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alcemy

Entrepreneur First '19

Berlin, DE · Founded 2019 · 61 employees on LinkedIn · 12 known investors

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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 · alcemy GmbH · Alcemy GmbH

Founders & leadership

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

LSLeopold Spenner
Leopold SpennerCo-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 MeyerCo-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 · 12

Also in the syndicate · 3

E.R. Capital HoldingMOMENI VenturesTobias Nendel

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 13 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
Cement plants using alcemy softwareJan 202641 plants
CO2 reduced with customersJan 202180,000 tonnes
CO2 saved during production vs predecessor (company claim)Sep 202250%
Concrete plants using alcemy softwareJan 2026160 plants
Countries coveredJan 202617
Expected CO2 emission savings from concrete-plant deploymentJan 202410-40% medium-term CO2 emission savings through efficient cement use
Maximum emissions reduction enabled (company claim)Jul 202465%
Reported savings per cement producer and plantJan 2024over EUR 500,000 in some cases
Share of German cement plants running alcemyApr 2024one third of all German cement plants; active in six further countries
Team sizeJan 20251-10 employees

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Founder mafia

2 people who came through alcemy went on to found or lead other companies.

Timeline · 7

launches, deals, and filings
Jan 2026
alcemy Foundation Partnership announced

The company announced an alcemy Foundation Partnership, accompanied by a press release on its website.

source ↗

Dec 2024
Gründerszene Award 2024, Climate Tech category

alcemy was named winner of the Gründerszene Award in the Climate Tech category, reported in December 2024.

source ↗

Jul 2024
US market entry with Titan America deployment in Florida

alcemy gained Titan America, a subsidiary of Titan Group, as a customer and began US activities by deploying its AI-powered quality control software at Titan's Medley cement plant in Florida.

source ↗

Jul 2024
alcemy raises US$10m led by Norrsken VC to enter the US market

Press coverage reported a US$10m round (also reported as EUR 9.2 million) led by Norrsken VC, with participation from Galvanize Climate Solutions, AENU and Bitstone, to fund continued R&D and entry into multiple new markets in 2024 including the USA.

$10M source ↗

Jul 2024
Low-clinker cement produced commercially with Spenner Zement

alcemy and Spenner Zement, described as Germany's fifth-largest cement manufacturer, produced a low-clinker, low-carbon cement mixture in a commercial setting.

source ↗

Jan 2024
Public innovation and digitalisation grants secured

With IL Innovationslabor GmbH, alcemy obtained public funding as a grant under German federal and state programmes for digitalisation and innovation promotion; a further funding project was in progress.

source ↗

Sep 2022
alcemy closes EUR 10m Series A led by Galvanize Climate Solutions

Berlin-based alcemy raised EUR 10 million in a Series A led by Galvanize Climate Solutions, with AENU, BitStone Capital, MOMENI Ventures, E.R. Capital Holding, Tobias Nendel, the Flixbus founders and existing investors EF, La Famiglia, Firstminute Capital and LocalGlobe. Proceeds were designated for growing the machine learning software development team, building a sales team and further expansion.

source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

▸Research sources · 13

primary sources listed

13 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 AENU, BitStone Capital, Entrepreneur First, HAWKTAIL, La Famiglia, LocalGlobe, Norrsken VC, firstminute capital and 1 more.
Where is alcemy headquartered?
alcemy is headquartered in Berlin, DE.