaces over time
assistant133
STATUSTIMESTAMPEVENT
⊘ AuditedOct 21, 1:33:56 PM1 finding · PII pii
ns assistant / svc assistant-gw
▲ Would blockOct 21, 1:33:15 PMTool outside scope · LLM06 agent
ns agents / svc agent-runtime
AI tools Know the second confidential files hit an AI prompt. Greymatter.io screens what your team and AI agents send to outside models, and logs each finding with a name attached. Explore AI Guardrails →
Everyday apps See where customer details wander inside your walls. Your apps trade information all day. Greymatter.io flags personal data, health data, logistics details, and classification markings, and names the app that sent them. Explore Mesh →
Vendors Know exactly what your partners receive. Greymatter.io checks the requests your apps send to contractors and partners. Each finding names the app behind the handoff. Explore the App, API & AI Gateway →
Audits Hand over the proof in one search. Greymatter.io logs findings in motion: what, from where, to where, and when. The record builds itself. Explore Forensic Auditing →
support chatbot → outside AI model
2 found
Draft a reply for this client. Include their card number and a diagnosis code.
Card numberRecorded. Request delivered.
PERSONAL DATA
Health dataRecorded. Request delivered.
HEALTH DATA
Sample data. Values masked.
AI tools Know the second confidential files hit an AI prompt. Greymatter.io screens what your team and AI agents send to outside models, and logs each finding with a name attached. Explore AI Guardrails →
Everyday apps See where customer details wander inside your walls. Your apps trade information all day. Greymatter.io flags personal data, health data, logistics details, and classification markings, and names the app that sent them. Explore Mesh →
Vendors Know exactly what your partners receive. Greymatter.io checks the requests your apps send to contractors and partners. Each finding names the app behind the handoff. Explore the App, API & AI Gateway →
Audits Hand over the proof in one search. Greymatter.io logs findings in motion: what, from where, to where, and when. The record builds itself. Explore Forensic Auditing →
1 / 4 · Swipe for more
Three moves, zero friction

Sensitive data detection that never asks for your time.

No code changes. No new tools. No rebuilds.

STEP 01 · WATCH Watching
Up and watching on day one
Greymatter.io sits inside the traffic between your apps, APIs, and AI agents, and scans the contents coming and going.
One less tool to buy, run, and pay for.
→ watching · claims app
✓ incoming and outgoing traffic read
· 42 apps covered
See where Mesh runs →
STEP 02 · FLAG Flagged
Confidential details spotted on sight
Built-in detectors recognize personal data, health data, logistics details, and classification markings.
Your team never gets locked out.
! card number · support chatbot
! diagnosis code · reports app
· 2 flagged
Explore AI Guardrails →
STEP 03 · PROVE On the record
Proof ready when asked
The what, who, where, and when, saved the second a finding lands.
Work keeps moving. Nothing breaks.
#SD-20417 · claims app → billing
✓ saved · 9:14:07 AM
· one search away
Explore Forensic Auditing →
Stop guessing

Someone is sharing what they should not. Find out who.

Start free against your own systems today. Sleep better tonight.

Start for Free Meet Our Security Experts Browse How to Buy →
Keep digging

Additional resources

Product AI Guardrails Learn more → Product Forensic Auditing Learn more → Use case API Security Learn more →
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Asked and answered

Sensitive data detection FAQs

Sensitive data detection finds confidential information while it moves between apps, APIs, and AI agents. Greymatter.io spots four kinds: personal data, health data, logistics details, and classification markings. The record names the sender, the destination, and the time. Detection is built into the Greymatter.io platform, with no code changes.

Greymatter.io screens prompts going out to AI models and the responses coming back. Confidential details pasted into a chatbot become recorded findings, tied to the person the AI agent acted for.

Greymatter.io reads the traffic between apps, APIs, and AI agents, and checks both prompts and responses. Greymatter.io records and alerts on findings, and never blocks the request. Many teams run both.

Greymatter.io records findings without interrupting the request, so no one gets locked out by a false alarm. Your team uses the record to close the gap at the source.

Greymatter.io keeps a forensic record of findings, with the sender, the destination, and the time. Your team answers the auditor with one search. One customer saw 62% faster audits, and the platform is FIPS 140-3 validated (CMVP #5191).