Gossi AG

What Gossi AG does

Gössi AG is a Swiss family-owned engineering company headquartered in Küssnacht am Rigi that designs, manufactures, installs, and services proprietary systems for legionella-safe and energy-efficient hot water distribution. The company positions itself as the market-leading specialist in Switzerland for this niche, serving hospitals, senior care facilities, hotels, sports and educational facilities, and multi-family residential buildings. Its core technology stack combines the registered Gössi-Mat fully automatic mixing water system (a Gold Medal winner at the Geneva International Inventors' Fair), temperature-stratification stainless-steel storage tanks manufactured in-house, the Legio-Protect Compact Lade-System 2000 with ±1°C stratification accuracy, a BLV-approved copper-silver ionization system, and the SVGW-certified Argonit physical limescale treatment system. Adjacent offerings include basement dehumidification via the Duplex heat-pump system and exclusive Swiss distribution of T-Safe medical water filtration products from Denmark. Gössi AG sells directly to enterprise and institutional customers in Switzerland, offering free non-binding hot water concept proposals, custom engineering, on-site installation and commissioning, boiler descaling, sanitary installation, and maintenance services, supplemented by training courses for building technology professionals on legionella prevention and energy-efficient system design. Revenue is generated through one-time hardware sales and recurring professional services, with regulatory approvals (SVGW, TBDV/BLV) serving as key procurement criteria for Swiss institutional buyers.

Name

Gossi AG

Legal name

Gössi AG

Website

https://goessi.ch

Company type

Private

Founded year

1937

Operating status

Operating

Headcount range

11–50 employees

Short description

Gössi AG is a Swiss family-owned specialist that designs, manufactures, and installs proprietary legionella-safe and energy-efficient hot water systems, serving Swiss hospitals, care homes, hotels, sports facilities, and residential buildings with custom-engineered hardware and on-site services.

Ownership category

akta.pro rank

Product category

Water Heating and Treatment Equipment

NAICS

Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430)

akta.pro primary industry

Disinfection & Remedial Works (Chlorination, Thermal, Shock Treatments) (BPABAJAF)

akta.pro secondary industries

Pipework, Calorifier & Heat Exchanger Descaling/Decontamination (BPABAJAI), Monitoring & Control (Dosing Systems, Remote Monitoring, Sensors) (BPABAJAK), Water Softener, Filtration & Treatment System Installation (HSAOAAAH), Water Systems & Treatment (Pumps/Boilers/Water Heaters/Filtration) (IMAIABAK)

Keywords

• Legionella prevention systems
• Hot water systems
• Water treatment equipment
• Temperature stratification storage
• Plumbing installations

Headquarters

HQ city

Kussnacht Am Rigi

HQ country

Switzerland

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hot Water System Products: Sale of proprietary legionella-safe hot water systems including Gössi-Mat, temperature stratification storage tanks, ionization systems, and charging stations. Products are custom-designed and manufactured to customer specifications.
2. Physical Water Treatment Products: Sale of Argonit physical limescale treatment systems with SVGW certification for residential and commercial applications.
3. Medical Water Filtration Products: Exclusive Swiss distribution of T-Safe medical water filtration products including faucet filters, shower filters, and hygiene shower systems for legionella and pathogen protection.
4. Installation and Service: Sanitary installation services, boiler descaling, and maintenance services for hot water and sanitary systems.
5. Training and Education: Educational courses on legionella prevention, hot water system planning, and energy-efficient system design for building technology professionals.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

G\u00f6ssi AG manufactures and installs energy-efficient, legionella-safe hot water systems and components for buildings. The product portfolio includes the G\u00f6ssi-Mat automatic mixing system, copper-silver ionization systems, custom stainless steel temperature stratification storage tanks, the Legio-Protect charging station, the Argonit physical limescale treatment system, Duplex heating/dehumidifiers, and T-Safe medical water filtration products (exclusively distributed in Switzerland). The company also provides sanitary installation, boiler descaling, maintenance, and training services.

Product overview

Gössi AG is a leading specialist in energy-efficient and legionella-safe hot water solutions based in Küssnacht am Rigi, Switzerland. The company offers a comprehensive portfolio of hardware products centered on legionella prevention and hot water system management. The core portfolio includes: the Gössi-Mat fully automatic mixed-water system (gold medal winner) for legionella control at lower temperatures; the Gössi Ionization System for copper-silver ionization-based preventive protection; temperature stratification storage tanks (WW-Speicher) in stainless steel; the Legio-Protect Compact Lade-System 2000 for precise temperature management; and the Duplex heating/dehumidifier for mold prevention. A complementary chemical-free scale treatment is available through the Argonit system. Additionally, Gössi AG serves as the exclusive Swiss distributor of T-Safe medical water filtration products (sub-brand), including tap filters, shower filters, and panel shower systems for healthcare and commercial environments. Services include boiler descaling, sanitary installations, and maintenance/repair work.

Differentiator

Problem solved

Functional benefit

Products and services

• G\u00f6ssi-Mat Mischwasseranlage

Quantifiable outcome

• 50% reduction in circulation losses
• +4 more outcomes

Named customers14 records

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• Tandrup (T-Safe)coreChannel Partner/ Reseller/ DistributorGössi AG is the exclusive Swiss distribution partner for Danish family company Tandrup's T-Safe medical water filtration products. Tandrup is a family business led by father and son in its second and third generation, specializing in sanitary products and drinking water safety products. T-Safe products include medical water faucet filters, shower filters, and hygiene shower systems for legionella and pathogen protection.

Scale indicators2 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• BWT AG (Best Water Technology): Austrian-headquartered European leader in water technologies including legionella prevention, softening, and point-of-use filters; overlaps Gössi in commercial/building water hygiene with a much broader portfolio and geographic reach.
• CWS Group (formerly CWS-boco): European hygiene and water services provider offering water-saving, hygiene, and legionella-related solutions to commercial customers including healthcare and hospitality — comparable customer verticals and recurring-service model.
• Watts Water Technologies: US-listed global manufacturer of water safety and flow products including hot water system components, mixing valves, and legionella-control equipment serving building services and OEM customers.
• Honeywell International (Water & Building Solutions): Global industrial conglomerate with a building water portfolio including legionella control valves and treatment systems; competes indirectly through scale, certification, and integrated building management offerings.

Emerging players

• Elga LabWater (Veolia): Specialist in pure and ultrapure water systems for laboratories and healthcare; partial overlap with Gössi's medical water filtration use cases in hospitals and clinical settings.

Direct peers

• Grünbeck Wasseraufbereitung: German family-owned water treatment specialist offering legionella prevention systems, softening, and filtration for residential and commercial buildings — directly comparable product mix and customer base to Gössi AG.
• Caleffi S.p.A. Italian manufacturer of hydronic components, mixing valves, and stratified storage solutions for hot water systems — directly comparable in functional technology and building-services customer base.
• Tandrup (T-Safe): Danish family-owned manufacturer of medical water filtration products (T-Safe brand). Gössi is T-Safe's exclusive Swiss distribution partner, so the two are commercially intertwined and target the same legionella/pathogen prevention use cases.
• JUDO Wasseraufbereitung GmbH: German specialist in building water treatment including softening, filtration, and legionella protection systems for hotels, hospitals, and residential complexes — a close functional peer in the DACH region.
• Reflex Winkelmann GmbH: German specialist in hot water storage tanks, stratification systems, and hydraulic separators for commercial and residential heating — overlaps Gössi's WW-Speicher and Ladestation product lines.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance2 records

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 Gossi AG