NRGYS

What NRGYS does

NRGYS is an independent French thermal and fluid engineering consultancy founded in 2005 in Nantes by engineer Patrice Normand. The firm specializes in energy performance engineering and regulatory compliance for the built environment, serving real estate developers (Nexity, Bouygues Immobilier, Kaufman & Broad), social housing providers (Espacil Habitat, Clairsienne), property managers (Foncia, Citya), public entities, and select industrial and commercial clients (Vinci, EDF CNPE du Blayais, GRTgaz, Fleury Michon, Bricomarché). Service lines span RE 2020 thermal studies, energy audits, Assistance à Maîtrise d'Ouvrage, Conception et Maîtrise d'Œuvre Fluides (BIM-based design and construction oversight), instrumented energy performance monitoring, and strategic advisory.

The company's technical stack combines professional engineering services with a portfolio of proprietary digital tools: Smart NRGYS (connected energy monitoring), Vivre Son Habitat (project/performance tracking), My NRGYS (client portal), NRGYS Pro (professional platform), and Optimys (pre-study thermal and energy analysis software). The firm holds OPQIBI qualifications 1331, 1332, and 1911 with RGE mention and is GDPR-compliant. In January 2025 the firm restructured governance, appointing Yann Jouanne as Director General while Patrice Normand became President. NRGYS operates from 7 regional offices across France (Nantes headquarters, Paris, Bordeaux, Lyon, Rennes, Lorient, Tours) and generates revenue through project-based professional services contracts, with pricing determined per engagement depending on scope, building type, and mission complexity.

Name

NRGYS

Legal name

NRGYS

Website

https://nrgys.fr

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

101–250 employees

Short description

NRGYS is an independent French thermal and fluid engineering consultancy founded in 2005 that delivers RE 2020 compliance studies, energy audits, fluid systems design, and energy performance monitoring to real estate developers, social housing providers, public entities, and property managers via 7 regional offices across France.

Ownership category

akta.pro rank

Headquarters

HQ city

Nantes

HQ country

France

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering and Consulting Services: NRGYS generates revenue through professional services including thermal and environmental studies, energy audits, design and engineering (Maîtrise d'œuvre fluides), assistance to project owners (AMO), energy performance monitoring, and advisory services. Revenue is project-based and service-oriented, typical of engineering consultancy firms.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

NRGYS is a French thermal design office (bureau d'études thermiques et fluides) that provides thermal and fluid engineering consulting to real estate developers, social housing providers, public entities, and architectural firms. Its work spans energy performance studies, energy audits, AMO (Assistance à Maîtrise d'Ouvrage), thermal and fluid design, and ongoing energy monitoring, supported by proprietary digital tools such as Smart NRGYS and Optimys.

Product overview

NRGYS is a unified thermal and fluid engineering consultancy platform offering both proprietary digital tools and professional services. The core product portfolio includes Smart NRGYS (connected energy monitoring), Vivre Son Habitat (digital habitat tracking), My NRGYS (client portal), NRGYS Pro (professional platform), and Optimys (pre-study software). These digital tools are complemented by a comprehensive service offering covering audit and studies (RE 2020, BBC labels), Assistance à Maîtrise d'Ouvrage, Conception et Maîtrise d'Œuvre Fluides, Suivi de Performance Energétique, and Conseil. The company operates from 7 agencies across France (Nantes HQ, Paris, Bordeaux, Lyon, Rennes, Lorient, Tours).

Differentiator

Problem solved

Functional benefit

Brands

• My NRGYS: Client portal for project management and tracking.
• NRGYS Pro
• Vivre Son Habitat
• Optimys
• Smart NRGYS

Products and services

• Thermal and Fluid Engineering Studies (Études Thermiques et Fluides) Core consulting engagement covering thermal performance studies and HVAC/fluid design for new construction and renovation projects; delivered to French real estate developers, social housing providers, public entities, and architectural firms.
• Energy Audits (Audits Énergétiques) Energy audit services for existing and planned buildings, supporting regulatory compliance, retrofit decisions, and efficiency improvement for property owners and public-sector clients.
• AMO (Assistance à Maîtrise d'Ouvrage) Project-owner assistance (Assistance à Maîtrise d'Ouvrage) service supporting clients through thermal and energy-related aspects of construction or renovation programs.
• Smart NRGYS Proprietary digital energy monitoring solution used to track and manage building energy performance, typically as a recurring service extending NRGYS engagements beyond one-off studies.
• Optimys Optimization-oriented product within the NRGYS portfolio, supporting improved building energy performance.

Quantifiable outcome

• RE 2020 compliance attestation for new residential and tertiary buildings
• +2 more outcomes

Named customers17 records

Segments5 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Scale indicators4 records

Recent moves13 records

Expansion highlights5 records

Direct peers

• INDDIGO: French engineering consultancy specializing in sustainable building, energy performance, and environmental studies for real estate and public-sector clients. Directly comparable to NRGYS in services, client profile, and France-only geographic footprint.
• TERAO: French building energy and environmental engineering consultancy providing thermal studies, AMO, and energy performance services. Closely overlaps NRGYS in service mix and target customer (developers, social housing, tertiary sector) in France.
• AI Environnement: French environmental and energy engineering firm focused on building energy audits, regulatory thermal studies, and decarbonization roadmaps. Directly comparable mid-size French specialist serving similar regulatory-driven workflows.

Broad incumbents

• Egis: Large French engineering group with a building and energy practice spanning thermal studies, AMO, and decarbonization. Overlaps with NRGYS in regulatory-driven thermal and energy services but offers a much broader portfolio and international presence.
• Artelia: Major French engineering consultancy with significant building services and energy efficiency practices. Comparable on thermal and fluid engineering but at much larger scale and broader sector coverage.
• Setec: French multidisciplinary engineering group with building, energy, and environmental capabilities. Competes with NRGYS on portions of thermal and regulatory engineering but with a broader service portfolio and larger project scale.
• Tractebel (Engie): International engineering consultancy owned by Engie with a strong presence in French building energy and decarbonization projects. Adjacent competitor on large-scale thermal and energy studies for tertiaries and infrastructure.
• GreenFlex: French energy and environmental consultancy focused on corporate and real estate energy efficiency, with overlapping RE 2020 and Tertiary Decree service lines. Larger and broader in scope than NRGYS.

Emerging players

• Deepki: French SaaS platform for ESG and energy performance in real estate portfolios. Targets the same regulatory pain points as NRGYS (Tertiary Decree, energy reduction trajectories) but via a software/data model rather than engineering services. Represents both a potential complement and substitute for parts of NRGYS's value chain.

Others

• Nobatek INEF4: French building energy R&D center and consultancy working on energy efficiency and decarbonization R&D projects. Adjacent rather than directly competitive, but operates in the same French building energy ecosystem and sometimes partners with engineering firms like NRGYS.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/nrgysnantes

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 NRGYS