What Sleipner does

Sleipner is a privately held Norwegian marine equipment manufacturer founded in 1982 and headquartered in Fredrikstad, with 251-500 employees. The company designs and builds vessel maneuvering and control hardware - including bow, stern, tunnel, external, and retractable thrusters; Vector Fins™ fin stabilizers; anchor winches; servo and hydraulic steering systems; and bronze and folding propellers - sold under the Sleipner and Side-Power brands. Notable proprietary technologies include Q-Prop™ propellers, PRO™ speed control, and Intelligent Power Control, all marketed as upgrades to the installed base.

The company serves two primary customer segments: recreational/leisure boat owners and professional/commercial marine operators, with products explicitly split between 'fritidsbåt' (leisure) and 'yrkesbåt' (professional) categories on its website. Distribution is channel-led through an authorized dealer network with country-specific websites and dealer-locator functionality for Norway, Sweden, Denmark, Finland, UK, Germany, and Italy, plus an International site. Pricing is not publicly disclosed; the model is configuration-based hardware sales with a meaningful after-market and upgrade revenue stream (E-Series upgrades, PRO-to-E upgrade path, spare parts).

Most recently, Sleipner has begun positioning itself for the autonomous marine market. In February 2026, Robosys Automation added support for Sleipner bow, stern, tunnel, and azimuth thrusters in its VOYAGER AI maritime autonomy software, and in June 2026 the two companies formalized a partnership to deliver integrated station keeping, dynamic positioning, and track control for crewed and uncrewed vessels. This positions Sleipner's thrusters as the actuation layer for third-party autonomy stacks but does not yet represent native in-house AI capability. The CEO is Ronny Skauen. No revenue, headcount trend, funding, or M&A data is publicly disclosed.

Name

Sleipner

Legal name

Sleipner

Website

https://sleipner.no

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

251–500 employees

Ownership category

akta.pro rank

Product category

Marine Equipment Manufacturing

NAICS

Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing (334511), Ship Building and Repairing (336611)

SIC

Ship & Boat Building & Repairing (3730), Engines & Turbines (3510)

akta.pro primary industry

Bow & Stern Thrusters (Tunnel/Retractable) (IMAJAHAG)

akta.pro secondary industries

Propulsion Control, Monitoring & Automation (ECS, PMS interface) (IMAJAHAH), Propulsion Integration, Commissioning & Testing (Factory/sea trials, alignment) (IMAJAHAM), Propulsion, Shafting & Rudder Repair (Engines, Gearboxes, Thrusters) (IMAJAFAC)

Keywords

• Marine thruster systems
• Boat stabilization equipment
• Vessel steering systems
• Marine propulsion components
• Anchor winch systems

Headquarters

HQ city

Fredrikstad

HQ country

Norway

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Marine Thruster Sales: Sale of electric and hydraulic bow thrusters, stern thrusters, tunnel thrusters, external thrusters, and retract thrusters for recreational and commercial marine vessels.
2. Marine Stabilizer Systems: Sale of Vector Fins™ fin stabilizer systems including actuators, control panels, and hydraulic components for vessel roll stabilization.
3. Steering and Propulsion Components: Sale of steering systems, propellers (bronze, folding), propulsion equipment, and related components for marine applications.
4. Spare Parts and Accessories: Sale of replacement parts including actuators, anodes, drive shafts, couplings, electric and hydraulic components, motors, propellers, seals, and gear housings. Also includes electrical accessories such as components, power cables, and signal cables.
5. Thruster Upgrades: Upgrades to E-series systems, including PRO speed control and Q-Prop propeller upgrades for existing installations.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Sleipner designs and manufactures marine thruster systems (bow, stern, tunnel, external, and retractable thrusters), Vector Fins™ fin stabilizers, hydraulic and servo steering systems, anchor winches, and bronze and folding propellers for both leisure and professional vessels. The portfolio is sold primarily through an authorized dealer network across European markets and is supported by proprietary technology upgrades such as Q-Prop™, PRO™ Speed Control, and Intelligent Power Control. The company also offers integration with autonomous maritime control systems through a partnership with Robosys Automation.

Product overview

Sleipner is a maritime technology company offering a diversified portfolio of marine propulsion and vessel control products. The core product line centers on bow and stern thrusters (including tunnel-mounted, external, and retractable variants) with associated control panels, remote controls, and joystick integrations. The portfolio extends to Vector Fins™ stabilization systems, anchor winches, bronze and folding propellers, propeller equipment, and comprehensive steering solutions including servo steering, hydraulic steering (for professional/commercial applications), wheel pumps, and cylinders. Notable technology upgrades include Intelligent Power Control, Q-Prop™, PRO™ Speed Control, and E-Series upgrades. The company serves both recreational (fritidsbåt) and professional/commercial (yrkesbåt) maritime markets. Recent partnerships with Robosys Automation integrate Sleipner thrusters with VOYAGER AI maritime autonomy software for advanced station keeping and dynamic positioning capabilities.

