About us
About us
We are weyer data engineering gmbh from Düren, Germany, part of the weyer gruppe. We develop AITEZA, an AI platform for working with company documents. It grew out of a practical problem: at the weyer gruppe, knowledge sits in thousands of documents, spread across projects, customers and years.
Our story
Why we built AITEZA
At the weyer gruppe, engineers work every day with permit documents, expert reports, plans and standards. The answer to a question almost always existed somewhere, but finding it took time. General AI assistants did not help: they did not know which project to search, and they could not show where their statements came from. We wanted a tool where we decide where the AI searches, and where every answer has a source. Since nothing like that existed, we built it.
Today
AITEZA is used by more than 500 people, as SaaS from data centres in Frankfurt am Main or on our customers' own infrastructure. Development still happens in Düren, close to the teams who use it every day.
Our journey
2023
The first idea
The management of the weyer gruppe comes up with the idea of making the knowledge in projects and documents usable with AI.
Mid 2024
First prototype
A first prototype answers questions about real project documents, with sources.
October 2024
weyer data engineering gmbh is founded
To develop AITEZA, we found a dedicated company in Düren within the weyer gruppe.
January 2025
Launch at the weyer gruppe
AITEZA goes into daily use at the weyer gruppe.
September 2025
Sources open at the right place
Citations open the document directly at the quoted passage, and search in datarooms becomes much more precise.
January 2026
One chat for everything
Several datarooms can be connected in one chat and switched at any time. Web search is added.
February 2026
Agentic search
AITEZA searches datarooms in several steps on its own, reads whole sections and does the maths.
April 2026
Images and drawings
Plans, drawings and photos are analysed visually and become searchable in the dataroom.
June 2026
Workflows and Office files
Create Word, Excel and PowerPoint files directly in the chat, check documents against fixed criteria, version history for every file.
September 2026
Prompt library
Save, organise and share prompts with colleagues.
October 2026
Automatic model selection and integrations
AITEZA picks a suitable model for every message, connects to Microsoft 365, Google Workspace, Jira and other systems, and shows AI costs in euros.
October 2026
Relay
Datarooms can be shared with customers and partners who do not need an account. Guests ask questions and see what has changed since their last visit.
What we stand for
Cost transparency
When we started with AI at the weyer gruppe, we did not know what costs to expect. Licences, tokens, servers, setup: much of it was unclear or hidden. That is why AITEZA shows AI costs in euros at any time, per person, group and model, and why our prices are published on our website.
Sources, not claims
Every statement in an answer is linked to the passage in the original document. Anyone who passes an answer on does not have to trust it blindly but can check it with one click.
Data stays in Europe
Hosting in Frankfurt am Main, AI models in EU regions, and on request entirely on your own infrastructure. Documents and questions are not used to train AI models.
Close to practice
We use AITEZA ourselves every day. New features come from real projects.
The team
The people who develop, test and secure AITEZA and introduce it together with our customers.
Peter Prumbach
Operations and Infrastructure
Peter is responsible for running AITEZA end to end: the software, the servers and the on-premise installations at our customers' sites.
Michael Ansorge
Customer Success and Training
Michael supports customers from the first demo to daily use, trains teams and brings their feedback into development.
Cihangir Günbay
Cyber Security, Certification and Audits
Cihangir is responsible for AITEZA's information security and supports certifications and audits.
LinkedInSascha Schoenen
Software Testing and Quality Assurance
Sascha tests every new version before it goes live and makes sure new features work reliably in everyday use.
David Lügger
Marketing Coordinator
David looks after AITEZA's social media channels and this website.
Walter Rodriguez
Marketing Coordinator
Walter organises events and trade fair appearances and is the contact for press enquiries.
Philip Weyer
Managing Director
Philip founded AITEZA and develops it. He is responsible for product and technology.
Get to know us
In a short demo we show you AITEZA with examples from your industry and answer your questions about data protection, costs and rollout.
