Best Sustainability Tech Companies in Delft, Netherlands
The 31 best Sustainability Tech companies in Delft, Netherlands in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Deltares.
Our analysis of 293 Sustainability Tech companies
$38.4b in tracked funding; 83% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Sustainability Tech companies in Delft
| # | Company | Disclosed funding | Last round | Employees | Founder | Tech stack | Web popularity | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Deltares Provider of applied research and specialist consultancy services for water management | $15M | 66 mo ago | 986 | — | Google MapsYouTubeMicrosoft ASP.NET+17 | Top 5M | — | — |
| 2 | Physee Provider of transparent BIPV solar panels | $12M | 65 mo ago | 36 | — | — | — | 38 patents Luminescent nanomaterial coatings for greenhouse glazing and solar concentrator devices | — |
| 3 | Solar monkey Provides software for solar installation | $5M | 50 mo ago | 55 | — | PythonDjangoGoogle Cloud+6 | Top 5M | — | — |
| 4 | COVAL Energy Provider of carbon capture and utilization solutions | $4M | 46 mo ago | — | Frank Schreurs Co-Founder | — | — | 3 patents Electrochemical reactors for converting CO₂ into value‑added chemicals/fuels | — |
| 5 | FieldFactors Developer of nature-based rainwater treatment and reuse systems. | $2M | 16 mo ago | — | Wilrik Kok Co-Founder | Cart FunctionalitySquarespace CommerceSquarespace+23 | Top 50M | — | — |
| 6 | DeNoize Manufacturer of smart windows for controlling noise pollution | $1M | 53 mo ago | 8 | Olivier Schevin Co-Founder & Cto | WordPressMySQLPHP+25 | Top 10M | 6 patents Active vibration damping technology for glass windows and thin panels | — |
| 7 | Magneto Provider of magnetocaloric heat pumps for heating and cooling solutions for the renewable energy industry | $1M | 43 mo ago | 5 | — | — | — | 7 patents Magnetocaloric alloys and packed-screen elements for solid-state refrigeration | — |
| 8 | Tarnoc Provider of heating solutions for home | $858K | 16 mo ago | — | Vincent Wijdeveld Co-Founder & CEO | WordPressMySQLPHP+20 | Top 5M | — | — |
| 9 | Nerdalize Cloud-based building energy management software solutions | $852K | 112 mo ago | 14 | — | — | — | 7 patents Active thermal management modules for heat‑generating electronic components | — |
| 10 | Water Energy Intelligence Platform providing data analytics and insights on water management | $820K | 61 mo ago | — | Maria Mortou CEO & MD | — | — | — | — |
| 11 | SolarSwing Provider of solar-based products for use in buildings | $391K | 93 mo ago | 1 | Sam Kin Founder | — | — | — | — |
| 12 | Respyre Developer of bioreceptive concrete and moss-based green wall systems. | $319K | 23 mo ago | 7 | — | WordPressMySQLPHP+13 | Top 5M | — | — |
| 13 | Joulz Smart meter installation, meter reading & data management services provider | $190K | 124 mo ago | 535 | — | SentryLeafletstyled-components+23 | Top 5M | — | — |
Top 12 Sustainability Tech companies in Delft
#1
Seed · Delft, South Holland · founded 2016$2.1Mraised▾
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- Jul 2025Seed$1.9M
- Dec 2016Grant (prize money)$208.2K
#2
Series A · Delft, South Holland · founded 2019$858.2Kraised▾
Provider of heating solutions for home. It develops a heat pump technology that works without an outdoor unit and is connected to the existing climate system (radiators).
- Jun 2025Series A$1.4M
- Nov 2023Seed$858.2K
#3
Seed · Delft, South Holland · founded 2019 · 7 employees$318.6Kraised▾
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- Nov 2024Grant (prize money)$10.5K
- Mar 2023Seed$318.6K
#4
Funding Raised · Delft, South Holland · founded 2008 · 986 employees$15.1Mraised▾
Provider of applied research and specialist consultancy services for water management. The organization delivers expertise related to water, subsurface, and infrastructure. It offers services such as predictions, risk quantification, and actionable warning systems. The organization also focuses on sustainable use of water and soil systems.
