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Monumental
AI-powered autonomous robots for on-site construction bricklaying
About Monumental
Monumental is a robotics company aiming to address labor shortages, rising costs, and sustainability issues within the construction industry. Founded in Amsterdam in 2021 by CEO Salar al Khafaji and CTO Sebastiaan Visser, the company develops AI-powered autonomous robots that perform on-site construction tasks, with an initial focus on bricklaying. The founders are serial entrepreneurs, having previously co-founded the data visualization firm Silk, which was acquired by Palantir in 2016.
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The company's core product consists of small, electric, and agile autonomous ground vehicles (AGVs). These robots are designed to navigate the rough terrain of construction sites and work alongside human counterparts. Equipped with advanced sensors, computer vision, and small cranes, the robots can place bricks and mortar with a precision and efficiency comparable to human bricklayers. The entire system is operated by Monumental's proprietary AI-powered software, Atrium. The robots are compact enough to access tight spaces, move through doorways, and be transported in a van.
Monumental operates on a bricklaying-as-a-service business model, where contractors hire the company as a subcontractor. This approach allows construction companies to utilize the technology without the financial risk of purchasing and maintaining the machinery or the technical burden of learning to operate it. The company has already deployed its robots on several projects in the Netherlands, including social housing and the completion of a 15-meter facade for an office and warehouse building in 2023. In February 2024, Monumental announced it had raised $25 million in a funding round co-led by Plural and Hummingbird, with participation from investors like Northzone and Foundamental. This capital is intended to scale its team, increase the number of robots deployed across Europe, and expand the range of tasks the robots can perform.
At a glance
- Status
- Operational
- Founded
- 2021
- Headquarters
- Amsterdam, Netherlands
- Employees
- 102
- Open positions
- 14
- Dealroom signal
- 93.3/100
- Industry
- Real Estate
- Sub-industry
- Construction
- Sector
- Robotics, Core AI, Industrial Robotics, Construction Robots, Urban Tech, Construction Automation
- Technology
- Artificial Intelligence, Hardware, Deep Tech, Computer Vision, Autonomous & Sensor Tech
- Business model
- Manufacturing
- Client focus
- b2b
Knowledge graph
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Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES BOther financing | Jul 2026 | $32M | $128M | Plural · Hummingbird Ventures · Khosla Ventures | ↗ |
| EARLY VCOther financing | Feb 2024 | $25M | $100M | Northzone · Hummingbird Ventures · Foundamental · NP-Hard Ventures | ↗ |
Growth signals
Latest recorded traffic for Monumental is 32K monthly website visits, up 128.6% over the last three months. Monumental's team grew 25.9% over the past year.
Open positions
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Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Series A6 investors entered at this stage
Hummingbird Ventures
Plural
Northzone
Foundamental
NP-Hard Ventures
Khosla Ventures
Other known investors3 additional known investors
Cur8 Capital
Material Ventures- SGStef van Grieken
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Monumental on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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