Isotop
Isotop France is a privately held residential energy renovation contractor that installs thermal insulation, heat pumps, thermodynamic water heaters, and ventilation systems for French homeowners, landlords, and condominiums, leveraging RGE certification to enable customer access to government subsidies.
- Company typePrivate
- Founded-
- HeadquartersLevallois-perret, France
- Headcount11–50
- GTM typeB2C
- OfferingServices
What Isotop does
Isotop France is a privately held French residential energy renovation contractor headquartered in Nanterre, with regional offices in Gélacourt and Décines-Charpieu. The company provides exterior thermal insulation (ITE), interior thermal insulation (ITI), attic and roof insulation (blown or rolled), air-water and air-air heat pumps, thermodynamic water heaters, and single- and double-flow mechanical ventilation (VMC) systems. Its service portfolio is enabled by RGE (Reconnu Garant de l'Environnement) certification, which allows customers to access French government subsidy programs including MaPrimeRénov', CEE certificates, reduced 5.5% VAT, and the Coup de pouce bonus. Core technology consists of conventional thermal insulation panels and render/cladding systems, heat pump units that extract calories from ambient or exterior air, thermodynamic water heaters consuming up to 3x less energy than traditional electric units, and VMC double-flow systems with heat recovery exchangers.
The company's business model is direct-to-consumer professional services, targeting residential property owners (primary), landlords, and condominium associations. ISOTOP acquires customers through its website, free quote requests, and a referral program, then deploys a field sales force of approximately 13 commercial representatives who visit properties, perform assessments, and guide projects through completion, including subsidy application support. Revenue is generated through one-time project-based installations priced per square meter (insulation) or per system (heat pumps, VMC), with project values ranging from roughly €600 for a basic VMC to over €8,000 for double-flow VMC and substantially higher for full multi-work renovations. The company has completed over 250 projects over 7+ years and maintains 136 verified Google reviews, positioning itself in a fragmented residential renovation market that benefits from France's regulatory push toward energy efficiency.
Isotop firmographics
Firmographics- Name
- Isotop
- Legal name
- ISOTOP FRANCE
- Website
- https://isotopfrance.fr
- Company type
- Private
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Isotop France is a privately held residential energy renovation contractor that installs thermal insulation, heat pumps, thermodynamic water heaters, and ventilation systems for French homeowners, landlords, and condominiums, leveraging RGE certification to enable customer access to government subsidies.
- Ownership category
- akta.pro rank
Isotop industry classification
Industry- Product category
- Home Energy Renovation Services
- NAICS
- Plumbing, Heating, and Air-Conditioning Contractors (23822), Drywall and Insulation Contractors (238310)
- SIC
- Auto Controls For Regulating Residential & Comml Environments (3822)
- akta.pro primary industry
- Energy Efficiency & Weatherization Retrofit (HSAPAEAF)
- akta.pro secondary industries
- Residential HVAC System Installation (Furnace/AC/Heat Pump) (HSAOAGAA), HVAC Installation, Service & Repair (IMAIABAA)
Keywords
Where Isotop is headquartered
LocationHeadquarters
- HQ city
- Levallois-perret
- HQ country
- France
- HQ region
- Europe
Offices3 records
Markets served
Isotop business model
Business model- GTM type
- B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Supply Chain, Marketing or Sales, Others
Revenue model
- Energy Renovation Installation Services: ISOTOP generates revenue through the installation of energy renovation solutions including thermal insulation (exterior and interior), heat pumps, thermodynamic water heaters, and ventilation systems. Revenue is primarily one-time project-based for individual homeowners, with services priced per square meter for insulation work and as complete system installations for heat pumps and VMC.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | Interior Thermal Insulation (ITI): €40-80 per m² |
| Unit Pricing | Pay-as-you-go | External Thermal Insulation under render: €180-250 per m² |
| Unit Pricing | Pay-as-you-go | External Thermal Insulation under ventilated cladding: €220-340 per m² |
| Unit Pricing | Pay-as-you-go | Simple Flow VMC: €600-1,500 installed |
| Unit Pricing | Pay-as-you-go | Double Flow VMC: €3,000-8,000 installed |
Go-to-market motion1 record
Distribution channels2 records
Marketing channels5 records
Isotop product offering
Product offeringCore offering
Isotop (ISOTOP FRANCE) installs residential energy renovation solutions for French homeowners, including exterior and interior thermal insulation, attic and roof insulation, blown and rolled insulation, air-to-water and air-to-air heat pumps, thermodynamic water heaters, and single-flow and double-flow mechanical ventilation systems. The company guides customers through French subsidy applications (MaPrimeRénov', CEE, reduced VAT) and bills customers per square meter for insulation or as complete installations for heating and ventilation systems.
