What Walterre does

Walterre is a French energy-services company that provides HVAC (heating, ventilation, and air conditioning) performance diagnostics, exploitation assistance, and a proprietary monitoring platform to building managers, social landlords, and co-ownership syndicates. Founded in 2019 and headquartered in Lyon (with a secondary office in Chambéry), the company addresses the observation that approximately 99% of HVAC installations are oversized or poorly optimized, causing around 12% excess energy consumption. Its offering is built on two pillars: the AMEx® (Assistant à Maîtrise d'Exploitation) methodology, a codified service framework with four phases — Diagnostic, Suivi, Transformation, and Formation — and WaltApp®, a SaaS platform for centralized tracking of installation performance and consumption across building portfolios.

The company has expertised over 4.3 million square meters of building floor area, claims average energy savings of 19.6% (up to 40% potential) on monitored buildings, and reports 12,965 tonnes of CO2 avoided. Revenue is generated through professional diagnostic services and recurring multi-year contracts for ongoing monitoring, annual management reports, and WaltApp® access. Pricing is quote-based and not publicly disclosed. The team of 12 includes three co-founders (Maxence as CEO, Tony as President, Jules as CTO), four technical experts, an R&D manager, a PhD data scientist, a fullstack developer, a commercial director, an AMEx manager, and an administrative lead. Walterre is privately held, with no disclosed funding rounds, and operates exclusively in the Auvergne-Rhône-Alpes region of France.

The go-to-market is sales-led with on-site expert presence as the primary distribution channel. Initial contact typically enters via the website contact form, followed by expert field visits for diagnostic and monitoring engagements. Distribution is supported by a regional partner network including Bpifrance, Région Auvergne-Rhône-Alpes, Réseau Entreprendre Rhône (where Walterre is a Lauréat), Impulse Partners, Cluster Eco Bât, French PropTech, and ASDER (ALEC de Chambéry), the latter co-developing training modules. Customers span social housing (Epinal Habitat, 2,900 units), property management (Nexity, Pichet), education, healthcare, nonprofit, and government segments, with a 4.5/5 satisfaction rating across 39 client reviews.

Name

Walterre

Legal name

Walterre

Website

https://walterre.fr

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

1–10 employees

Short description

Walterre is a French energy-services company providing HVAC performance diagnostics, ongoing monitoring, and decarbonization advisory to building managers, social landlords, and co-ownership syndicates, delivered through its proprietary AMEx® methodology and WaltApp® SaaS platform across the Auvergne-Rhône-Alpes region.

Ownership category

akta.pro rank

Product category

Building Energy Management Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (23822)

SIC

Auto Controls For Regulating Residential & Comml Environments (3822)

akta.pro primary industry

HVAC Controls & Optimization (Smart Thermostats, VAV, Chillers/Boilers Controls) (BPABAGAB)

akta.pro secondary industry

Commercial HVAC Maintenance Agreements & PM Programs (HSAOAHAJ)

Keywords

• HVAC performance diagnostics
• Building energy optimization
• Energy exploitation assistance
• Building monitoring software
• Decarbonation consulting

Headquarters

HQ city

Lyon

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. Diagnostic Services: Technical expertise services for analyzing HVAC installations, identifying optimization opportunities, and defining actionable improvement plans. One-time engagement per building or portfolio.
2. Ongoing Monitoring & Support: Regular field expert visits, consumption tracking, annual management reports, and continuous improvement guidance. Multi-year contracts with recurring engagement.
3. WaltApp® Platform Access: Software platform access for building monitoring and performance tracking, available as part of monitoring services or standalone.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Walterre provides HVAC (heating, ventilation, and air conditioning) performance diagnostics, exploitation assistance, and proprietary software (WaltApp®) to reduce building energy consumption. The company uses its AMEx® (Assistant à Maîtrise d'Exploitation) methodology across four service pillars — Diagnostic, Suivi (monitoring), Transformation (decarbonation), and Formation (training) — to help building managers, social landlords, and co-ownership syndicates reduce HVAC energy consumption by up to 40%.

Product overview

Walterre offers a platform-plus-methodology approach centered on two core offerings: AMEx® (Assistant à Maîtrise d'Exploitation), their proprietary operational management methodology for HVAC (heating, ventilation, and air conditioning) systems, and WaltApp®, their digital software platform for real-time monitoring and piloting. The AMEx® methodology encompasses four service pillars — Diagnostic (identifying and understanding installation performance), Suivi (ongoing monitoring and improvement), Transformation (decarbonation project prioritization and execution), and Formation (training for operational staff). WaltApp® serves as the digital interface that complements these services, enabling centralized tracking and management of installation performance. Together, these products enable building managers, social landlords, and property co-owners to reduce energy consumption by up to 40%.

