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Monumental

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AI-powered autonomous robots for on-site construction bricklaying

Amsterdam, NetherlandsFounded 2021Robotics
Valuation $100–250M Last recorded · 2026
Headcount 100–500 Current team size
Total funding $50–100M Disclosed equity funding
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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.

Source: Dealroom company data

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

Funding history

2 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
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 ↗
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Growth signals

Monumental website traffic

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.

Latest monthly visits32K 3-month web change+128.6% 1-year team growth+25.9%
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Similar companies

Closest operating peers by Dealroom taxonomy

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Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

Investors

9 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Series A6 investors entered at this stage

Other known investors3 additional known investors

  • Cur8 Capital
  • Material Ventures
  • Stef van Grieken
Team profiled 13 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 2 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
7 countries with
team presence
🇳🇱 Netherlands89.3%
🇪🇸 Spain2.7%
🇳🇬 Nigeria2.7%
🇩🇪 Germany1.3%
🇺🇸 United States1.3%
Top 5 of 7 shown

Market sentiment

Posts on X, past 7 days

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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