IDEX
IDEX is a French vertically integrated low-carbon energy operator that produces, distributes, and optimizes local renewable heat and electricity for buildings, cities, and industry across France, Belgium, and Lithuania, serving 18,000 buildings and 15,000 energy delivery points.
- Company typePrivate
- Founded1963
- HeadquartersBoulogne-billancourt, France
- Headcount5,001–10,000
- GTM typeB2B
- OfferingServices
What IDEX does
IDEX is a France-headquartered, vertically integrated local energy operator that develops, finances, builds, and operates low-carbon energy infrastructure for buildings, cities, and industry. The company's production stack draws on local renewable and recovered sources — household waste via energy-from-waste plants, biomass, deep and surface geothermal, solar PV, and recovered industrial heat — distributed through 83 owned heating and cooling networks to 18,000 maintained buildings. Downstream of production, IDEX supplies green electricity and biomethane through its Save Énergies subsidiary (15,000 delivery points, 12 TWh/year), runs Energy Performance Contracts and third-party-financed renovation programs, and provides multi-technical facility management and industrial utilities (steam, cooling, compressed air, cogeneration). Customer segments span industry, state and local government, private tertiary, healthcare, and residential, served through 110 local agencies across France, with international operations in Belgium (Go4Green, FABEM JV with Alteo) and Lithuania (Idex Baltic). The company employs approximately 6,500 people, generated €2.1 billion in 2025 revenue, and has been owned by Antin Infrastructure since 2018, with Benjamin Fremaux as CEO and Antoine Pellion as Deputy CEO in charge of development. Technology differentiation rests on a digital-twin-based AI heating-cost individualization partnership with Kocliko, predictive optimization of building energy use, and a 250 MWp solar pipeline integrated with EV charging infrastructure.
IDEX firmographics
Firmographics- Name
- IDEX
- Legal name
- IDEX SERVICES, SAS
- Website
- http://www.idex.fr/
- Company type
- Private
- Founded year
- 1963
- Operating status
- Operating
- Headcount range
- 5,001–10,000 employees
- Short description
- IDEX is a French vertically integrated low-carbon energy operator that produces, distributes, and optimizes local renewable heat and electricity for buildings, cities, and industry across France, Belgium, and Lithuania, serving 18,000 buildings and 15,000 energy delivery points.
- Ownership category
- akta.pro rank
IDEX industry classification
Industry- Product category
- District Energy & Low-Carbon Infrastructure Services
- NAICS
- Steam and Air-Conditioning Supply (221330), Electric Power Generation (22111), Biomass Electric Power Generation (221117)
- SIC
- Cogeneration Services & Small Power Producers (4991), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)
- akta.pro primary industry
- Biofuel Plant EPC, O&M & Process Technology Providers (EUAAAHAK)
- akta.pro secondary industries
- Waste Heat Recovery & Heat Integration (HRSG/ORC, Pinch Analysis, Heat Exchangers) (EUABAJAF), Retail Supply + DER/Virtual Power Plant Bundles (Solar, Storage, DR) (EUAGABAI)
Keywords
Where IDEX is headquartered
LocationHeadquarters
- HQ city
- Boulogne-billancourt
- HQ country
- France
- HQ region
- Europe
Offices2 records
Markets served
IDEX business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Infrastructure, Operations, Supply Chain, Technology or R&D, Marketing or Sales
Revenue model
- Energy Production and Distribution: IDEX generates revenue from operating energy production facilities (waste-to-energy plants, biomass boilers, geothermal systems) and distributing energy through owned heating and cooling networks. Revenue is derived from long-term concessions and delegated management agreements with municipalities and industrial clients, providing stable, recurring income streams.
- Energy Performance Contracts (CPE): Performance-based contracts guaranteeing energy savings to clients. IDEX finances, designs, and implements modernization and renovation work, recouping investment through shared savings over contract duration. Provides visibility on long-term revenue with performance risk shared with client.
- Third-Party Financing (Tiers Financement): IDEX finances energy transition projects for clients, spreading installation costs over several years while maintaining operation and maintenance responsibilities. Revenue is generated through energy savings achieved and contract duration.
