Unlock data where it lies.

Make it useful for AI.

Hardshell makes your most valuable data safe to use in your AI platforms.

What Hardshell is

Hardshell is an AI data security platform. It connects enterprise data to ChatGPT, Claude, Microsoft 365 Copilot, Gemini and internal assistants without migrating it, enforces each user's existing permissions at query time, substitutes stand-ins for real identifiers before content reaches a third-party model, and records every retrieval under opaque IDs. It tests what an AI system can leak before rollout and maps each finding to MITRE ATLAS technique IDs. It deploys as a cloud service, in a private cloud, or as an offline bundle.

That is data sovereignty in practice. Sensitive data stays inside your boundary and under your jurisdiction while your teams use frontier models, and the data silos you already have can be connected to an AI knowledge base without collapsing into one open corpus.

How it Works - Model Training and Fine-Tuning

Where does your enterprise AI leak data?

Models memorize sensitive content from training data, and AI knowledge bases surface documents users were never cleared to see. Pick an attack scenario to watch each pathway leak, and see what changes when Hardshell sits between your data and the model.

How it Works - AI Knowledge Bases

Frontier models, without handing over your data.

Sensitive, confidential and regulated information is never shared with the model provider. Your team works in the tools they already use, and gets real answers back.

Hardshell connects your existing systems and inherits their permissions. When someone asks a question in ChatGPT, the connector returns only what that person is cleared to see, and every sensitive value is replaced with a stand-in before anything crosses to the model provider. The model reasons on stand-ins and never holds a real identifier. The real values are restored in your team’s own window afterwards. Every retrieval is recorded.

What your team sees

ChatGPT

Where should we begin?

Which East-region account is our largest Q3 collections exposure, and who owns it?
Searched secure data backend ✓

Marcus T. Whitmore is the largest East-region exposure in the Q3 aging: $184,220.00 open, 62 days past due. Account owner is Dana Okafor.

Restored by Hardshell. The model produced CUST-A4417 and never held a real name.

Ask anything Secure enterprise data backend connected

Your environment · Hardshell

HardshellConnected

Recording 0 spans

Your data never leaves your systems.

What ChatGPT receives

Nothing sent yet. CUST-A4417 OWNER-2210 $184,220.00 62 days past due

0real identifiers

Connect your systems once. Your data stays where it is, and keeps the permissions it already has.