Differentiator

Problem solved

Functional benefit

Brands

• WaltApp®: Proprietary software platform for monitoring building performance, tracking progress of energy optimization projects, and centralized management of installation portfolios.

Products and services

• WaltApp® Proprietary software platform for monitoring and piloting HVAC installations, enabling users to track progress, manage their installation or portfolio, and access real-time performance data. Used by building managers, social landlords, and co-owners to centralize tracking of energy optimization projects.
• AMEx® Diagnostic Service On-site technical assessment of HVAC installations delivered by Walterre experts, identifying and understanding installation performance, defining a directly actionable progress plan, and identifying energy savings opportunities of up to 40%.
• AMEx® Suivi (Ongoing Monitoring) Recurring multi-year monitoring service providing regular field expert visits, consumption tracking, annual management reports, and ongoing optimization guidance, with access to the WaltApp® platform for centralized tracking of installation performance.
• AMEx® Transformation Service Decarbonation advisory and project support service, prioritizing transformation solutions (wood, aerothermal, geothermal, hybridization, solar thermal) for buildings or portfolios, conducting feasibility studies, drafting consultation documents, and overseeing works delivery and performance verification.
• AMEx® Formation (Training) Training program delivered in partnership with ASDER (ALEC de Chambéry) to teach AMEx® exploitation monitoring to facility managers, AMO staff, and internal technical teams, enabling competency transfer to client organizations.

Quantifiable outcome

• Up to 40% energy consumption reduction achievable through diagnostic and optimization
• +5 more outcomes

Named customers10 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Five partnerships are on record, tiered core and supporting.

• Région Auvergne-Rhône-AlpescoreStrategic or Co-development PartnerRegional government authority in France supporting regional economic development. Partnership indicates regional support for Walterre's energy efficiency mission and potentially provides access to regional programs and clients.
• Impulse PartnerssupportingStrategic or Co-development PartnerAcceleration program and ecosystem for proptech and building technology companies. Partnership suggests access to mentorship, network, and potential client introductions.
• Cluster Eco BâtsupportingStrategic or Co-development PartnerBuilding cluster focused on eco-construction and energy efficiency. Partnership positions Walterre within the green building ecosystem and provides networking opportunities.
• ProptechsupportingStrategic or Co-development PartnerFrench proptech association (French PropTech). Membership provides access to industry network, events, and visibility within the property technology ecosystem.
• ASDER (ALEC de Chambéry)coreImplementation/ SI/ Consulting PartnerLocal energy advice agency and training provider. Co-development of training modules for exploitation monitoring (AMEx®) delivered to building agents, facility managers, and technical teams. Partnership enables competency transfer to client organizations.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Ubigreen: French building energy-performance SaaS focused on collecting, analyzing, and optimizing consumption across multi-site portfolios. Closely mirrors Walterre's building-focused energy-intelligence proposition with similar target buyers.
• Deepki: French proptech SaaS for building ESG and energy performance analytics across real-estate portfolios. Comparable to Walterre in targeting property managers and landlords with data-driven energy optimization, though positioned at a larger SaaS scale.
• Smart Impulse: French energy intelligence provider using non-intrusive metering to monitor and optimize building electricity consumption. Comparable to Walterre in delivering measurable energy savings for tertiary and residential portfolios.
• Energisme: French SaaS platform for building energy intelligence and multi-site consumption management. Comparable to Walterre in serving facility managers and property owners with software-driven energy optimization across portfolios.

Broad incumbents

• Honeywell Forge: Honeywell's enterprise smart-building platform combining BMS, energy optimization, and analytics. Competes in the same building-performance space as Walterre but addresses it from a global incumbent position with embedded controls and software.
• Johnson Controls (OpenBlue): Global building technology provider offering OpenBlue digital platform and HVAC services. Comparable to Walterre's HVAC performance optimization focus, but as part of a much larger controls, services, and equipment portfolio.
• Schneider Electric (EcoStruxure): Global industrial leader offering EcoStruxure, a broad smart-building platform including HVAC controls, energy management, and building automation. Comparable to Walterre's optimization mission but as part of a much wider hardware-and-software portfolio.
• Vertuoz (ENGIE Solutions): ENGIE subsidiary specializing in HVAC and energy optimization for buildings and tertiary sites. Overlaps directly with Walterre's HVAC exploitation services but operates with the scale, geographic reach, and capital of a major French energy group.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/walterre

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

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 Walterre