- Energy Supply (via Save Énergies): Through subsidiary Save Énergies, IDEX supplies green electricity and biomethane to businesses and municipalities. Revenue from volume-based energy sales with 15,000 delivery points under management and 12 TWh of energy supplied annually.
- Industrial Utilities Services: Design, installation, and maintenance of industrial utility production facilities (steam, cooling, compressed air, electricity, hot water). Revenue from project fees and ongoing maintenance contracts with industrial clients.
- EV Charging Infrastructure (IRVE): Installation and operation of electric vehicle charging stations. Revenue from equipment installation fees and ongoing operation/maintenance contracts, plus energy sales to EV users.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Outcome Based/ Performance | Multi-year contract | Custom energy performance contracts with guaranteed savings |
| Subscription | Monthly | Heating network connection with stable energy pricing |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels9 records
IDEX product offering
Product offeringCore offering
IDEX develops, designs, finances, builds, and operates local low-carbon energy infrastructure that produces heat, cold, and electricity from waste, biomass, geothermal, and solar resources, and distributes it through district heating and cooling networks to residential, tertiary, industrial, and public-sector customers. The company also supplies green electricity and biomethane, delivers energy performance contracts (CPE) with guaranteed savings, manages industrial utilities (steam, cooling, compressed air, cogeneration), and provides multi-technical facility management. Its offering covers the full value chain from production to end-use optimization under a single integrated operator.
Product overview
IDEX operates as a vertically integrated operator across the entire local low-carbon energy value chain in France and internationally. Its portfolio spans five interconnected core pillars: (1) Energy production from local renewable and recovered sources — including district heating/cooling networks, waste-to-energy plants, biomass boilers, geothermal systems, and solar photovoltaic infrastructure; (2) Energy supply through its Save Énergies subsidiary, offering green electricity, biomethane, and innovative procurement instruments (PPA, BPA, Bloc+Spot hybrid contracts); (3) Building energy management encompassing energy performance contracts, intelligent piloting, heat pumps, and heating cost individualization via the Kocliko platform; (4) Industrial utility services including cogeneration, steam, cooling, and compressed air; and (5) Multi-technical and facility management through the MUST subsidiary. The company also operates electric vehicle charging infrastructure and connected solar parking solutions as modular add-on services. This architecture means clients can engage IDEX at any point in the energy chain — from production through supply to consumption optimization — using one integrated operator.
Differentiator
Problem solved
Functional benefit
Brands
- Save Énergies: Energy supply subsidiary providing electricity and biomethane solutions
- MUST
- Sérénélis
- Kocliko
Products and services
- District Heating and Cooling Networks Urban heating and cooling networks developed, financed, built, and operated by IDEX that distribute renewable and recovered energy (geothermal, biomass, waste heat, solar) to buildings via a short-circuit model. Sold to municipalities, social landlords, and building owners under 20–25 year concessions and DSP contracts.
- Energy from Waste Plants (Centres de Valorisation Énergétique) Waste-to-energy plants that convert household and industrial waste into heat and electricity, supplying renewable energy to district heating networks and the grid. Sold to public-sector clients (e.g., SMDO) and operated under long-term concessions.
- Biomass Energy Solutions Biomass boiler plants and combined heat and power (CHP) units designed, financed, built, and operated by IDEX to supply decarbonized steam, heat, and electricity to industrial clients and district networks. Includes joint-venture projects such as the €70M Brest biomass plant with Guyot Énergies.
- Surface and Deep Geothermal Energy Surface geothermal (GMI — probes and groundwater) and deep geothermal systems coupled with heat pumps, supplying renewable heating and cooling to buildings with up to 90% reduction in greenhouse gas emissions compared to gas. Sold to industrial, tertiary, and residential customers.
- Solar Photovoltaic Infrastructure
- Industrial Utilities (Steam, Cooling, Compressed Air, Cogeneration) Design, installation, operation, and maintenance of industrial utility production facilities including electricity cogeneration, steam and superheated water, compressed air, vacuum systems, and cooling for manufacturing clients. Sold to industrial enterprises.
- Energy Performance Contracts (CPE) Global energy performance contracts for buildings and industrial sites, combining audit, renovation works, third-party financing, and guaranteed energy savings. Sold to public-sector clients (e.g., Université de Bordeaux, CHU Amiens), healthcare operators (Groupe SOS Seniors), and enterprises.