Product overview
ISOTOP France is a home energy renovation company offering a comprehensive portfolio of thermal insulation, heating, and ventilation solutions. The core offering consists of exterior thermal insulation (ITE) and interior thermal insulation (ITI) services, complemented by attic and roof insulation (Combles & Rampants) available in blown or roll-out formats. For heating, the company installs air-water and air-air heat pumps (PAC), as well as thermodynamic water heaters (Ballon Thermodynamique). Ventilation solutions include single-flow and double-flow mechanical ventilation (VMC). ISOTOP provides end-to-end project management including assistance with financial aid programs (MaPrimeRénov', CEE, reduced VAT) to help homeowners finance their energy renovations.
Differentiator
Problem solved
Functional benefit
Products and services
- External Thermal Insulation (ITE) Exterior thermal insulation installation for residential walls using panels covered with render or ventilated cladding. Eliminates thermal bridges and reduces heating bills by up to 25%. Offered in two variants: under render (€180-250/m²) and under ventilated cladding (€220-340/m²). Aimed at French homeowners seeking energy performance improvements.
- Internal Thermal Insulation (ITI) Interior wall insulation installation using metal frame with drywall finishing or bonded composite panels, with materials such as glass wool, rock wool, or bio-based insulation. Priced €40-80/m² depending on surface area, materials, and complexity. For French homeowners seeking interior renovation with thermal performance gains.
- Attic and Roof Slope Insulation Insulation of lofts and roof slopes using blown or panel/roll techniques. Addresses the ~30% of heat loss attributable to poorly insulated roofs and can reduce heating costs by 30-40%. For French homeowners targeting the largest source of residential heat loss.
- Air-to-Water Heat Pump Heat pump installation that extracts calories from outside air to heat water for central heating (radiators or underfloor heating) and domestic hot water. Eligible for MaPrimeRénov' subsidies up to €5,000. For French homeowners replacing inefficient heating systems.
- Air-to-Air Heat Pump Reversible air-to-air heat pump (air conditioning) capturing outdoor heat and distributing it indoors via indoor units. Provides heating in winter and cooling in summer. Not eligible for MaPrimeRénov'. For French homeowners seeking year-round climate control.
- Thermodynamic Water Heater (Ballon Thermodynamique) Heat-pump water heater that captures calories from ambient, exterior, or extracted air to produce sanitary hot water. Consumes up to 3 times less energy than traditional electric water heaters. For French homeowners replacing inefficient electric hot water tanks.
- Single-Flow Mechanical Ventilation (VMC Simple Flux) Mechanical ventilation system extracting stale air from wet rooms (kitchen, bathroom, WC) to the outside, creating depression that draws fresh air through inlets. Includes autoréglable and hygrovéglable variants. Priced €600-1,500 installed. For French homeowners addressing indoor air quality and humidity.
- Double-Flow Mechanical Ventilation (VMC Double Flux) Mechanical ventilation extracting stale air while insufflating filtered fresh air pre-heated through a heat exchanger for energy recovery. Priced €3,000-8,000 installed depending on system and dwelling specifics. For French homeowners addressing heat-loss ventilation efficiency.
- Government Subsidy Assistance (MaPrimeRénov', CEE, Reduced VAT) Administrative service bundled with installation work: helping French homeowners identify eligibility, file applications, and complete paperwork for MaPrimeRénov', Certificats d'Économie d'Énergie (CEE), the reduced 5.5% VAT rate on energy performance work, and the Coup de pouce Chauffage bonus. For homeowners seeking to reduce out-of-pocket renovation cost through public aid.
