What NEPSEN does

NEPSEN is a French independent engineering consultancy (bureau d'études) founded in 1986, headquartered in Vincennes and operating from 13 sites across France. The firm specializes in energy and ecological transition services, organized around seven market segments: Territories, Social Housing, Condominiums, Enterprises, Industry, Construction & Development, and Sustainable Mobility. Its service portfolio spans six technical disciplines (BET): ecological transition consulting, sustainable building engineering, renewable energy engineering (notably photovoltaic), eco-efficient industry, low-carbon structure engineering, and a Qualiopi-certified training arm (NEPSEN Formation) that holds exclusive GreenDelta certification for openLCA Life Cycle Assessment training in France.

The company's technical methods include openLCA-based Life Cycle Assessment (ISO 14040/14044/14067), Bilan Carbone carbon footprint assessment, OCARA climate resilience diagnostics, energy audits, project management (MOE), and Assistance à Maîtrise d'Ouvrage (AMO). NEPSEN is structured as a Société à Mission under French law, formalizing its social and environmental purpose. Its revenue model is professional-services based, combining project-based consulting engagements with recurring training revenue; the only disclosed training price is €1,100 HT per participant for the 2-day openLCA LCA course.

NEPSEN serves a diversified client base spanning public authorities, social housing providers, universities, healthcare organizations, and industrial enterprises. Notable customers include Université de Bordeaux, ANAP, INRAE, French Tech, Etienne Lacroix, ADOMA, i2S, Taransaud, and Piercan. The firm remains privately held with no disclosed external funding rounds, M&A activity, or parent company, operating as a founder-controlled, self-financed independent consultancy.

Name

NEPSEN

Legal name

NEPSEN

Website

https://nepsen.fr

Company type

Private

Founded year

1986

Operating status

Operating

Headcount range

51–100 employees

Short description

NEPSEN is a privately held French independent engineering consultancy founded in 1986, operating from 13 sites and specializing in energy and ecological transition services (carbon assessment, LCA, renewable energy engineering, building energy, and Qualiopi-certified openLCA training) for public authorities, social housing providers, and industrial enterprises.

Ownership category

akta.pro rank

Product category

Energy and Ecological Transition Engineering Consulting

NAICS

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

SIC

Services-Management Consulting Services (8742)

akta.pro primary industry

Sustainability & ESG Consulting (BPAHACAK)

akta.pro secondary industries

GHG Accounting & Net-Zero/Decarbonization Planning (Scopes 1–3) (EUAHAJAC), Benchmarking, Ratings & Stakeholder Reporting Portals (Scorecards, Dashboards) (EUABAEAJ)

Keywords

• Energy transition consulting
• Ecological engineering services
• Carbon footprint assessment
• Renewable energy engineering
• Sustainable building consulting

Headquarters

HQ city

Créteil

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consulting Services: NEPSEN generates revenue through professional engineering consulting services including energy audits, feasibility studies, project management (MOE), and Assistance à Maîtrise d'Ouvrage (AMO) for energy transition and ecological projects.
2. Training Services: Revenue from professional training programs in energy transition, Life Cycle Assessment, and climate adaptation. Training is Qualiopi-certified and eligible for OPCO funding support.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

NEPSEN is an independent French engineering consultancy (bureau d'études) providing specialized consulting and engineering services in energy and ecological transition. Its offerings span energy audits, carbon footprint assessments (Bilan Carbone), Life Cycle Assessments (LCA) using openLCA, climate resilience assessments (OCARA), renewable energy engineering (photovoltaic), sustainable building engineering, low-carbon structural engineering, eco-efficient industry consulting, and corporate decarbonation strategy. The firm also operates NEPSEN Formation, delivering Qualiopi-certified and GreenDelta-certified professional training.

