We combine deep industry expertise with experience in building one of the most effective machine learning systems in Europe.


What drives us

Thanks to alcemy, our customers should become quality leaders compared to their competitors. Manual processes in the plants and fluctuations in quality characteristics must be a thing of the past. With regard to the climate crisis, we firmly believe that we can only actively counteract it if we manage to reduce the carbon footprint of the cement and concrete industry significantly and quickly.

What we do

Traditional concrete formulations have a large proportion of cement clinker, the main ingredient and binder in concrete. This means that errors in the production process or fluctuations in humidity due to natural resources such as sand do not have such a strong impact. The downside of the coin, however, is an unnecessarily high CO2 footprint, which is largely caused by the cement clinker manufacturing process. In order to reduce CO2 emissions, this cement clinker must be replaced by low-CO2 substitutes such as limestone powder, calcined clays and recycled fines. However, the result is an even more sensitive product, which can hardly be handled with today’s manual processes and which will significantly increase production costs due to additional personnel expenditure.

This is exactly where alcemy comes in: With our software, 5 million tons of cement have already been controlled and over 80,000 tons of CO2 have already been saved. In addition, two of our customers will add a significantly lower CO2 CEM X to their product portfolio in 2023 with our support. For us, these successes are just the beginning. We want to transform the industry sustainably.

This is us

How we came to alcemy

alcemy was founded in 2018 with the conviction that in cement and concrete production, the reduction of CO2 can and must go hand in hand with the reduction of production costs. Despite or precisely because of their different professional backgrounds, Leo and Robert were united from the start by striving to have a positive impact on the environment with their work.

Leopold Spenner grew up with the material as a child and spent every summer in his family’s cement works. He became aware of the challenge of decarbonizing this industry early on.

Robert Meyer brings the technical know-how in the field of data science and machine learning and helped build the ML team at Flixbus.

Advisory Boards and Advisors

dr Martin Schneider

General manager of the Association of German Cement Works eV and head of the research institute.


Prof. Dr.-Ing. Michael Haist

Professor at the Institute for Building Materials at the Leibniz University in Hanover.

Dipl.-Ing. Eckhard Bohlmann

Former Head of Research and Innovation at Heidelbergcement.



Discover our products.

Book a demo and make an appointment. We look forward to meet you.

Leopold Spenner

Co-Founder & CEO


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