What Ecosens does

Ecosens AG is a Swiss environmental consulting firm founded in 1990 and headquartered in Wallisellen, with a second office in Fribourg opened in 2013. The firm operates an interdisciplinary service model spanning environmental and energy law, contaminated site investigation, indoor air quality, and radon measurement. It also manufactures and sells its own radon dosimeter product. It employs roughly 50-64 people, with about 30 working part-time, and the partner team is reported to speak 13 languages.

The company serves a mix of large private enterprises and public-sector clients across Switzerland. Disclosed clients span transportation (SBB, OFROU, Lufthansa Aviation Training), banking and mining (UBS, Rio Tinto), testing and certification (SGS), construction and real estate (Implenia, HIAG, Wincasa, Plazza), healthcare and municipal government (University Hospital Zurich, City of Zurich, Canton Thurgau), and nuclear waste management (NAGRA), among others. This breadth suggests a partner-led, mandate-based consulting model in which projects are sold and delivered against regulatory, environmental due-diligence, or operational compliance scopes.

Revenue is generated through professional service fees on consulting mandates plus product sales of the radon dosimeter. The firm holds S-Cert certification for indoor air sampling (held 10+ years) and was recognized as a top-ranked environmental and energy law practice in 2025. In April 2025, Ecosens acquired a majority stake in myx GmbH, extending its capabilities into soil ecology.

Name

Ecosens

Legal name

Ecosens AG

Website

https://ecosens.ch

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

11–50 employees

Short description

Ecosens AG is a Swiss environmental consulting firm founded in 1990 that provides environmental law, contaminated site remediation, indoor air quality, and radon measurement services to enterprises and public-sector clients across Switzerland.

Ownership category

akta.pro rank

Product category

Environmental Consulting Services

NAICS

Environmental Consulting Services (54162), Other Scientific and Technical Consulting Services (54169)

SIC

Services-Commercial Physical & Biological Research (8731), Services-Testing Laboratories (8734)

akta.pro primary industry

Environmental Compliance & Permitting (BPAHAJAA)

akta.pro secondary industry

Environmental Justice & Community Environmental Health (BPAGAGAL)

Keywords

• Environmental consulting
• Contaminated site remediation
• Indoor air quality
• Environmental due diligence
• Radon measurement

Headquarters

HQ city

Wallisellen

HQ country

Switzerland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Environmental Consulting Services: Professional consulting services across contaminated sites, geology, building pollutants, indoor air quality, environmental planning, and environmental/climate law. Services provided to companies, authorities, and private clients.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Ecosens AG is a Swiss environmental consulting firm that provides interdisciplinary advisory and measurement services spanning contaminated site investigation and remediation, building pollutants and indoor air quality, environmental planning (EIA, construction monitoring, soil protection), and environmental and climate law/compliance. Services are delivered to companies, public authorities, and private clients through partner-led engagements, supplemented by a tangible radon dosimeter product that customers mail back for laboratory analysis.

Product overview

Ecosens is an environmental consulting company offering a portfolio of consulting services organized into four main areas: (1) Contaminated Sites & Geology (including contaminated sites, groundwater, geothermal energy, building plots, soil, and shooting ranges), (2) Building & Indoor Climate (asbestos/pollutant analysis, indoor air quality, radon, sustainable construction, GI-Good Indoor Climate label, blower door testing), (3) Environment & Planning (environmental impact assessments, construction monitoring, soil protection, nature/landscape), and (4) Legal & Compliance (environmental law, due diligence, audits, occupational safety). The company also sells a tangible product: Radon Dosimeters for measuring indoor radon concentration. Services are delivered through direct consulting engagements, not via a software platform.

