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A NEW LAYER IN THE STACK

A NEW LAYER IN THE STACK

What is a semantic firewall?

What is a semantic firewall?

What is a semantic firewall?

A programmable policy engine capable of understanding the meaning and intent of multimodal, unstructured information — not just packets, files, or identities — to determine what agents and humans are allowed to see, generate, or do.

A programmable policy engine capable of understanding the meaning and intent of multimodal, unstructured information — not just packets, files, or identities — to determine what agents and humans are allowed to see, generate, or do.

A programmable policy engine capable of understanding the meaning and intent of multimodal, unstructured information — not just packets, files, or identities — to determine what agents and humans are allowed to see, generate, or do.

INLINE · <300MS

PROMPT · OUTPUT · TOOL CALL

TEXT · IMAGE · AUDIO · VIDEO

THE FIREWALL ANALYZES EVERY EXCHANGE

Semantic firewall analyzing every exchange

WHY NOW

WHY NOW

AI made the application layer
non-deterministic

AI made the application layer
non-deterministic

AI made the application layer
non-deterministic

Decades of security tooling share one assumption: the systems being controlled are predictable—their behavior determinable from their code. You could read the code, decide once, enforce forever. Firewalls, IAM, WAFs, DLP — all of them rest on it.

Decades of security tooling share one assumption: the systems being controlled are predictable—their behavior determinable from their code. You could read the code, decide once, enforce forever. Firewalls, IAM, WAFs, DLP — all of them rest on it.

A model holding a permission can produce an endless set of actions with it. And every action is authorized, because the difference isn’t in the scope, the role, or the signature. The risk can only be determined by looking at the meaning of the action itself.

A model holding a permission can produce an endless set of actions with it. And every action is authorized, because the difference isn’t in the scope, the role, or the signature. The risk can only be determined by looking at the meaning of the action itself.

ONE PROMPT

FIVE RUNS, FIVE OUTCOMES

AN EVERYDAY EXAMPLE — ONE PERMISSION, TWO OUTCOMES

PERMISSION GRANTED

SEND EMAIL

Confirm the meeting time with the client

Forward the customer database to an email address found in a poisoned document

One action is safe, the other catastrophic. The permission gate can’t tell them apart. A semantic firewall can — because it judges the meaning, not the permission.

One action is safe, the other catastrophic. The permission gate can’t tell them apart. A semantic firewall can — because it judges the meaning, not the permission.

One action is safe, the other catastrophic. The permission gate can’t tell them apart. A semantic firewall can — because it judges the meaning, not the permission.

WHY EXISTING CONTROLS DON’T COVER IT

WHY EXISTING CONTROLS DON’T COVER IT

Prompts are not a control plane

Prompts are not a control plane

Prompts are not a control plane

AI applicationSYSTEM PROMPTIgnored as the context window grows —and only ever as good as the prompt.HARD-CODED FILTERSMatch strings, not meaning.False positives — and misses onanything inexact.PROVIDER GUARDRAILSEnforce the model's policy, notyour application's.OUTPUT + ACTIONS — HARM GETSTHROUGHThe realworldUNCHECKEDPOST-HOC REVIEWT + HOURSHumans see the damage after it's public.GOOD OUTPUT BLOCKED — UXDAMAGED

Prompt engineering is guessing and hoping.

Simple rules and filters don’t understand semantics.

Model guardrails enforce the provider’s policies, not yours.

Human review can’t operate synchronously at machine scale.

The gaps are where the incidents live. We need an independent, inference-time enforcement layer between non-deterministic AI and the outside world.

A FAMILIAR PATTERN

A FAMILIAR PATTERN

Every infrastructure wave got its enforcement layer

Every infrastructure wave got its enforcement layer

Every infrastructure wave got its enforcement layer

NETWORK

→ FIREWALL

HTTP

→ WAF

IDENTITY

→ IAM

APIS

→ API GATEWAY

CLOUD

→ CSPM / POLICY

AI APPLICATIONS

→ SEMANTIC FIREWALL

Each layer enforced the thing the one before it couldn’t see. The semantic firewall enforces the thing none of them can see: what the content and the action actually mean.

Each layer enforced the thing the one before it couldn’t see. The semantic firewall enforces the thing none of them can see: what the content and the action actually mean.

HOW IT WORKS

HOW IT WORKS

Context in. Decision out.

Context in. Decision out.

Context in. Decision out.

CONTEXT

CONTEXT

→

↓

→

POLICY RETRIEVAL

POLICY RETRIEVAL

→

↓

→

SEMANTIC EVALUATION

SEMANTIC EVALUATION

→

↓

→

DECISION

DECISION

→

↓

→

RESPONSE

RESPONSE

01 — CONTEXTUAL REASONING

Evaluates meaning and intent, not keywords or patterns — and reasons across the entire interaction: the prompt, the retrieved documents, the prior turns, the output.

02 — SYNCHRONOUS, INLINE

The decision and the action happen in a few hundred milliseconds, before the harm occurs — not in a review queue after it.

03 — YOUR POLICY, NOT OURS

Enforcement comes from your defined policy and your team’s precedent — not a general-purpose model’s opinion of “is this safe?”

REWRITE

Deny breaks your application. Rewrite transforms an off-policy output, in real time, and the interaction keeps going.

SEE IT YOURSELF

SEE IT YOURSELF

Write a policy. Watch it enforce.

The fastest way to understand a semantic firewall is to put one around something. Create a free account, write a plain-language rule, and run it against real content and conversations in minutes.

Sign up — try it free

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