What Oktave does

Oktave is a regional public service for energy renovation in the Grand Est region of France, created in 2016 by the Région Grand Est and ADEME (Agence de la transition écologique) and operated as a Société d'Économie Mixte (SEM). It provides free technical, administrative, and financial accompaniment to individual homeowners and housing cooperatives (copropriétés) across Alsace, Lorraine, and Champagne-Ardenne, with eight local offices (Strasbourg headquarters plus Colmar, Mulhouse, Metz, Nancy, Saint-Dié, Charleville-Mézières, and Reims). The service delivers a structured six-step journey (initial home visit, accompaniment contract, contractor consultation, work launch, construction monitoring, and work acceptance) and connects clients with a vetted network of RGE-certified artisans.

The core product is the Accompagnement Rénovation Énergétique service, which includes a regulatory energy audit, an online aid simulator, and financing engineering covering pre-financing of subsidies (MaPrimeRénov', CEE, Climaxion, Eco-PTZ, Copro 100, Prêt Avance Rénovation). Oktave holds the official Mon Accompagnateur Rénov' (MAR) accreditation from ANAH, making it a mandatory intermediary for households seeking MaPrimeRénov' Parcours Accompagné since January 2024. The company does not operate proprietary software platforms; its technology footprint is limited to a website with an online simulator and a "Mon espace" client portal.

The business model is publicly funded rather than transaction-based. End users receive advisory services free of charge; revenue is derived from public funding, regional subsidies, and partnership agreements with the Grand Est Region and ADEME. As of 2024, Oktave has signed 1,000+ individual house renovation contracts and accompanied 800+ copropriétés, with cumulative works engaged of approximately €228M (€150M copropriétés + €80M individual houses). The GTM motion is sales-led and advisor-assisted, combining direct home visits, toll-free phone, an online appointment channel, regional events (e.g., Salon de l'Habitat de Nancy), educational content, and a referral program offering €100 Kadéos gift cards. The entity is not a venture or private equity target — it is a government-state entity operating under the governance of the Région Grand Est.

Name

Oktave

Legal name

Oktave

Website

https://oktave.fr

Company type

Private

Operating status

Operating

Headcount range

51–100 employees

Short description

Oktave is the Région Grand Est's and ADEME's official energy renovation accompaniment service, providing free technical, administrative, and financial advisory to individual homeowners and housing cooperatives across Alsace, Lorraine, and Champagne-Ardenne.

Ownership category

akta.pro rank

Product category

Energy Renovation Advisory Services

NAICS

Environmental Consulting Services (541620)

SIC

Services-To Dwellings & Other Buildings (7340), Services-Facilities Support Management Services (8744)

akta.pro primary industry

Real Estate ESG / Sustainability & Resilience Advisory (Decarbonization, Climate Risk) (BPAJANAI)

Keywords

• Energy renovation advisory
• Home energy audits
• Subsidy pre-financing
• Thermal insulation services
• Public housing service

Headquarters

HQ city

Strasbourg

HQ country

France

HQ region

Europe

Offices8 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Public service funding (free advisory for end users): Oktave is a SEM (Société d'Economie Mixte) established by the Grand Est Region and ADEME. It provides free energy renovation advisory services to homeowners and housing cooperatives. Revenue is derived from public funding, subsidies, and partnership agreements with regional authorities rather than direct fees from end customers. The service helps mobilize and pre-finance subsidies, CEE (Certificates of Energy Savings) primes, MaPrimeRénov' aid, and other regional financing instruments.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels6 records

Core offering

Oktave is a regional public accompaniment service for energy renovation established by the Grand Est Region and ADEME. It guides homeowners and housing cooperatives (copropriétés) through a structured 6-step process (initial home visit, contract signing, contractor consultation, work launch, construction monitoring, work acceptance), providing technical advisory, energy audits, access to a vetted network of RGE-certified artisans, and financial engineering including pre-financing of subsidies (MaPrimeRénov', CEE, Climaxion, Eco-PTZ). As an officially accredited Mon Accompagnateur Rénov' (MAR) since 2023, it serves as a mandatory intermediary for state subsidies in the Grand Est territory.

