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For people who take privacy seriously

Your Data. Your Key.
Your Control.

Even we cannot read your data. Not because we promise it – because mathematics proves it. Use ChatGPT, Claude & Co. without giving up your privacy.

Start for Free How It Works

Free forever • 50 requests/month • No credit card

Why Your Data Is at Risk

Every time you use an AI, you reveal more than you think.

Your Chat with ChatGPT

Every message is stored on US servers and may be used for training. Your thoughts become training data.

Your Personal Data

Name, email, address – everything ends up unencrypted at OpenAI, Google & Co. You have no control over it.

No Going Back

Once sent, always stored. You lose control over your data – irreversibly.

How KI-Shield Protects You

Three steps – fully automatic, invisible, secure.

Step 1

You Write Normally

KI-Shield sits between you and the AI. You notice no difference – but your data is protected.

KIShieldGuard
Step 2

Your Data Gets Protected

Names, emails, addresses – everything is automatically replaced with placeholders before it reaches the AI.

Step 3

You Get the Answer

Placeholders are translated back. Nothing changes for you – except that your data is safe.

Before / After

Without KI-Shield

„My name is John Smith, I live in Munich and my email is john@email.com. Write me a cover letter.“

All your data ends up at OpenAI

With KI-Shield

„My name is [PERSON_1], I live in [CITY_1] and my email is [EMAIL_1]. Write me a cover letter.“

OpenAI only sees placeholders – you get the full answer

Even We Cannot Read Anything

No trust required. No promises. Only mathematics.

zero-knowledge.sh
# Key derivation
Password + Salt → Argon2id → 256-bit Key
# What the database stores
chat_title: aGVsbG8gd29ybGQ=...x7k2mP
message: U2FsdGVkX1+vuppp...9fQz3w
audit_log: eyJhbGciOiJBMjU2...mK8xRs
# Who can read it?
operator: ✘ NO
only_you: ✔ YES

Your Password = Your Key

Your password is derived into a 256-bit key via Argon2id that only exists in RAM – never in a database.

No Access by the Operator

We built the server so that we ourselves cannot access your data. This is not a promise – it is architecture.

In Case of a Data Breach: Worthless Ciphertext

Even if someone steals the database – without your password, it is just random strings. AES-256 makes them useless.

What You Can Rely On

German Servers

Hetzner, Nuremberg

AES-256

Encryption

Post-Quantum

Signatures

Open-Source Friendly

BYOK

GDPR & AI Act

Compliant

Privacy Should Not Be a Luxury

Start for free – scale when you are ready.

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From EUR 0 • No credit card required • Get started instantly

Frequently Asked Questions

Your personal data (names, emails, addresses) is automatically replaced with placeholders before being sent to the AI. The original data stays on German servers and is encrypted with AES-256 – only you can decrypt it.

No. KI-Shield uses a zero-knowledge architecture. Your password generates a 256-bit key via Argon2id that only exists in RAM – never in the database. Even in the event of a database breach, all data is worthless ciphertext.

Yes. KI-Shield works on the BYOK principle (Bring Your Own Key). You use your own API key for OpenAI, Anthropic, Google, or other providers. This way you keep full control over your AI costs – and there are no hidden fees.

Yes. The Free plan is permanently free with 50 requests per month. No credit card, no subscription, no catch. See more plans on our pricing page.

Zero Knowledge means that even the operator of KI-Shield cannot read your data. Your password is derived into a 256-bit encryption key using Argon2id, which only exists in volatile memory. All chat messages are AES-256 encrypted. Not because we promise it – because mathematics proves it.

Ready to Take Back Control?

Your data belongs to you. Not OpenAI, not Google, not us. Take back control – now.

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