- May 2021Grant (prize money)$226.2K
- Jan 2021Grant (prize money)$201K
- Nov 2020Grant (prize money)$179.1K
- Oct 2020Grant (prize money)$211.8K
#5
Series A · Delft, South Holland · founded 2014 · 36 employees$11.5Mraised▾
Provider of transparent BIPV solar panels. It provides users with a platform offering transparent BIPV solar panels. It provides a transparent BIPV Solar Panel which can be substituted for windows in office buildings. This platform also provides real estate solutions like smart skin technology and greenhouse solutions.
- May 2021Series A$4.9M
- Jan 2021Grant (prize money)$60.7K
- Jan 2021Series A$4.9M
- Nov 2020Grant (prize money)$346.7K
#6
Funding Raised · Delft, South Holland · founded 2015$4Mraised▾
COVAL Energy is a provider of carbon capture and utilization solutions. It has developed a high-pressure reactor that enables electrocatalytic reduction of CO2. The carbon is then used for various applications such as electricity storage solutions, CO2 renewable chemicals, liquid syngas, and others.
- Jan 2023Grant (prize money)$2.7M
- Jul 2022Grant (prize money)$53.9K
- May 2021Grant (prize money)$1.3M
#7
Acquired · Delft, South Holland · founded 2005 · 55 employees$5.3Mraised▾
Provides software for solar installation. It offers software which serves solar professionals to design solar systems using an areal view of the installation site. It is also used to calculate the yield of the solar system using LiDAR data and 360-degree analysis.
- Aug 2022Series A$4M
- Mar 2019Seed$1.1M
- Jan 2016Seed$216.7K
#8
Seed · Delft, South Holland · founded 2018 · 5 employees$1Mraised▾
Provider of magnetocaloric heat pumps for heating and cooling solutions for the renewable energy industry. it offers heat pumps that contain magnetocaloric materials which help to convert small temperature differentials into rotational energy. It finds its applications in geothermal energy, solar energy, and more.
- Mar 2023Grant (prize money)$2.7M
- Jul 2022Seed$1M
#9
Series A · Delft, South Holland · founded 2018 · 8 employees$1.3Mraised▾
Manufacturer of smart windows for controlling noise pollution. Its windows are equipped with an active noise cancellation kit that uses electronic sensors, actuators, and controllers to actively cancel transmitted noise in real-time.
- May 2022Series A$1.1M
- Jan 2021Seed$243.4K
#10
Funding Raised · Delft, South Holland · founded 2015$820.1Kraised▾
Platform providing data analytics and insights on water management. Its goal is to make a significant impact on both technical solutions and broader socio-economic and political issues, fostering sustainable approaches.
- Oct 2021Grant (prize money)$353.5K
- Sep 2020Grant (prize money)$313K
- Jun 2020Grant (prize money)$153.6K
#11
Deadpooled · Delft, South Holland · founded 2013 · 14 employees$851.9Kraised▾
Cloud-based building energy management software solutions. The platform offers sustainable energy solutions to power computers. It provides servers in homes from which homeowners get their water heated.
- Jun 2017Seed$851.9K
- Oct 2015Grant (prize money)$43.8K
#12
Seed · Delft, South Holland · founded 2011 · 1 employees$390.8Kraised▾
Provider of solar-based products for use in buildings. Their current product called SolarSwing Reflect is an interior shading system that consists of transparent vertical blinds. The blinds reflect all direct sunlight, while diffuse daylight is fully transmitted. Their upcoming product called SolarSwing Energy is a transparent solar panel that converts direct sunlight into electricity and usable heat, while all diffuse daylight gets transmitted into the building.
- Feb 2019Grant (prize money)$57.3K
- Jan 2015Grant (prize money)$333.5K
- Mar 2013Seed—
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Sustainability Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Climate Adaptation in Delft is moving
A read on the academic research around Climate Adaptation in Delft — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 94 papers.
- Delft University of Technology64
- IHE Delft Institute for Water Education48
- Flood myth1→4
- Flood myth9→21
- Flooding (psychology)4→10
- Climate change1→4
- Resilience (materials science)2→3
- Flood myth19
- Flooding (psychology)8
- Climate change7
- Hydrology (agriculture)6
- Resilience (materials science)5
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.