Product overview

Oktave is a regional energy renovation service operated by the Grand Est Region and ADEME. The core offering is the Accompagnement Rénovation Énergétique service, which provides comprehensive technical, administrative, and financial guidance through all phases of renovation projects. As an officially accredited Mon Accompagnateur Rénov' (MAR) since 2023, Oktave offers energy audits, access to certified RGE artisans, and financing solutions including aid pre-financing. The portfolio includes specialized service modules for insulation (walls, roof, floor, ceiling, windows), heating systems (heat pumps, boilers), ventilation (VMC single and double flow), and both individual homes and co-ownership renovations. An online aid simulator helps homeowners estimate financial assistance eligibility. The service operates exclusively in the Grand Est region of France (Alsace, Lorraine, Champagne-Ardenne) covering cities including Strasbourg, Colmar, Mulhouse, Metz, Nancy, and Reims.

Differentiator

Problem solved

Functional benefit

Products and services

• Accompagnement Rénovation Énergétique Core technical and financial accompaniment service for individual homeowners undertaking whole-house energy renovation projects, covering initial assessment, contract design, contractor consultation, work launch, monitoring, and final acceptance.
• Mon Accompagnateur Rénov' (MAR) Officially accredited public accompaniment service for energy renovation, providing mandatory technical, administrative, and financial support required to access MaPrimeRénov' Parcours Accompagné state subsidies.
• Audit Énergétique Regulatory energy audit service that analyzes a property's current state and proposes several work scenarios with estimated costs and financing options as the first step of a global renovation project.
• Simulateur d'Aides Oktave Online aid simulator that estimates potential financial assistance eligibility based on three questions about property type, income level, and household size, serving as a lead-generation and qualification tool.
• Rénovation Copropriété Dedicated energy renovation service line for co-ownership properties, covering common-area work including facade insulation, roof insulation, collective heating systems, VMC, and window replacement in shared areas.
• Financement et Préfinancement des Aides Financial engineering service bundling aid pre-financing, Eco-PTZ loans, Copro 100 loans, Prêt Avance Rénovation, and personalized financing solutions to preserve household borrowing capacity during renovation projects.

Quantifiable outcome

• Average 60% reduction in energy bills per renovated house
• +5 more outcomes

Named customers4 records

Segments7 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Eight partnerships are on record, tiered core, flagship and minor.

• Région Grand EstcoreStrategic or Co-development PartnerRégion Grand Est is Oktave's founding public partner, co-establishing the service alongside ADEME to serve as the region's official energy renovation companion. The Region provides the mandate, public funding, and territorial reach for Oktave's operations across Alsace, Lorraine, and Champagne-Ardenne.
• ADEME (Agence de la transition écologique)coreStrategic or Co-development PartnerADEME (Agence de la transition écologique) co-founded Oktave with the Grand Est Region. As France's ecological transition agency, ADEME provides scientific expertise, methodological support, and co-funding for Oktave's energy renovation programs.
• Climaxion (Grand Est regional energy aid program)flagshipGTM or Marketing PartnerClimaxion is the Grand Est region's energy transition aid program. Oktave integrates Climaxion subsidies into its financing solutions for both individual homeowners and housing cooperatives. The Climaxion logo appears on Oktave's website as a supporting partner.
• ANAH / Mon Accompagnateur Rénov' (national government program)flagshipGTM or Marketing PartnerOktave holds the official Mon Accompagnateur Rénov' accreditation granted by ANAA (Agence nationale de l'habitat), making it a mandatory intermediary for households seeking MaPrimeRénov' Parcours Accompagné since January 2024. This accreditation enables Oktave to deliver the full accompaniment journey required for major renovation subsidies.
• IMAEE (Accompanying organization)coreImplementation/ SI/ Consulting PartnerIMAEE (mentioned in Copropriété Victor Hugo project) is an AMO (Assistant à Maîtrise d'Ouvrage) partner that worked alongside Oktave to guide housing cooperatives through global renovation projects. IMAEE handled technical coordination while Oktave provided subsidy and financing support.
• Immobilière du RhinminorImplementation/ SI/ Consulting PartnerImmobilière du Rhin is a property management company (syndic) that partnered with Oktave on the Copropriété Saint Florent renovation project. The company's representative praised Oktave's role in preparing and facilitating owner meetings, navigating administrative procedures, and securing subsidies.
• ASTERIUM (web hosting provider)minorOthersASTERIUM, based in Mulhouse, is the web hosting provider for oktave.fr, operating on OVH dedicated servers.
• OVH (web hosting provider)minorOthersOVH, based in Roubaix, provides dedicated server hosting for oktave.fr as cited in the legal mentions.