Companies that use Isotop
Customer profileNamed customers6 records
Segments3 records
Ideal customer profiles3 records
Isotop technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Isotop partnerships and signals
Strategic signalScale indicators4 records
Recent moves6 records
Expansion highlights5 records
Isotop competitors and assessment
Company assessmentBroad incumbents
- IZI by EDF: EDF subsidiary delivering residential insulation, heat pump, ventilation, and EV charging installations with strong subsidy support. Overlaps directly with ISOTOP's core services, but competes from a utility-backed platform with national marketing reach.
- ENGIE Home Services: ENGIE's residential service arm providing heating, insulation, and energy renovation work with extensive national coverage. Comparable installation services, but with a much broader portfolio and brand recognition ISOTOP cannot match.
Regional players
- Oktave: Regional energy renovation platform focused on Auvergne-Rhône-Alpes, delivering insulation and heat pump upgrades with subsidy guidance. Comparable service mix to ISOTOP, but operationally concentrated in one region where ISOTOP has only a single office.
Direct peers
- Hellio: Major French energy renovation specialist (formerly PrimesEnergie) helping homeowners access CEE, MaPrimeRénov', and other aid programs. Closely mirrors ISOTOP's insulation, heating, and ventilation offerings plus subsidy-concierge model, with broader national reach and B2B program management.
- Quelle Énergie: French energy renovation advisory and installation platform offering insulation, heat pumps, ventilation, and solar with subsidy support. Comparable proposition to ISOTOP, including similar RGE-led sales motion and one-stop-shop positioning across energy works.
- Effy: France's largest independent residential energy renovation specialist, offering insulation, heat pumps, and other RGE-certified works with subsidy assistance. Directly comparable to ISOTOP in customer profile, service mix, and subsidy-led GTM, but operating at significantly larger national scale.
- Avenir Rénovations: Leading French home renovation franchise network executing insulation, heating, and energy-efficiency upgrades nationwide. Comparable customer base and service scope to ISOTOP, with a franchise-driven model that gives it national density ISOTOP currently lacks.
- Dorémi: French cooperative specializing in comprehensive home energy renovation (BBC-level retrofit). Comparable to ISOTOP on whole-home energy retrofit scope and customer segment, with a more integrated project-management and post-works follow-up approach.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
Isotop social profiles
Digital presenceIsotop compliance and trust
Trust signalCompliance1 record
Isotop financial estimates
Financial estimateRevenue estimate
Valuation estimate
Isotop leadership team
Management profileNumber of profiles
Profiles6 records
Isotop funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Isotop 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 Isotop
What does Isotop do?
Isotop (ISOTOP FRANCE) installs residential energy renovation solutions for French homeowners, including exterior and interior thermal insulation, attic and roof insulation, blown and rolled insulation, air-to-water and air-to-air heat pumps, thermodynamic water heaters, and single-flow and double-flow mechanical ventilation systems. The company guides customers through French subsidy applications (MaPrimeRénov', CEE, reduced VAT) and bills customers per square meter for insulation or as complete installations for heating and ventilation systems.
Is Isotop a public or private company?
Isotop is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Isotop founded?
Isotop was founded in -1. It employs 11 to 50 people.
Where is Isotop based?
Isotop is headquartered in Levallois-perret, France, in the Europe region.
How does Isotop make money?
One revenue line is on record: energy Renovation Installation Services.
Who are Isotop's main competitors?
Broad incumbents on record are IZI by EDF and ENGIE Home Services. Oktave is listed as a regional player. Direct peers are Hellio, Quelle Énergie, Effy, Avenir Rénovations and Dorémi.
Does Isotop have an API?
No public API is recorded for Isotop.
What industry is Isotop in?
Isotop's product category is Home Energy Renovation Services. Its primary akta.pro industry code is HSAPAEAF, Energy Efficiency & Weatherization Retrofit, with a secondary code of HSAOAGAA, Residential HVAC System Installation (Furnace/AC/Heat Pump). Its NAICS code is 23822 and its SIC code is 3822.