# Patronus Protect

> Patronus Protect is an on-device AI firewall and AI security platform by Casdo Labs GmbH, registered with the Local Court of Munich under HRB 315964 and developed in Regensburg, Germany. It detects, monitors and controls AI usage directly on the endpoint (prompts, responses, agents, tool calls and MCP traffic) without routing any data through a cloud. GDPR-compliant by architecture, offline-capable, provider-agnostic.

Key facts:
- Detects AI traffic across all apps, browsers and providers (ChatGPT, Claude, Gemini, Copilot, local models) at the network layer, in under 10 ms, on-device
- Enforces policies locally: block, redact PII/secrets, control AI agent actions, full audit trail
- Open-source components: Patronus Ark security library (Rust/Python, GPL-3.0) and the Wolf Defender prompt-injection model family on Hugging Face
- Supports EU AI Act compliance: AI inventory (Art. 4), logging (Art. 12/26), technical safeguards (Art. 15)

## Product
- [AI Firewall](https://patronus.studio/product/ai-firewall): The on-device AI firewall: architecture, comparison with cloud AI security, policy enforcement
- [AI Detection](https://patronus.studio/product/ai-detection): Provider-agnostic AI traffic detection SDK using pre-TLS signals and behavioral fingerprints
- [AI Models](https://patronus.studio/product/ai-models): Purpose-built European security models (heuristics, LightGBM, compact transformers)
- [Security Library](https://patronus.studio/product/security-lib): Patronus Ark, an open-source local security gateway for prompt injection, DLP, PII

## Solutions
- [Shadow AI Discovery](https://patronus.studio/solutions/shadow-ai-discovery): Find every AI tool employees actually use
- [AI Agent Security](https://patronus.studio/solutions/ai-agent-security): Monitor and control autonomous agents and MCP servers
- [EU AI Act Compliance](https://patronus.studio/solutions/eu-ai-act-compliance): Operationalize the AI Act's technical obligations
- [AI Data Loss Prevention](https://patronus.studio/solutions/ai-data-loss-prevention): Stop sensitive data before it reaches an AI model

## Resources
- [EU AI Act Assessment](https://patronus.studio/eu-ai-act/cybersecurity-assessment): Free 23-question self-assessment with personalized PDF report
- [Blog](https://patronus.studio/blog): Technical research on AI security, shadow AI, MCP attack surface, agentic AI
- [Download](https://patronus.studio/download): Patronus Protect for macOS and Windows
- [Documentation](https://docs.patronus.studio/): Setup, permissions and deployment guidance

## Contact
- Email: team@patronus.studio
- German version: https://patronus.studio/de