10,000 free requests per month

#1 Firewall for AI Prompts

Protect your LLM applications from prompt injection, data leakage, and AI-specific threats - with real-time visibility and reduced LLM costs.

Prompt injection protection
PII detection & redaction
AI agent guardrails
Deploy in minutes
Get StartedBook a Demo
10K
Free requests/month
99.9%
Uptime SLA
~0.15s
Typical latency
20+
Attack vectors blocked
Live Gateway Feed

Watch PromptGuard Protect in Real-Time

Every request is scanned, validated, and logged. See the security decisions as they happen.

Total Requests
32,480
Threats Blocked
487
Cache Savings
$542.80
Bots Blocked
68
promptguard-gateway-prod-us-east-1
Live

This is a simulation of real gateway traffic. Actual events may vary.

How It Works

Three steps to production-grade AI security. No complexity, no compromises.

01

Change your base URL

Instant Setup

Update base_url and add X-API-Key header with your PromptGuard API key

02

Configure security rules

Flexible Policies

Use defaults or customize detection rules, PII redaction, and rate limits

03

Monitor everything

Full Visibility

Real-time dashboard shows threats blocked, requests analyzed, and audit logs

No SDK changes required. Works with all popular LLM providers.

Request Flow

Your App
PromptGuard
PromptGuard
LLM Provider
~0.15s typical
main.py
1
from openai import OpenAI
2
3
client = OpenAI(
4
base_url="https://api.promptguard.co/api/v1",
5
api_key=os.environ["OPENAI_API_KEY"],
6
default_headers={"X-API-Key": os.environ["PROMPTGUARD_API_KEY"]},
7
)
That's it. Requests are now protected.
Live Demo

See PromptGuardIn Action

Click an example below to see how we detect threats, redact PII, and protect your AI apps in real-time

Select an Example:

Selected Prompt

Read-only Demo

Select an example prompt from the left to see PromptGuard in action.

Click an example prompt to see PromptGuard in action

ROI CALCULATOR

See How Much You'll Save

Most companies save 40-60% on LLM costs with PromptGuard. Calculate your potential savings below.

Your Usage

Monthly Requests500K
Avg Tokens/Request1,500
Current Monthly LLM Cost
$22.5K

Your Monthly Savings

$15.8K

70% reduction in LLM costs

Savings Breakdown

Response Caching

45% cache hit rate

$10.1K

Bot Traffic Blocked

25% junk requests eliminated

$5.6K
PromptGuard Cost
-$149/mo
Net Monthly Savings$15.6K
ROI10470%
Complete Security Platform

Everything You Need toSecure AI at Scale

Enterprise-grade security features included by default. AI agent protection, red team testing - no premium tiers required.

Core

Complete AI Security

Protect against prompt injection, jailbreaks, PII leaks, data exfiltration, toxicity, and more. Seven threat types covered with ML-powered detection.

Popular

AI Agent Security

Validate tool calls before execution. Block dangerous commands, detect privilege escalation, and monitor agent behavior for anomalies in real-time.

New

Red Team Testing

Built-in adversarial testing suite. Run 20+ attack vectors against your policies with one click. Get a security grade and detailed vulnerability report.

Secure Web Scraping

Let agents browse safely. Automatically scan scraped content for indirect prompt injections and hidden malicious instructions.

Smart Caching & Routing

Semantic response caching cuts costs by up to 40%. Multi-provider routing with automatic failover and low latency overhead.

Data Leak Prevention

Automatically detect and redact PII with synthetic data replacement. Protect secrets, API keys, and sensitive information.

Enterprise

Compliance Audit Logging

Complete audit trail for compliance. Every security decision logged with full context. Export reports for audits and certifications.

Zero Retention Mode

Your data stays private. Process requests without storing content. Regional deployment options for data residency.

Start with 10,000 free requests/month

Explore all features
Industry Solutions

Security forEvery AI Use Case

From autonomous agents to customer support bots, PromptGuard provides specialized protection tailored to your specific needs.

AI Agents & Automation

Secure autonomous agents against indirect prompt injection, validate tool calls before execution, and monitor behavior for anomalies in real-time.

  • Tool call validation
  • Behavior analysis
  • Human-in-the-loop triggers

RAG & Web Scraping

Protect retrieval pipelines from poisoned documents and malicious web content with real-time content scanning.

  • Indirect injection detection
  • Document sanitization
  • URL allowlists

Customer Support Bots

Deploy chatbots that can't be jailbroken, leak customer data, or provide harmful advice. Auto-redact PII from conversations.

  • Jailbreak prevention
  • PII auto-redaction
  • Response filtering

AI Code Assistants

Prevent code injection, block malicious suggestions, and ensure AI coding tools can't access sensitive repos or execute harmful commands.

  • Code injection blocking
  • Repo access control
  • Command validation

Fintech & Banking

PCI-DSS compliant guardrails that prevent unauthorized financial advice, block fraud attempts, and protect transaction data.

  • PCI-DSS compliance
  • Fraud detection
  • Financial PII protection

Healthcare & MedTech

HIPAA-ready protection that redacts PHI, enforces medical disclaimers, and prevents AI from giving dangerous medical advice.

  • HIPAA compliance
  • PHI redaction
  • Medical disclaimer enforcement

Legal & Compliance

Ensure AI tools don't give legal advice, maintain attorney-client privilege, and create audit trails for regulatory requirements.

  • Legal disclaimer enforcement
  • Privilege protection
  • Audit trails

E-commerce & Retail

Automate returns and support while protecting customer PII, preventing refund fraud, and blocking competitor price scraping.

  • Refund fraud prevention
  • Customer data protection
  • Anti-scraping

Don't see your use case? Contact us for a custom security solution.

Verified Performance

Production-Ready Security

Real benchmarks. Measured performance. Built for scale.

~0.0s
Typical Latency
Most requests. Complex analysis may take 1-3s
0
Threat Types
Comprehensive protection coverage
Zero
False Positives
Production-tested precision
0.0%
Uptime
Built for reliability
PromptGuard

Gets Smarter Over Time

Our threat database grows daily from real attacks, making detection more accurate over time. Every attack we see improves protection for everyone.

Works with All Major Providers

Select your provider and language to see the exact code changes needed. Drop-in replacement for any OpenAI-compatible API. No vendor lock-in.

Provider:
Language:
Before
1
from openai import OpenAI
2
-3
client = OpenAI(api_key=os.environ.get("OPENAI_API_KEY"))
4
5
response = client.chat.completions.create(
6
model="gpt-5-nano",
7
messages=[{"role": "user", "content": user_prompt}]
8
)
9
10
11
AfterProtected
1
from openai import OpenAI
2
+3
client = OpenAI(
+4
api_key=os.environ.get("PROMPTGUARD_API_KEY"),
+5
base_url="https://api.promptguard.co/api/v1"
+6
)
7
8
response = client.chat.completions.create(
9
model="gpt-5-nano",
10
messages=[{"role": "user", "content": user_prompt}]
11
)

Just 4 lines changed

  • •Update base URL to point to PromptGuard
  • •Add your PromptGuard API key header
  • That's it! All your requests are now protected.

Secure Your AI ApplicationBefore Launch

Get protected in 5 minutes. Enterprise-grade AI security that works immediately - no security expertise required.

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Help Center

Frequently AskedQuestions

Everything you need to know about PromptGuard