- Multi-Technical and Facility Management Integrated multi-technical maintenance and facility management for buildings and industrial sites, covering HVAC, electrical, plumbing, green spaces, reception, security, and cleaning. Sold to enterprises, public-sector clients, and social landlords.
- Low-Carbon Energy Supply (Save Énergies) Through the Save Énergies subsidiary, IDEX supplies green electricity and biomethane to businesses and public clients. Includes Corporate Power Purchase Agreements (PPA), Biomethane Purchase Agreements (BPA), and hybrid Bloc+Spot contracts. Sold to enterprises and municipalities.
- MUST — Multi-Service Housing Solutions Through the MUST subsidiary, IDEX provides comprehensive multi-service technical management for social landlords, covering plumbing, electrical, carpentry, locksmithing, ventilation, and common-area maintenance across large housing portfolios. Sold to social housing operators.
Quantifiable outcome
- 20-60% energy savings achievable through modernization and renovation work
- +10 more outcomes
Companies that use IDEX
Customer profileNamed customers15 records
Segments5 records
Ideal customer profiles5 records
IDEX technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
AI capability5 records
Feature4 records
IDEX partnerships and signals
Strategic signalPartnerships
13 partnerships are on record, tiered flagship, core and minor.
- Alteo GroupflagshipIDEX partnered with Belgian group Alteo to create FABEM (joint venture), accelerating deployment in the Benelux region. This partnership marks IDEX's strategic expansion beyond France into Belgium, focusing on decarbonation solutions.
- Charwood EnergycoreCharwood Energy secured two new biomass projects in partnership with IDEX. IDEX provides expertise in energy transition while Charwood contributes biomass project development capabilities.
- UCLouvaincoreIDEX partnered with UCLouvain university for the Mont-Saint-Guibert biomass power plant project in Belgium. First cornerstone laid June 2026, marking IDEX's entry into Belgian market.
- Guyot ÉnergiescoreJoint €70M investment in industrial biomass heating plant to supply the Bunge factory in Brest. IDEX and Guyot Énergies co-invest in this local, low-carbon energy production facility.
- Idex School (Training Partnership)minorFirst anniversary of IDEX training class focused on energy transition. Partnership with educational institutions to develop talent pipeline for the energy transition sector.
- Save ÉnergiescoreSave Énergies is IDEX's subsidiary handling energy supply (electricity and gas) with all necessary Ministry of Energy certifications for supply across France. Manages 15,000 delivery points and 12 TWh annually.
- 250 Biomethane ProducerscoreNetwork of 250 biomethane producer partners supplying 3 TWh/year of French-produced biomethane with full traceability. IDEX aggregates this production for supply to end customers.
- Various Renewable Energy ProducerscoreNetwork of producers across biomethane, photovoltaic, and hydroelectric sources enabling IDEX to guarantee renewable and local origin of supplied energy with complete traceability.
- KOCLIKOcoreIDEX partners with KOCLIKO for AI-powered individualization of heating costs. KOCLIKO provides the intelligent, equitable heating cost allocation solution using digital twin technology, while IDEX handles financing, installation, and maintenance.
- KodikominorPartnership with Kodiko association allowing IDEX employees to support refugees in their employment pathway during working hours. Part of broader diversity and inclusion initiatives.
- Tent FranceminorIDEX joined Tent France coalition of 30+ companies committed to economic integration of refugees, since November 2023.
- ESATs and Sheltered CompaniesminorPartnership network for supported employment of people with disabilities, including organizations such as TH Conseil, Gloria, and Café Joyeux.
- Elles BougentminorAssociation promoting engineering and technical careers to young women; IDEX participates in school presentations through the Idex School Tour.
Scale indicators17 records
Recent moves7 records
Expansion highlights5 records
IDEX competitors and assessment
Company assessmentDirect peers
- Dalkia: Dalkia (subsidiary of EDF) is the leading French district heating and energy services operator, directly competing with IDEX in heating/cooling networks, energy performance contracts, and industrial utilities across France.
