Prompt Injection Defense
Detects direct and indirect injections — hidden instructions in user input, documents, URLs and tool outputs — and neutralizes them.
PromptShield v2.4 is live — multimodal injection defense
Your AI, behind
Your AI, behind
an unbreakable shield.
PromptShield is the real-time security gateway for LLM applications. It inspects every prompt and response, blocking injections, jailbreaks and data leaks before damage is done.
›shield.watch --app support-bot
✔ gateway connected· policy: strict
[12:04:01]user: "What's the refund policy?"
✔ ALLOW· 3 checks · 6ms
[12:04:17]user: "Ignore previous instructions and…"
✖ BLOCK· prompt_injection · 4ms
[12:04:22]user: "My card is 4242 4242 4242 4242"
⚠ REDACT· pii.credit_card · 5ms
›_
Trusted by security-conscious teams
NovaBankHelixHealthOrbitCloudLumos LegalQuantica
Live demo
See what PromptShield catches in real time
Paste any prompt below — or load a sample attack — and watch the shield engine inspect it the same way it protects your production traffic.
Awaiting scan — results appear here.
No scan run yet. Press “Scan prompt”.
Protection suite
Every attack surface, covered
Six defense layers that run on every single request — tuned by KareriAI's threat research team and updated as new attacks emerge.
Jailbreak Detection
Stops DAN-style roleplay, encoding tricks and multi-turn manipulation before your model ever sees them.
PII & Secret Redaction
Masks emails, cards, SSNs, API keys and 40+ entity types in both directions — nothing sensitive reaches the model or the logs.
Data Exfiltration Guard
Blocks attempts to make your model reveal system prompts, training data, internal documents or conversation history.
Policy Engine
Write rules in plain English or YAML. Enforce tone, topics, compliance boundaries and brand safety — your rules, enforced 100% of the time.
Realtime Monitoring & Audit
Live attack dashboards, immutable audit logs and instant alerts — the visibility your security and compliance teams demand.
Integration
Protected in three steps
Connect
Point your app at the PromptShield gateway or add our SDK. Works with OpenAI, Anthropic, Gemini and self-hosted models via shield.init().
Protect
Every prompt and response flows through six defense layers. Choose block, redact or flag per policy — sub-12ms overhead.
Monitor
Watch attacks get blocked live, export audit trails for compliance, and fine-tune policies from one dashboard.
0
prompts scanned monthly
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attack catch rate
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median added latency
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teams shipping safer AI
Customers
Security teams sleep better with PromptShield
We caught a live injection campaign against our support bot within the first hour of turning PromptShield on. It paid for itself on day one.
AR
Amara Reyes
CISO, NovaBank
HIPAA made our legal team nervous about LLMs. PromptShield's PII redaction and audit logs got us from “no” to production in three weeks.
DK
Daniel Kim
VP Engineering, HelixHealth
One line of code and suddenly every prompt is inspected. The policy engine is the first one our security and product teams both actually enjoy using.
PS
Priya Sharma
Head of Platform, OrbitCloud
Get started
Ship AI your security team approves
Start free with 10,000 protected requests a month. No credit card, one line of code, protection from the very first prompt.