Dsyfer Shield

The VPN for AI

Paste into ChatGPT. Keep the secrets at home.

Shield strips names, records, prices, and credentials from every prompt before they leave the browser. The model only sees the question. You still get the full answer.

Works on ChatGPT, Claude, and Gemini. No card. 20 seconds.

Chrome · Edge · Firefox · ChatGPT · Claude · Gemini

chat.openai.com

Your prompt

Summarize the account for Dana Whitfield, account 4471-0092, contract clause 7.2(b).

3 values detected on device

Ban it, or look the other way. That is not a strategy.

68%

of knowledge workers paste company data into public LLMs weekly

Cyberhaven, 2024

11%

of that content is confidential or regulated

Cyberhaven, 2024

$14M

average cost of a GenAI data-loss incident

IBM, 2024

Existing tools say no. People switch to personal ChatGPT. You lose the data and the visibility.

Works on ChatGPT, Claude, and Gemini. No card. 20 seconds.

How it works

Strip. Send. Rebuild.

1

Strip

On-device, under 100ms. Names, account numbers, PHI, PII, credentials, and internal IDs become safe stand-ins. Originals never leave the vault.

2

Send

Only the sanitized question goes to the public model.

3

Rebuild

The answer is re-hydrated with real values on your side. Sensitive values never touched an outside system.

One pipe. Two lanes. Secrets stay home.

Works on ChatGPT, Claude, and Gemini. No card. 20 seconds.

Try it

See a real prompt get cleaned.

What you type

What the model sees

Press “Strip this” to see the sanitized version that leaves your browser.

This demo runs in the page. On the real product it runs in your browser before anything is sent, and the answer is rebuilt with the real values on your side.

Works on ChatGPT, Claude, and Gemini. No card. 20 seconds.

Built for the people already pasting.

Clinics and health orgs

PHI never rides to a public model. HIPAA BAA on Business.

Real estate and construction

Contracts, addresses, and prices stay in the vault.

Finance and insurance

Account numbers, SSNs, and holdings stripped before send.

Keep using the models your team already loves.

Start free in about twenty seconds. When you are ready for company-wide governance, audit logs, and provider contracts, the enterprise gateway is waiting.

Enterprise overview

Early access. Shield is in active development and, like any AI system, can produce inaccurate or incomplete results — review its output before you act on it. See our AI disclosures, Terms and Privacy Policy.