Monumental, an Amsterdam company that builds autonomous bricklaying robots, raised a $32m Series B led by Khosla Ventures, Tech.eu reported on 15 July 2026. Existing investors Plural and Hummingbird also took part. No valuation was disclosed.
Monumental said the money will fund a bigger engineering team, more robots across Europe and the UK, a wider range of construction tasks and a planned expansion into the US.
“Every robot we deploy expands the industry's capacity to build”Salar al Khafaji, co-founder and CEO, Monumental
What Monumental does
The company's electric robots use sensors, computer vision and cranes to lay bricks and mortar with millimetre precision, powered by an AI platform called Atrium. It works as an autonomous subcontractor, so contractors pay for finished walls instead of buying and operating machines.
Tech.eu reported a fleet of more than 150 robots in the Netherlands and the UK. They have worked on more than 100 homes, plus a school, a community centre, a hotel and canal walls. Nearly half of those homes were completed in the past three months. Customer names were not disclosed.
Salar al Khafaji is co-founder and chief executive, and Sebastiaan Visser is co-founder and chief technology officer. The company was founded in 2021, according to The Next Web.
Plans for growth
Monumental has appointed a dedicated UK country manager and is preparing its first US pilot projects. Funds will go towards hiring hardware and software engineers and strengthening UK operations.
Al Khafaji said every robot the company deploys expands the industry's capacity to build, a nod to the labour shortages that construction firms face.
The funding so far
The previous round was $25m in early 2024, backed by Plural and Hummingbird, The Next Web reported; it did not name that round's lead. A cumulative total was not stated. Vinod Khosla of Khosla Ventures said construction costs have exploded while the industry itself has barely changed in decades.
A busy market for construction robotics
Construction has been slow to automate, and startups are testing models that sell the work rather than the machine. Monumental's outcome-based pricing follows that approach. Its US plans will test whether bricklaying robots can fit different building methods and labour rules outside Europe.
How the robots work
SiliconANGLE described three robot systems that work together: Petra delivers bricks, Panama delivers mortar and Pisa lays the bricks. The Atrium platform coordinates them, turns high-level architect inputs into blueprints and uses photogrammetry to compare 3D replicas of a site against the plans. Monumental says this can catch millimetre-scale inconsistencies.
The company also built a programming language called Plan, calibrates sensors before each project in a dedicated facility, and uses a custom neural network to offset small brick-placement errors, according to the same report.
What investors said
Vinod Khosla said construction costs have exploded while the industry has barely changed in decades. Sten Tamkivi, a partner at Plural, called Monumental one of the most deployed autonomous construction operators in the world. Al Khafaji said the world does not have enough people to build what it needs.
Company website: monumental.co