Differentiator

Problem solved

Functional benefit

Products and services

• Contaminated Sites & Geology Services Environmental consulting for contaminated sites, groundwater, geothermal energy, building plot and subsoil investigations, soil and neophytes, and shooting ranges; delivered to industrial, real estate, and public-sector clients in Switzerland.
• Building & Indoor Climate Services Services including asbestos and building pollutant analysis, indoor air quality, residential toxins, radon, sustainable construction, GI-Good Indoor Climate label, and blower door testing; for property owners, developers, and enterprises.
• Environment & Planning Services Environmental Impact Assessments (EIA), environmental construction monitoring, soil protection, nature and landscape studies, and environmental studies and research; for infrastructure projects, developers, and government authorities.
• Legal & Compliance Services Environmental and climate law consulting, Environmental Due Diligence, audits, occupational safety and health, workplace measurements, trainings, and Second Opinion expert assessments; for companies, public authorities, and private clients.
• Environmental Due Diligence Phase I and II environmental due diligence assessments, legal compliance reviews, EHS evaluations, and risk quantification for property transactions and site investigations; for property buyers, investors, and corporate clients.
• Indoor Air Measurements S-Cert certified control measurements of indoor air quality for formaldehyde, volatile organic compounds (TVOC), carbon dioxide, and radon (acceptance measurements); includes expert reports for poor indoor air quality with health/toxicological assessment.
• Workplace Measurements Occupational health measurements including air quality testing for volatile organic compounds (VOC), formaldehyde, and particulate matter to ensure workplace safety compliance; for industrial and commercial employers.
• Radon Dosimeter A tangible radon concentration measurement device for indoor air. Customers receive the dosimeter, use it to measure radon levels, and then return the dosimeter to Ecosens for analysis; marketed as a simple and cost-effective option for private property owners and small businesses.

Named customers18 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Three partnerships are on record, tiered core and minor.

• myx GmbHcoreStrategic or Co-development Partner · 1 April 2025In April 2025, Ecosens acquired majority shares of myx GmbH based in Uster, Switzerland. myx GmbH specializes in soil ecology and environmental consulting. Their extensive knowledge and long experience optimally complement existing Ecosens competencies.
• Federal Office for the Environment (BAFU)minorOthersEcosens expert Lorenz Lehmann authored expert opinion on PFAS contamination from firefighting foams, examining legal questions on cost allocation under Article 32d of the Environmental Protection Act. Published by BAFU.
• Federal Department of Defense, Civil Protection and Sports (VBS)minorOthersEcosens supported VBS in preparing the latest monitoring report on explosives in Swiss lakes. Results showed no negative impact on lake water despite continued high pollution potential.

Scale indicators2 records

Recent moves4 records

Expansion highlights4 records

Broad incumbents

• Bureau Veritas: Global testing, inspection, and certification company with environmental and EHS service lines. Overlaps Ecosens in workplace measurements, indoor air, and compliance auditing, including through its Swiss entity.
• WSP: Global professional services firm (including former Golder) with a sizable Swiss environmental practice. Overlaps Ecosens in site investigation, EIA, and EHS consulting, particularly for infrastructure and real-estate clients.
• TÜV SÜD: International testing, inspection, and certification group with environmental and building-pollutant services. Competes with Ecosens in indoor air quality, radon/building pollutants, and occupational safety testing in Switzerland.
• ERM (Environmental Resources Management): Pure-play global environmental, health, safety, and sustainability consultancy. Directly competes for EHS advisory, environmental due diligence, and climate mandates with multinational Swiss corporate clients.
• Ramboll: International engineering and environmental consultancy with Swiss operations. Competes in contaminated land, environmental due diligence, and climate/sustainability advisory, offering a broader international service portfolio than Ecosens.
• Arcadis: Global design, engineering, and environmental consultancy with a strong Swiss presence. Competes with Ecosens in contaminated site remediation, environmental due diligence, and climate/resilience advisory, but as part of a much broader global portfolio.

Direct peers

• EBP (Ernst Basler + Partner): Swiss planning and engineering consultancy covering environmental impact assessments, climate strategy, contaminated sites, and sustainability advisory — overlapping Ecosens' Environment & Planning and Legal & Compliance practices.
• Holinger AG: Swiss environmental, water, and geoscience consultancy headquartered near Basel. Directly competes with Ecosens in contaminated sites, groundwater, environmental impact assessments, and EHS advisory for Swiss public and private clients.
• CSD Ingenieure AG: Swiss engineering and environmental consultancy operating across contaminated sites, environmental planning, and waste/water management. Directly comparable mid-sized Swiss peer for environmental assessment and remediation services.

Regional players

• Mull und Partner Ingenieurgesellschaft: German-headquartered environmental and geoscience consultancy with activity in the DACH region. Comparable in contaminated site investigation, groundwater, and environmental planning, providing regional cross-border competition for larger Swiss mandates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/ecosens-ag
• Instagraminstagram.com/ecosens.ch

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Ecosens