New BRAIN V2 and the Knowledge Vault are here.

Up to more than 5.5 billion sourced records, questions in 33 languages, 14 applications — fully local on Windows, Linux and the Raspberry Pi. Buy once, no subscription. (Shop, download page and installers are in German for now.)

Personal project · a hobby with commercial potential

A German pensioner builds an AI that runs offline on a Raspberry Pi — and holds its own against well-known models in many areas.

No data center, no million-dollar budget — just consumer hardware. The result is a modular, fully local assistant: it knows what it knows, stays silent when unsure rather than guessing, researches missing knowledge itself if you let it, learns without retraining — and backs every answer with a source.

🔒 Runs entirely on your machine — no cloud, no token costs, your data stays in-house. I don't promise anything I can't show.

The Idea

I'm retired — and instead of playing golf, I build AI. For about a year now I've been pursuing a simple idea on my own home PC setup: artificial intelligence should be honest, local and in your hands. No hype, no data leaks, no model a corporation can switch off from afar.

Language models guess brilliantly — but when they guess wrong, they sound just as confident as ever. For a poem that's fine; for an assistant that schedules appointments, checks invoices or answers questions about documents, it's a deal-breaker.

That's why my assistant has three properties I valued more than size: it is right when it's sure. It stays silent when it's unsure — “I don't know” is a valid answer, not a failure. And it researches and learns on its own when something is missing — permanently, with a source, without ever being retrained.

Why should you believe a pensioner working on something the big players are still tackling? You really shouldn't — so see for yourself: in an open comparison my AI takes on well-known models (you can replay the duels), and it even runs on a Raspberry Pi. What came out of it surprised me too.

Everything I build shares one idea: honest, local AI — that shows instead of claims.

Everything here is a private hobby project. If enough interest comes together, I'm ready to turn it into something commercial. Every euro earned here flows entirely back into expanding and further developing BRAIN.
3platforms: Windows, Linux, Raspberry Pi
100%local — your data stays in-house
€0no cloud, no token costs
14applications — from PDF to finances

BRAIN V2 in numbers

As of 2026-09-30 — counted in the shipped build 2.0.0. The body of knowledge keeps growing; new knowledge arrives via the Update Pass.

5.5 bn+sourced recordsin BRAIN Ultimate — Standard: about 1.5 bn
74subject areasfrom geography to music and film
33question languagesask in your own language
34interface languagesincl. Arabic, Hebrew, Persian
14applicationslocal, your files stay with you
29,663code exampleschecked, with source and licence
3platformsWindows, Linux, Raspberry Pi
€0running costsbuy once, no subscription

The Projects

One honest core system — and several things built on top of it or alongside it. Status marked openly.

★ The Heart

BRAIN V2

The honest AI assistant — now built on the Knowledge Vault.

Fully local, with hundreds of practical capabilities — from documents and email to research, images, audio and video. What's special isn't how much it can do, but how reliably: it doesn't guess, it cites. Modular by design — knowledge and capabilities are added as modules and are available immediately, without any retraining. New in V2: up to more than 5.5 billion checked records, questions in 33 languages, an interface in 34 languages, 14 applications including the new Skill Factory — and, if you want it, internet research that only adopts what a second source confirms. Editions: Standard €49, Pro €99, Ultimate €149 (one-time); the Community edition is free in the cloud.

▸runs 100% locally ▸knows what it knows ▸barely hallucinates ▸learns on its own ▸cites every answer ▸exact arithmetic ▸can forget (GDPR)

All prices are one-time — buy once, use forever. No subscription. (Shop & installer are in German for now.)

🔒

The Knowledge Vault

The foundation of BRAIN V2 as a product of its own: a knowledge base with more than 5.5 billion checked records that only answers when it can cite a source — fully local, and pluggable into your own programs and language models. Standard €49, Full €149.

🛡️

BRAIN EU Audit

BRAIN for regulated environments: every statement with source and date, every step traceable, personal data provably erasable — matching the transparency requirements of the EU AI Act and the GDPR.

🧩

AI Building Blocks

Assemble your own AI from modules — exactly as you need it. Knowledge and capabilities are added as modules and are available immediately, with no retraining. So you only pay for what you actually use.

core principle
🗺️

EU Audit Tool · Cartograph Suite

Generates the technical EU AI Act documentation (Annex IV/XI) for an AI model — automatically, in a single run, fully locally at the customer's site. The model weights never leave the machine.

🥊

LLM Arena

A fair head-to-head: BRAIN competes in twelve disciplines against large language models — from the 7-billion to the trillion class. Expected results are written down before each match and archived as a protocol. In the current duels BRAIN comes out ahead — with 0 hallucinations. Don't take my word for it: watch the replays.

📚

AMIGO

A searchable knowledge base for retro computing: 124 platforms and programming languages — manuals, source code and tutorials — in a full-text search across millions of passages, each with its source.

runningview →
🖥️

AmigoOS

A self-written Amiga operating system with a modern Workbench: window management like a present-day taskbar — plus a built-in ki.library that brings the AI right onto the classic Amiga.

in development
🗂️

Digital Secretary

Bundles BRAIN's office capabilities: email, appointments, invoices and documents — with a traceable rationale instead of a black box. Behind safety gates: reading automatic, sending only with approval.

in development

Support

Voluntary, with nothing expected in return — and warmly welcome.

BRAIN, the Knowledge Vault and all the other projects on this site are private hobby projects, built over many evenings and nights, on my own hardware and at my own expense — no investor, no corporation behind them.

If you like what I'm working on and would like to support the further development of BRAIN, the Knowledge Vault and the other projects, I'd be glad of a voluntary contribution of any size. It goes into computing power, storage and new, checked knowledge.

Support via PayPal

A contribution is a voluntary gift to a private project: it does not unlock any features and does not replace a purchase. I'm unable to issue tax-deductible donation receipts. Thank you for any support!

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