AI Services

Put AI to work on confidential data without handing that data over. We build AI tools that keep sensitive information on your side.

Confy AI: private AI for Excel

Ask an AI to analyze or edit a spreadsheet while the values in the columns you mark private never reach it. The AI works on synthetic stand-ins and writes code; that code then runs on your real values, inside your browser. Free to install, with your own AI provider account.

Get Confy AI from Microsoft Marketplace

Or install it right in Excel, on the web or desktop: Home › Add-ins › More Add-ins, search “Confy AI”.

How your data flows

You choose
what stays private

PRIVATE

Mark any column as private: names, salaries, IBANs, medical notes, wallet addresses. The marks are stored in the workbook and move with the columns when you insert, delete or rearrange them.

Synthetic
stand-ins

SYNTHETIC

Before anything is sent, every private cell is replaced with a realistic value of the same type and range. The AI sees data that behaves like yours but belongs to no one.

Exact answers,
computed locally

LOCAL

The AI writes code against the synthetic copy. Confy then runs that code on your real values in your browser, so the answer is exact and the model never sees it.

Sealed sandbox

SANDBOX

AI-written code runs in an isolated sandbox with all network access blocked. Confy checks that block every time it starts and refuses to run at all if the check fails.

Your provider,
your key

BYOK

Works with OpenAI, Anthropic, Google Gemini, OpenRouter or any OpenAI-compatible endpoint, including a model you host yourself. Requests go straight from your browser to that provider, with no ABDK server in between.

Changes written
into Excel

EDIT

Ask for a new column, a cleanup, a summary or a chart, and Confy writes it straight into your workbook, formulas included. Any column it adds waits for you to decide whether it is private.

WHY CHOOSE ABDK
FOR PRIVATE AI

In security audit and consulting since 2016, with deep backgrounds in cryptography and security research

Privacy claim tested end to end: we plant canary values in a workbook and scan every outgoing request for them

No account and no ABDK server: your data goes only to the AI provider you choose

Published limits: we state exactly what reaches the AI and what never does

Available on

Microsoft Marketplace for Excel

Beyond the add-in

The idea behind Confy AI works anywhere a model has to act on data it must not see. We can bring it to your own systems.

Discuss your project

Private AI for
your systems

CONSULTING

We apply the same approach to your databases, internal tools and data pipelines. The model sees the schema and synthetic rows; its code runs on your real data, inside your infrastructure.