- ENGIE Solutions: ENGIE Solutions is the B2B energy services arm of the French utility ENGIE, directly competing with IDEX in district heating networks, multi-technical facility management, and energy performance contracts for industrial and public-sector clients.
- Veolia Environmental Services: Veolia operates district heating networks and waste-to-energy plants in France and Europe, overlapping with IDEX's core activities in waste valorization, biomass energy, and urban heating/cooling infrastructure.
- EQUANS: EQUANS (Bouygues subsidiary) is a major European multi-technical and energy services provider competing with IDEX in energy performance contracts, HVAC, industrial utilities, and building energy management.
- Coriance: Coriance is a French operator specializing in district heating and cooling networks from renewable and recovered energy sources, competing directly with IDEX on urban heating concessions and biomass/geothermal projects.
- Bouygues Energies & Services: Bouygues Energies & Services provides multi-technical building and infrastructure energy services in France, including district heating installations and energy efficiency contracts, directly overlapping with IDEX's building energy management offering.
- Eiffage Energie Systèmes: Eiffage Energie Systèmes is a major French energy services contractor delivering district heating, biomass, photovoltaic, and multi-technical services for public and private clients, comparable to IDEX's integrated energy infrastructure business.
- SPIE France: SPIE France provides multi-technical electrical, mechanical, and energy services including energy efficiency, EV charging, and photovoltaic installations, competing with IDEX in technical facility management and renewable energy deployment.
Broad incumbents
- Vattenfall Heat: Vattenfall Heat is one of Europe's largest district heating operators, primarily in Northern Europe (Sweden, Germany, Netherlands), offering a benchmark for IDEX's international expansion ambition in Benelux and adjacent markets.
Others
- METabolic / Saverglass: Metherma is a Dutch geothermal heat network operator and integrator adjacent to IDEX's geothermal and district heating business, illustrating the European player ecosystem IDEX is targeting via FABEM.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
IDEX social profiles
Digital presenceIDEX compliance and trust
Trust signalCompliance1 record
IDEX financial estimates
Financial estimateRevenue estimate
Valuation estimate
IDEX leadership team
Management profileNumber of profiles
Profiles19 records
IDEX subsidiaries and ownership
Company hierarchySubsidiaries7 records
IDEX funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
IDEX M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about IDEX
What does IDEX do?
IDEX develops, designs, finances, builds, and operates local low-carbon energy infrastructure that produces heat, cold, and electricity from waste, biomass, geothermal, and solar resources, and distributes it through district heating and cooling networks to residential, tertiary, industrial, and public-sector customers. The company also supplies green electricity and biomethane, delivers energy performance contracts (CPE) with guaranteed savings, manages industrial utilities (steam, cooling, compressed air, cogeneration), and provides multi-technical facility management. Its offering covers the full value chain from production to end-use optimization under a single integrated operator.
Is IDEX a public or private company?
IDEX is a private company. It is classified as private equity controlled and is currently operating.
When was IDEX founded?
IDEX was founded in 1963. It employs 5,001 to 10,000 people.
Where is IDEX based?
IDEX is headquartered in Boulogne-billancourt, France, in the Europe region.
How does IDEX make money?
Six revenue lines are on record. Energy Production and Distribution is the primary driver. The others are energy Performance Contracts (CPE), third-Party Financing (Tiers Financement), energy Supply (via Save Énergies), industrial Utilities Services and EV Charging Infrastructure (IRVE).
Who are IDEX's main competitors?
Direct peers on record are Dalkia, ENGIE Solutions, Veolia Environmental Services, EQUANS, Coriance, Bouygues Energies & Services, Eiffage Energie Systèmes and SPIE France. Vattenfall Heat is listed as a broad incumbent. METabolic / Saverglass is listed as an others.
Does IDEX have an API?
No public API is recorded for IDEX.
What industry is IDEX in?
IDEX's product category is District Energy & Low-Carbon Infrastructure Services. Its primary akta.pro industry code is EUAAAHAK, Biofuel Plant EPC, O&M & Process Technology Providers, with a secondary code of EUABAJAF, Waste Heat Recovery & Heat Integration (HRSG/ORC, Pinch Analysis, Heat Exchangers). Its NAICS code is 221330 and its SIC code is 4991.