Scale indicators8 records

Recent moves5 records

Expansion highlights4 records

Regional players

• PRRI (Pôle Régional de Ressources pour la Rénovation Energétique de l'habitat) — various regions: Network of regional resource centers supporting energy renovation professionals and homeowners in several French regions. Closely comparable to Oktave's regional mandate of mobilizing renovation activity through advisory and training, but without Oktave's end-customer accompaniment focus.
• Île-de-France Énergies (formerly ALEC IDF): Regional public-energy agency providing homeowners in Île-de-France with energy renovation advisory, audits, and subsidy accompaniment. Closely mirrors Oktave's SEM-style model and Mon Accompagnateur Rénov' accreditation but operates in a different geography.
• Energ'Y (formerly Pouget Énergies / group of regional SEMs): Grouping of regional SEM-style operators providing public-interest energy services including renovation accompaniment. Closely mirrors Oktave's SEM governance structure with regional/local authority backing, though operating in different French regions.

Direct peers

• Soliha: National federation of associations providing habitat renovation accompaniment, including energy retrofit guidance and subsidy assembly for low-income and vulnerable households. Directly comparable to Oktave in serving both individual owners and copropriétés with end-to-end project support, though with a stronger social-housing focus.
• Urbanis: Bureau d'études specializing in building energy renovation, urban planning, and habitat policy. Comparable to Oktave in delivering AMO (assistance à maîtrise d'ouvrage) services for copropriétés and individual owners, with similar technical and financial accompaniment capabilities.
• ALEC (Agence Locale de l'Énergie et du Climat) — local agencies network: Federation of local energy agencies across France delivering objective energy advice to homeowners and supporting local energy-transition policies. Directly comparable to Oktave in providing free, public-interest energy advisory and renovation guidance at a local/regional level.

Emerging players

• Hello Watt: Digital platform helping French consumers compare energy suppliers, install solar, and access renovation subsidies via a marketplace of vetted artisans. Overlaps with Oktave's online aid simulator and RGE-certified artisan network, though commercial/consumer-facing rather than public-service-oriented.
• Énergies Demain: Independent consultancy supporting territories and housing stakeholders on energy transition and renovation programs. Comparable to Oktave in advising on subsidy mobilization and energy retrofit strategy, though focused more on programmatic/strategic advisory than direct homeowner accompaniment.
• BBS Slama (Bureau d'études thermiques): Thermal engineering consultancy conducting energy audits, thermal studies, and renovation project design. Adjacent to Oktave's Audit Énergétique service, sharing the regulatory audit methodology for renovations but operating in a consulting/engineering capacity rather than as a public accompaniment service.

Broad incumbents

• France Rénov' (national network): France's national public service for energy renovation, consolidating the former FAIRE/Espace Info Énergie network. Directly comparable to Oktave in mission (guiding homeowners through renovation subsidies and works) but operating at national scale with state oversight rather than as a single regional SEM.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/oktaverenovation

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 Oktave