Secure AI Prompts Before They Leave Your Device
On-device prompt analysis for iOS and macOS. ML-powered detection of injection attacks, jailbreaks, PII exposure, and secrets — before prompts leave your device.
Free tier available. No account required. ML model included — no separate download needed.
Why PromptGuard?
Every time you paste information into ChatGPT, Claude, or any AI assistant, you're making a split-second decision about what's safe to share—and most people get it wrong. PromptGuard puts a security expert in your pocket, analyzing your prompts locally on your device before they ever leave your device. It catches the email addresses you forgot to remove, the API keys hidden in that code snippet, and the subtle prompt injection and jailbreak patterns that a neural ML classifier catches but simple rules would miss. For professionals who rely on AI daily but handle sensitive information—developers, lawyers, healthcare workers, executives—PromptGuard is the safety net that lets you work faster without the constant anxiety of wondering what you just accidentally exposed.
Security features for every prompt
PromptGuard analyzes your prompts locally before they leave your device, protecting you from security risks and helping you understand API costs.
Security Detection
ML-powered detection of injection attacks, jailbreaks, PII exposure, and secrets — all analyzed on-device using Meta's Prompt Guard neural classifier.
Local-First Privacy
The ML model is bundled with the app — no download required. All analysis runs on-device from the moment you launch. Your prompts are never sent to external servers.
Multi-Provider Support
Works with OpenAI, Anthropic, Ollama, and LM Studio. Secure prompts for any AI provider you use.
Guided Generation
Step-by-step secure prompt building with 50+ templates. Create effective prompts that follow security best practices.
Cost Estimation
Know your API costs before execution. See token counts and estimated spend for any prompt.
PDF & CSV Export
Export your prompt history to PDF or CSV for compliance reporting and audit trails.
App Lock
Protect your prompts with Face ID or Touch ID. Biometric security keeps your AI conversations private.
Share Extension
Analyze prompts from any app via the iOS Share Sheet. Quickly check text for security issues without leaving your current app.
Home Screen Widgets
Security status at a glance with home screen widgets. Monitor your prompt safety score and recent analysis results.
iCloud Sync
Sync prompt history across devices with iCloud. Your analysis history follows you seamlessly between iPhone, iPad, and Mac.
macOS App
Native macOS app with full feature parity. Analyze prompts on your Mac with the same powerful security engine.
Margah Gateway Integration
Connect to Margah Gateway for enterprise-grade analysis, custom detection rules synced to every device, and a centralized audit trail of all prompt activity.
On-device ML detection powered by Meta Llama Prompt Guard 2 22M via CoreML
Simple, transparent pricing
Start free with essential security features. Upgrade to Pro or Family plans for advanced capabilities, guided prompt generation, and iCloud sync. Save 33% with annual billing.
Free
Get started with essential prompt security
- ML-powered security analysis
- 1 local server (Ollama / LM Studio)
- 30-day prompt history
- Neural injection & jailbreak detection
Pro Monthly
Advanced features for power users
- Guided prompt generation with 50+ templates
- Cloud provider support (OpenAI, Anthropic)
- Unlimited local servers (Ollama / LM Studio)
- Margah Gateway with custom rule sync
- iCloud sync & PDF/CSV export
- App lock (Face ID / Touch ID)
Pro Annual
Save 33% — includes 7-day free trial
- Everything in Pro Monthly
- 7-day free trial included
- Save over $40/year vs monthly
Family Monthly
Share Pro with your household
- Everything in Pro
- Share with up to 5 family members
- Family sharing via Apple
- Separate prompt histories
Family Annual
Save 33% — includes 7-day free trial
- Everything in Family Monthly
- 7-day free trial included
- Save over $60/year vs monthly
Stop Hoping Your Prompts Are Safe.
Start Knowing.
Download PromptGuard and analyze your AI prompts for security risks before they leave your device.
