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Alcemy

Entrepreneur First '19

Berlin, DE · Founded 2019 · 3 known investors

alcemy.tech

alcemy provides software that uses cement producers' lab data to predict cement strength in real time and automate recipe and mill fineness decisions, aiming to reduce clinker content and cut CO2. It also tracks concrete batches from plant to construction site, monitoring consistency, water additions, and delivery performance for cement and concrete manufacturers.

Also known as Alcemy · alcemy GmbH

Advanced ManufacturingAI & Machine LearningCleantechClimate TechConstruction Tech

Founders & leadership

Alcemy was founded in 2019 by Leopold Spenner and Robert Meyer.

LSLeopold Spenner
Leopold SpennerinCo-Founder / CEOLeopold Spenner grew up around his family's fourth-generation cement business and holds an MSc in Industrial Engineering from KIT. His background includes research work at the German Cement Association and two building materials projects during his time at BCG.
RMRobert Meyer
Robert MeyerinCo-Founder and CTODr. Robert Meyer completed both an MSc and a PhD in Machine Learning at TU Berlin. He co-founded and grew the team that built FlixBus's dynamic pricing system over two years, which set prices for more than 100,000 tickets daily, and he is recognized in the Python community for open source contributions such as pypet.

Investors · 3

Company profile

researched Aug 2026

alcemy is a Berlin-based software company serving cement producers and ready-mix concrete producers. Its products apply machine learning and control engineering to plant data — chemistry, mineralogy and grain size distribution in cement plants — to forecast quality parameters such as compressive strength and to compute target values (for example cement mill fineness and recipe adjustments) that are fed back automatically into the production process. According to one profile, the system can generate reliable recommendations on target grain size and cement/concrete recipes within roughly 20-40 minutes and transmit them to the responsible staff; the cement-side method has been implemented and patented, with the concrete-side approach filed for patenting [2][6].

For ready-mix concrete, alcemy extends monitoring from the mixing plant to the construction site. It uses existing batching-plant data supplemented by IoT sensors installed on truck mixers — a digital water meter, magnetic sensor, oil pressure sensor and telemetry unit — to provide real-time forecasts of fresh concrete consistency and visibility into the state of the concrete on arrival [6]. The stated purpose of this closer quality control is to make it feasible to lower the clinker factor, including through the use of limestone powder as a widely available, low-CO2 clinker substitute in place of scarce materials such as blast furnace slag and fly ash [7]. Claimed emissions effects vary by source: up to 50 per cent savings versus conventional production [5], 50-70 per cent for concretes produced with the software [7], and up to 65 per cent emissions reduction as clinker content is reduced step by step [3].

The company markets two solutions covering the cement and concrete value chain, with website messaging around anticipating strength, reducing clinker, managing variations and maximising throughput, plus a customer-facing "Foundation Partnership" program announced as new [0][1].

Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.

Research sources · 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Alcemy do?
Berlin-based software company using machine learning to predict and control cement and concrete quality for low-clinker, CO2-reduced production.
Who founded Alcemy?
Alcemy was founded by Leopold Spenner, Robert Meyer in 2019.
Who are Alcemy's investors?
Alcemy's investors include BitStone Capital, Entrepreneur First, Galvanize Climate Solutions.
Where is Alcemy headquartered?
Alcemy is headquartered in Berlin, DE.