Differentiator

Problem solved

Functional benefit

Brands

• Side-Power: Side-Power thruster brand referenced in product documentation and spare parts lists.

Products and services

• Bow and Stern Thrusters Electric and hydraulic bow and stern thrusters providing lateral propulsion for vessel maneuvering, available in tunnel-mounted, external, and retractable configurations with various thrust ratings for different vessel sizes.
• Vector Fins™ Stabilizers Fin stabilization systems that reduce boat roll and improve comfort at sea, including fin actuators, control panels, hydraulic tanks, and supporting components.
• Anchor Winches Electric and hydraulic anchor winch systems for automated anchor deployment and retrieval, including control panels, remote controls, and supporting installation components.
• Bronze Propellers Fixed-pitch bronze propellers for marine propulsion applications, designed for durability and performance in various operating conditions.
• Folding Propellers Propellers with folding blades that reduce drag when not in use, improving fuel efficiency for sailboats and auxiliary power applications.
• Servo Steering Systems Hydraulic servo steering systems providing smooth and responsive helm control for marine vessels, including wheel pumps, cylinders, steering wheels, and rudders.
• Hydraulic Steering Systems Professional-grade hydraulic steering systems designed for commercial and work vessel applications.
• Spare Parts Replacement components for all product lines, including actuators, anodes, drive pins, drive shafts, couplings, electrical and hydraulic components, motors, propellers, seals, gear housings, and motor mounts.

Quantifiable outcome

• Enhanced station keeping, dynamic positioning, and track control capabilities when integrated with autonomous systems
• +1 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature6 records

Partnerships

One partnership is on record.

• Robosys AutomationcoreTechnology or Integration · 11 June 2026Sleipner and Robosys Automation partnered to integrate Robosys' VOYAGER AI REMOTE autonomy platform with Sleipner thrusters, enabling accurate station keeping, dynamic positioning, and track control for marine vessels. The combined system continuously monitors environmental and operational conditions to maintain stability, enhance safety, and optimise efficiency while reducing crew workload. The partnership positions both companies at the forefront of next-generation marine technology for both crewed and uncrewed marine applications.

Scale indicators1 record

Recent moves4 records

Expansion highlights5 records

Direct peers

• Vetus: Dutch marine equipment manufacturer offering bow and stern thrusters, controls, and complete onboard systems. Directly comparable to Sleipner as a niche specialist selling thrusters and maneuvering systems to both leisure and small-commercial segments through dealer networks across Europe.
• Quick Group: Italian thruster and marine equipment manufacturer with overlapping thruster, stabilizer, and onboard product portfolios. Particularly comparable in Mediterranean leisure and professional markets, where both companies serve yacht builders with thruster and stabilization systems.
• ABT-TRAC: Manufacturer of active fin stabilizers for yachts and commercial vessels. Directly comparable to Sleipner's Vector Fins stabilizer line and competing for the same ride-comfort upgrade spend aboard mid- and large-size vessels.
• CMC Marine: Italian stabilizer specialist serving yacht and commercial segments. Comparable to Sleipner's Vector Fins stabilizer business and the broader stabilization upgrade opportunity across European and Mediterranean shipyards.
• Naiad Dynamics: US-based stabilizer manufacturer with global yacht and naval customer base. Overlaps with Sleipner's Vector Fins in vessel roll-reduction systems, and its multinational reach highlights the geographic gap Sleipner has yet to close in North America.
• Wesmar (Western Marine Electronics): Manufacturer of marine thrusters and stabilizers. Overlaps with Sleipner across both thrusters and stabilization product lines, serving similar commercial and offshore vessel customers.

Broad incumbents

• Volvo Penta: Major marine propulsion and auxiliary systems incumbent offering engines, drives, and integrated controls. Comparable as a broader incumbent whose integrated propulsion packages can displace Sleipner's niche thruster and steering offering on tier-1 OEM deals.
• ZF Marine: Global supplier of marine propulsion, driveline, and control systems. Comparable as a broad incumbent competing against Sleipner's steering and propulsion components through bundled, larger-system solutions to commercial yards.
• Lewmar: Marine equipment manufacturer covering anchoring, thrusters, controls, and steering. Comparable as a broader marine equipment incumbent with overlapping thruster and steering categories plus direct dealer distribution to leisure and commercial markets.
• Mercury Marine: Global marine propulsion and systems manufacturer across outboards, sterndrives, and Joystick Piloting systems. Comparable as a broad incumbent whose joystick and piloting integration competes with Sleipner's thruster-and-control offerings in the leisure segment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

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 Sleipner