Product overview

NEPSEN is an independent engineering consultancy specializing in energy and ecological transition for 40 years. The company offers a comprehensive portfolio of consulting and engineering services organized by market segments: Territories & Local Authorities, Social Housing, Co-ownership Properties, Enterprises, Industry, Construction & Planning, and Sustainable Mobility. Within these markets, NEPSEN operates through distinct service lines: ecological transition consulting (including climate adaptation and carbon footprint), sustainable building engineering, renewable energy engineering (photovoltaic), eco-efficient industry engineering, low-carbon structure engineering, and professional training. The portfolio is characterized by specialized engineering disciplines (BET) serving different sectors, rather than a unified software product. A notable training offering is the ACV openLCA certification course for life cycle assessment.

Differentiator

Problem solved

Functional benefit

Products and services

• Conseil en transition écologique (Ecological Transition Consulting)
• BET Energie Bâtiment (Sustainable Building Energy Engineering)
• BET Energies Renouvelables (Renewable Energy Engineering)
• BET Industrie (Eco-efficient Industry Engineering)
• BET Structure Bas Carbone (Low-Carbon Structural Engineering)
• Formation ACV openLCA (Life Cycle Assessment Training)
• Accompagnement Territoires et Collectivités (Local Authorities Advisory)
• Accompagnement Logement Social (Social Housing Advisory)
• Accompagnement Copropriétés (Condominium Advisory)
• Accompagnement Entreprises et Décarbonation (Corporate Decarbonation Advisory)

Quantifiable outcome

• 40 years of expertise in energy and ecological transition
• +3 more outcomes

Named customers14 records

Segments7 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• GreenDeltacoreTechnology or IntegrationGreenDelta is the developer of openLCA software. NEPSEN has obtained official certification from GreenDelta to deliver openLCA training, representing the only such certified training provider in France according to the company.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• Greenly: France-based carbon accounting SaaS platform that also offers carbon footprint and CSRD advisory services. Adjacent competitor targeting the lower-end Bilan Carbone and CSRD workflow that NEPSEN's consulting teams serve.
• BL Évolution: French sustainability and CSR strategy consultancy supporting organizations with carbon assessment, CSRD, and sustainable development strategy — comparable SME-level CSRD and sustainability advisory footprint to NEPSEN.

Direct peers

• EcoAct (now part of PwC): Originally a French carbon strategy consultancy (now within PwC France) providing carbon footprint, LCA, and net-zero advisory to enterprises and public bodies — direct overlap with NEPSEN's LCA, Bilan Carbone, and CSRD services.
• Enea Consulting: French independent consultancy focused on energy transition, climate, and environmental economics for public and private clients. Overlaps with NEPSEN's advisory and territorial energy transition work.
• Quantis: International sustainability and environmental impact consultancy with strong LCA and product carbon footprint expertise serving global consumer goods, food, and industrial clients — comparable scope to NEPSEN's industrial LCA practice.
• Carbone 4: Independent French carbon strategy and climate consultancy and creator of the Bilan Carbone methodology. Co-developed the OCARA framework that NEPSEN deploys, and competes head-to-head for French CSRD and decarbonation mandates.
• Algoé: French independent consultancy advising public and private clients on energy transition, sustainable development, and territorial planning, headquartered in Lyon. Direct overlap with NEPSEN's Territories and Entreprises verticals.
• Inddigo (now part of Artelia): French consultancy specialized in sustainable building, energy efficiency, and renewable energy engineering. Competes directly with NEPSEN's BET Bâtiment durable and BET Energies Renouvelables service lines.
• Ginger Group: French environmental and engineering consultancy with deep expertise in site assessment, environmental impact studies, and ecological transition — comparable regulatory advisory and BET-style engineering delivery model.

Broad incumbents

• Bureau Veritas: Global testing, inspection and certification giant with a substantial sustainability services line (carbon, energy, ESG assurance) in France. Competes for the same large enterprise and public-sector CSRD/energy mandates from a much broader platform.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UC0i0D3cqJLe0LEkmwtqkS2w
• LinkedInlinkedin.com/company/nepsen
• Xx.com/GroupeNepsen

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

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 NEPSEN