Stefe

What Stefe does

STEFE is a privately held Slovak heat energy group anchored by holding company STEFE SK, a.s. (founded 1995, headquartered in Banská Bystrica) and ultimately owned by Austrian energy group Energie Steiermark AG. The group operates centralized heat supply (CZT) systems across 19 Slovak cities and municipalities, delivering heat and hot water to more than 250,000 residential and commercial customers through a network of pipeline infrastructure exceeding 200 km, supported by 24/7 dispatching operations. STEFE's technology stack includes gas boilers, biomass-fired plants (in Banská Bystrica, Kremnica, Revúca, Rimavská Sobota, Rožňava, and Veľký Krtíš), cogeneration units (e.g., three units at Tepláreň Radvaň), heat pumps, and photovoltaic installations, with each customer building connected via compact heat transfer stations (KOST).

The group operates through eight major subsidiaries (STEFE Banská Bystrica, Martin, Zvolen, Rožňava, Rimavská Sobota, THS, ECB, and Trnava), each typically structured as a joint venture with the relevant municipality, alongside a minority stake in V.I.Trade s.r.o. (Nitra). Revenue streams span regulated heat supply (under URSO price oversight), electricity production from cogeneration, construction and reconstruction of boilers, ongoing operation/maintenance/meter management services, and customized cooling production for commercial customers. Go-to-market combines direct sales through regional subsidiaries with B2B professional services for municipalities, real estate developers (ESCO-style investment partnerships), building associations, and individual homeowners, supplemented by authorized service partnerships with Buderus, Protherm, Vaillant, Junkers, and Bosch. The group has invested more than EUR 170M (recently cited at EUR 200M) in modernization and operates with 51-100 employees across the holding entity.

Name

Stefe

Legal name

STEFE SK, a.s.

Website

https://stefe.sk

Company type

Private

Founded year

1995

Operating status

Operating

Headcount range

51–100 employees

Short description

STEFE is a Slovak privately held heat energy group operating centralized district heating systems that deliver heat, hot water, and cooling to 250,000+ residential and commercial customers across 19 Slovak cities, owned by Austrian energy company Energie Steiermark AG.

Ownership category

akta.pro rank

Product category

District Heating Services

NAICS

Steam and Air-Conditioning Supply (22133), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Power Boiler and Heat Exchanger Manufacturing (332410), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Plumbing, Heating, and Air-Conditioning Contractors (238220)

SIC

Heating Equipment, Except Electric & Warm Air Furnaces (3433), Cogeneration Services & Small Power Producers (4991), Natural Gas Transmisison & Distribution (4923)

akta.pro primary industry

Chillers, Boilers & Central Plant Operations (BPABACAG)

akta.pro secondary industries

HVAC Equipment (Heating, Cooling & Air Handling) (IMAHAKAB), Expansion Tank, Circulator Pump & Zone Valve Service (HSAOACAG), Heat Pump Repair & Maintenance (HSAOAHAD), Heat Exchangers, Coils & Hydronic HVAC Components (IMADANAF)

Keywords

• District heating supply
• Heat energy production
• Centralized heat supply
• Heating infrastructure services
• Boiler reconstruction services

Headquarters

HQ city

Banská Bystrica

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Heat Supply (Regulated): STEFE operates as a regulated heat supplier under URSO (Regulatory Office for Network Industries) oversight. Heat prices are determined by regulatory decisions and include costs for heat production, distribution, and supply. This is the primary revenue stream serving residential, commercial, and public sector customers.
2. Electricity Production: Through cogeneration units, STEFE produces and sells electricity to the distribution network. Electricity prices are also regulated by URSO.
3. Construction and Reconstruction Services: Professional reconstruction of boilers and heating systems, installation of new heat sources (gas boilers, biomass, heat pumps), and construction of heating infrastructure for developers and building owners.
4. Operation, Service and Maintenance: Ongoing maintenance and servicing of gas boilers and heating systems, including regular preventive maintenance, troubleshooting, and technical inspections. Also includes meter management services for water, heat, electricity, and gas.
5. Heat and Cold Production: Customized production and delivery of cooling for commercial and industrial customers based on individual needs, energy efficiency requirements, and environmental impact considerations.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

STEFE manufactures and supplies heat and cooling through centralized district heating networks (CZT) serving more than 250,000 people across 19 Slovak cities and municipalities. Its offering spans heat production (gas boilers, biomass, cogeneration, heat pumps), electricity production via CHP units, distribution through 200+ km of pipelines, custom energy solutions including boiler reconstruction, and ongoing operation/maintenance of heating systems and meters for residential, municipal, commercial, and industrial customers.

