Knaack & Jahn Schiffbau GmbH

What Knaack & Jahn Schiffbau GmbH does

Knaack & Jahn Schiffbau GmbH is a Hamburg-based, privately held German marine services company operating under the KJ Marine Systems brand, with a 15-person headcount. Its core commercial asset is the proprietary KJ FireOff® marine fire protection system, which uses uniquely developed nozzles to protect accommodations, public spaces, engine rooms, and other protected areas on yachts, cruise ships, ferries, and other vessel types. The company differentiates KJ FireOff® on claimed 40% lower energy consumption versus competitive systems, no water additives, weight savings, easier installation, and aesthetic integration options (rosettes and covers in chrome, gold, and RAL colors, including a side-wall-only configuration).

The business model is project-based and B2B, combining hardware sales of the KJ FireOff® system with professional ship repair services across piping, steel construction, and HVACR. KJ FireOff® is sold as a total turnkey package that bundles engineering, classification society approval, delivery, assembly, commissioning, and formal handover to the classification society and the shipowner. Pricing is quote-based and contracted on a multi-year basis, reflecting the long sales cycles and integration points typical of newbuild and refit marine projects.

Go-to-market is enterprise field sales targeting shipbuilders, ship owners, and cruise/ferry operators, supported by direct contact channels, the kj-marinesystems.com and kj-fireoff.com websites, and SMM trade show participation. The company presents a global reach claim while operating from a single Hamburg headquarters, and the customer base is concentrated in three primary verticals: yachts, cruise ships, and ferries. There is no disclosed parent company, no external funding, and no M&A activity, indicating an owner-operated, organically funded business.

Name

Knaack & Jahn Schiffbau GmbH

Legal name

Knaack & Jahn Schiffbau GmbH

Website

https://kj-fireoff.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Knaack & Jahn Schiffbau GmbH is a Hamburg-based marine services firm that sells the proprietary KJ FireOff® fire protection system and offers piping, steel construction, and HVACR services to yacht, cruise, and ferry builders and operators worldwide.

Ownership category

akta.pro rank

Product category

Marine Fire Protection Systems

akta.pro primary industry

Safety, Fire Protection & Emergency Systems (Firewater, Gas Detection, Rescue) (IMAJALAL)

akta.pro secondary industry

Fire Protection Systems Contracting (Sprinklers, Alarms, Suppression) (IMAFALAD)

Keywords

• Marine fire protection
• Ship repair services
• Marine HVACR systems
• Marine steel construction
• Marine pipe systems

Headquarters

HQ city

Hamburg

HQ country

Germany

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, Others

Revenue model

1. Fire Protection Systems (KJ FireOff®): Sale and installation of proprietary fire protection systems including engineering, classification society approval, delivery, assembly, commissioning, and handover to classification society and shipping company.
2. Marine Ship Repair Services: Ship repair services including pipeline systems, steel construction, and HVACR services for marine vessels.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Knaack & Jahn Schiffbau GmbH develops, manufactures, and installs the proprietary KJ FireOff® fire protection system featuring uniquely developed nozzles for yachts, cruise ships, ferries, and other marine vessels. The company also delivers ship repair and modification services including pipe systems (Rohrleitungssysteme), steel construction (Stahlbau), and HVACR, offering turnkey fire protection packages covering engineering, classification society approval, delivery, assembly, commissioning, and handover.

Product overview

Knaack & Jahn Schiffbau GmbH is a marine systems company offering a portfolio of ship repair and modification services. The core offering centers on the proprietary KJ FireOff® fire protection system with specially developed nozzles, complemented by pipe systems (Rohrleitungssysteme), steel construction (Stahlbau), and HVACR services. The company provides complete turnkey fire protection packages including engineering, classification society approval, supply, installation, commissioning, and handover. KJ FireOff® serves accommodations, public spaces, engine rooms, and protected areas on yachts, cruise ships, ferries, and other vessel types, distinguishing itself through 40% lower energy consumption and aesthetic installation options.

Differentiator

Problem solved

Functional benefit

Brands

• KJ FireOff®: Fire protection system with unique nozzle technology developed for fire protection of accommodations, public spaces, engine rooms, and all protected areas on yachts, cruise ships, ferries and other ship types. Offers 40% lower energy consumption compared to competitive systems and no water additives required.

Products and services

• KJ FireOff® Fire Protection System Proprietary fire protection system with uniquely developed nozzles designed for accommodations, public spaces, engine rooms, and all protected areas on yachts, cruise ships, ferries, and other vessel types. Features 40% lower energy consumption than competitive systems, requires no water additives, offers easier installation and simpler crew maintenance, and provides aesthetic rosettes and covers in chrome, gold, and all RAL colors.
• Rohrleitungssysteme (Pipe Systems)
• Stahlbau (Steel Construction) Steel construction services for ship repair, modification, and outfitting work on marine vessels, delivered to ship owners, operators, and shipyards.
• HVACR Services Heating, ventilation, air conditioning, and refrigeration installation, maintenance, and repair services for marine vessels, provided to ship owners, operators, and shipyards.
• Fire Protection Total Package Complete turnkey fire protection package delivered from a single source, including engineering, classification society approval, delivery, assembly, commissioning, and handover to the classification society and shipping company. Built around the proprietary KJ FireOff® system.

Quantifiable outcome

• 40% lower energy consumption compared to competitive fire protection systems
• +3 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators1 record

Recent moves5 records

Expansion highlights4 records

Direct peers

• Marioff: Finland-based pioneer of HI-FOG water mist fire protection, the leading marine fire suppression supplier to cruise ships, ferries, and offshore vessels — directly comparable to KJ FireOff® in product category and customer base.
• VIKING Life-Saving Equipment: Danish marine safety equipment manufacturer supplying fire protection, lifeboats, and evacuation systems to cruise and commercial shipping — overlapping in marine fire protection market and end customers.
• Survitec: Global marine safety and survival solutions provider including fire protection systems for cruise, commercial, and offshore vessels — comparable as a one-stop marine safety vendor targeting similar shipowner customers.
• Consilium: Swedish provider of marine safety, navigation, and fire detection systems serving shipowners and shipyards globally — overlapping customer base in marine fire safety with KJ's KJ FireOff® offering.

Broad incumbents

• Wärtsilä: Major marine systems integrator providing ship power, propulsion, and automation including integrated safety systems — operates in marine fire/safety as part of a broader vessel systems portfolio serving the same shipbuilders and shipowners.
• Kidde (Carrier): Large diversified fire protection brand under Carrier with marine-adjacent suppression products — competes broadly in fire protection including shipping and offshore applications.
• Minimax: Hamburg-based German fire protection specialist with broad portfolio across industrial, marine, and offshore fire suppression — a more diversified competitor serving similar marine customers from a larger scale.

Emerging players

• Fike Corporation: US-based fire protection manufacturer with marine and industrial fire suppression offerings — comparable in product category but with a broader industrial focus and less marine-specific specialization.
• Fireboy-Xintex: Smaller specialist in marine fire suppression and gas detection systems for recreational and light commercial vessels — partial overlap with KJ FireOff® but focused on smaller craft segments.

Regional players

• Wormald Fire Systems: Asia-Pacific fire protection specialist with marine and industrial suppression capabilities — comparable in fire protection category but primarily regional in scope rather than KJ's claimed global marine focus.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/knaack-&-jahn-schiffbau-gmbh

Revenue estimate

Valuation estimate

Number of profiles

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 Knaack & Jahn Schiffbau GmbH