Product overview

Stefe is a heat energy group operating as a multi-subsidiary holding structure (STEFE SK as the parent) with a portfolio of five integrated service lines: (1) Teplo a chlad — central heat and cooling supply through CZT networks across 19 Slovak cities serving 250,000+ people; (2) Energetické riešenia — custom energy solutions including audits, system reconstruction, and efficiency upgrades; (3) Správa, prevádzka a údržba — operation, maintenance, and meter management for energy equipment; (4) Investičný partner — investment partnership covering heating/cooling/HVAC/electrical for construction projects; and (5) Výstavba — new build and modernization including heat pumps, cogeneration, and solar. The STEFE ECB subsidiary additionally operates over 200 km of heat pipelines. Supporting products include biomass boiler plants, cogeneration units (CHP), heat pumps, and photovoltaic panels deployed across subsidiary cities. The group also publishes an annual customer magazine, Teplo v meste.

Differentiator

Problem solved

Functional benefit

Products and services

• Teplo a chlad (Heat and Cooling Supply) Central heat supply (CZT) delivering heat and hot water to residential and commercial customers across 19 Slovak cities and municipalities, serving more than 250,000 people. Includes production and delivery of cooling based on individual customer needs.
• Energetické riešenia (Energy Solutions) Custom energy solutions including energy-technical assessment, proposal of measures, supplier selection, construction engineering, and implementation of energy efficiency measures such as energy equipment reconstruction, internal heat/hot water/air/gas distribution, and building energy improvements.
• Správa, prevádzka a údržba (Management, Operation and Maintenance) Comprehensive management, operation, and maintenance of energy equipment and meters including regular preventive maintenance, quality control, parameter setting, 24-hour readiness, and meter administration (replacement, electronic records, metrological inspection, billing).
• Investičný partner (Investment Partner) Investment partnership for developers and building owners covering heating, cooling, air conditioning, and electrical installations. STEFE assumes responsibility for this portion of project investments (typically 20%+ of total project investment), overseeing project implementation, assuming risks for oversized systems and providing billing services.
• Výstavba (Construction and Modernization) New building construction and modernization of existing buildings, including new heat or cooling production equipment and internal distribution systems. Offers innovative energy designs such as heat pumps, cogeneration, and photovoltaic or solar panels, with various contractual models available.
• Tepelná sieť (Heat Network Operations) Operation and modernization of heat pipeline networks (more than 200 km) across Slovakia through STEFE ECB, with continuous investment in pipeline infrastructure and 24/7 dispatching.
• Vykurovanie (Industrial and Commercial Heating Solutions) Heating solutions for industrial plants, schools, and commercial centers using biomass boilers with geographically Slovak-origin biomass, including project management, proper equipment sizing, and professional supervision.
• Tepelné straty (Heat Loss Solutions) Customized measures against unwanted heat losses using thermovision camera footage to develop precise analysis as the basis for thermal rehabilitation, substantially reducing heat consumption with investment costs potentially refinanced through heating savings.
• Electricity Production from Cogeneration Combined heat and power (CHP) units generating both electricity and heat, with electricity sold to the distribution network at URSO-regulated prices.

Quantifiable outcome

• Heat supply to 250,000+ people across 19 Slovak cities and municipalities
• +5 more outcomes

Named customers16 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Buderus (Bosch Group)coreOthersAuthorized service partner for Buderus boilers. STEFE Rožňava, STEFE THS, and STEFE Rimavská Sobota provide service, repairs, and maintenance for Buderus gas boilers up to 50 kW.
• Protherm (Ariston Group)coreOthersAuthorized service partner for Protherm boilers. Subsidiaries provide service, repairs, and maintenance for Protherm gas boilers up to 50 kW.
• VaillantcoreOthersAuthorized service partner for Vaillant boilers. Subsidiaries provide service, repairs, and maintenance for Vaillant gas boilers up to 50 kW.
• Junkers/BoschminorOthersAuthorized service partner for Junkers and Bosch boilers (both part of Bosch Group). Subsidiaries provide service and maintenance for these brands.
• Banskobystrický maratónminorGTM or Marketing PartnerLong-term partner of the Banská Bystrica Marathon, one of the most significant sporting events in the region. STEFE has been a consistent supporter, with 2026 marking another year of partnership.
• Banskobystrická latkaminorGTM or Marketing PartnerProud partner of the Banskobystrická latka athletics event in 2024 and 2026.
• Majstrovstvá Európy v atletike U18 2024minorGTM or Marketing PartnerSTEFE supported the European Athletics Championships U18 2024 held in Banská Bystrica.

Scale indicators12 records

Recent moves7 records

Expansion highlights6 records

Others

• Energie Steiermark AG: Energie Steiermark AG is the Austrian parent and controlling shareholder of STEFE SK and brings deep district heating, CHP and renewable energy capability. Although primarily a parent / capital partner rather than a Slovak market competitor, its group structure means its Austrian heat operations are highly comparable to STEFE's business model.

Direct peers

• Bytkomfort, s.r.o. (Prešov): Bytkomfort is a Slovak municipal housing and energy services company focused on apartment building management, including heat supply, meter management and heating system maintenance. It is a smaller-scale but directly comparable Slovak operator with overlapping service lines to STEFE.
• Veolia Energia Slovensko: Veolia Energia Slovensko (formerly Dalkia) is the largest district heating operator in Slovakia outside Bratislava and is the closest direct competitor to STEFE in the centralized heat supply market, operating gas- and biomass-fired CZT systems serving tens of thousands of residential and commercial customers.
• Bratislavská teplárenská, a.s. Bratislavská teplárenská is the dominant district heating supplier in Bratislava, producing and distributing heat from a mix of sources including combined heat and power. It is directly comparable to STEFE as a major Slovak CZT operator serving residential, commercial and municipal customers under regulated tariffs.
• Tepláreň Košice, a.s. Tepláreň Košice supplies heat to the city of Košice and surrounding areas from a large central heat source, including cogeneration, mirroring STEFE's regional CZT-plus-CHP model under Slovak regulatory oversight by URSO.

Broad incumbents

• E.ON Connecting Energies (Hungary): E.ON's Hungarian arm sells district heating and related energy services to municipal and residential customers, including biomass conversions and heat pump integration. Adjacent to STEFE on geography and customer type, with E.ON adding the global utility balance sheet and innovation roadmap.
• Veolia Group / Dalkia (Heat Operations): Dalkia (the Veolia Group's district heating arm) is the largest pan-European district heating operator and a broad incumbent reference set for STEFE. It operates hundreds of CZT networks across France, Central Europe and beyond, and validates the asset-heavy, regulated, multi-tech operating model STEFE runs in Slovakia.
• ENGIE Solutions (Central Europe): ENGIE operates district heating and cooling networks across Central Europe alongside a broader energy and services portfolio. Comparable to STEFE on the CZT plus energy services model, with a much broader geographic and product footprint and substantially larger resources.

Regional players

• Pražská teplárenská a.s. Pražská teplárenská is one of the largest district heating operators in the Czech Republic, producing and distributing heat to Prague via large-scale central plants including CHP. It is comparable to STEFE on business model and asset profile, though it operates in a different (Czech) regulatory geography.
• MVV Energie CZ a.s. MVV Energie CZ operates district heating and related energy services across multiple Czech cities with a portfolio that includes biomass, CHP and heat networks. The asset mix and integrated heat-and-services model closely parallel STEFE's Slovak operations, although the geographic footprint lies in the Czech Republic.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Subsidiaries9 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 Stefe