Sleipner As

What Sleipner As does

Sleipner AS is a Norwegian marine technology company headquartered in Fredrikstad, Norway, that designs, manufactures, and distributes marine thrusters, stabilizers, hydraulic steering systems, and anchor windlasses for both leisure boats and commercial vessels. The company operates a vertically integrated business spanning product design, engineering, and manufacturing, with a portfolio built around four core product lines (Thruster Systems, Stabilizers, Steering Systems, and Anchor Windlasses) supported by a proprietary S-Link™ CAN-based control system that enables cross-product communication onboard a single vessel. Its technology stack includes the patented Vector Fins™ stabilizer design (concave hydrodynamic shape delivering up to 95% roll reduction while cruising and 50% efficiency gains at anchor), Q-Prop™ propeller upgrades, Variable Speed Control, and Intelligent Power Control, with a miniaturization advantage of up to 75% more compact actuators than competitors.

The company monetizes through hardware sales via two channels: a global authorized dealer network providing sales, installation, and service, and a direct-to-consumer e-commerce platform with a thruster system builder tool. Pricing is dealer-mediated and not publicly disclosed. Customer segments are split between leisure boat owners (recreational boating, yacht ownership, pleasure cruising) and professional/commercial vessel operators (work boats, commercial maritime), with no named-end-user customer logos disclosed. The company was formerly known as Side-Power and rebranded to Sleipner Group around 2023 while maintaining product continuity. It maintains localized websites across seven European countries (Norway, Sweden, Denmark, UK, Germany, Finland, Italy) and operates with 101-250 employees. The company is privately held with no disclosed parent company, institutional investors, or funding rounds.

Name

Sleipner As

Legal name

Sleipner As

Website

https://www.sleipnergroup.com

Company type

Private

Founded year

1908

Operating status

Operating

Headcount range

101–250 employees

Short description

Sleipner AS is a Norwegian marine equipment manufacturer that designs and produces thrusters, stabilizers, hydraulic steering systems, and anchor windlasses for leisure boats and commercial vessels, distributed globally through dealers and direct e-commerce.

Ownership category

akta.pro rank

Product category

Marine Equipment Manufacturing

NAICS

Ship Building and Repairing (336611), Ship and Boat Building (33661), Ship and Boat Building (3366), Fluid Power Pump and Motor Manufacturing (333996)

SIC

Ship & Boat Building & Repairing (3730), Engines & Turbines (3510), Pumps & Pumping Equipment (3561)

akta.pro primary industry

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

akta.pro secondary industries

Propulsion Cooling, Lubrication & Auxiliaries (Pumps, heat exchangers, filters) (IMAJAHAL), Propellers & Waterjets (IMAJAHAE), Marine Generators, Alternators & Power Electronics (Gen-sets, VFDs, converters) (IMAJAHAI), Propulsion MRO, Spares & Field Service (Overhauls, retrofits, upgrades) (IMAJAHAN)

Keywords

• Marine thruster systems
• Boat stabilizers
• Hydraulic steering systems
• Anchor windlasses
• Marine equipment manufacturing

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, Marketing or Sales

Revenue model

1. Marine Equipment Sales: Sale of thrusters, stabilizers, steering systems, and anchor windlasses for leisure and commercial boats. Products sold through dealers and direct-to-consumer e-commerce.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels8 records

Core offering

Sleipner As designs, develops, and manufactures marine propulsion and stabilization equipment, including bow and stern thrusters, Vector Fins™ stabilizer systems, hydraulic steering systems, and anchor windlasses. The company supplies these products to leisure boat owners and commercial vessel operators through a global dealer network and direct e-commerce channels.

Product overview

Sleipner Group (formerly Side-Power) is a Norwegian marine technology company that creates world-leading technical solutions for boats, consistently improving safety and comfort at sea. The company offers a comprehensive product portfolio comprising four core product lines: Thruster Systems (including bow and stern thrusters with tunnel, external, and retractable options, plus control units and upgrades like Q-Prop™ and Intelligent Power Control), Stabilizers featuring the patented Vector Fins™ technology (available in both electric and hydraulic variants with various sizes from 0.65m² to 1.95m² for vessels from 52ft to 141ft), Steering Systems (hydraulic steering including power steering, helm pumps, and cylinders), and Anchor Windlasses (with controlled free-fall systems). The products are designed for both leisure boats and commercial/professional vessels, with supporting technologies like S-LINK™ for inter-product communication. The company is transitioning from the legacy Side-Power brand to Sleipner while maintaining product continuity.

Differentiator

Problem solved

Functional benefit

Brands

• Side-Power: Former brand name; the company has rebranded from Side-Power to Sleipner while maintaining the same products.

Products and services

• Thruster Systems
• Stabilizers (Vector Fins™)
• Steering Systems
• Anchor Windlasses

Quantifiable outcome

• Up to 50% more efficient at anchor compared to flat fins
• +4 more outcomes

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Direct peers

• Naiad Dynamics: Naiad Dynamics is a US-based specialist in marine stabilization systems, including fin and gyro stabilizers. It is a direct competitor to Sleipner's Vector Fins™ stabilizer product line, particularly in the larger yacht and commercial segments.
• Quick Group: Quick Group is an Italian marine equipment manufacturer offering bow thrusters, windlasses, and onboard systems. It directly competes with Sleipner in thrusters and anchor windlasses for the leisure and small commercial segments.
• Maxwell Marine: Maxwell Marine is a New Zealand-based manufacturer of anchor windlasses, capstans, and related deck equipment. It directly competes with Sleipner's windlass product line for leisure and commercial vessels.
• Humphree: Humphree is a Swedish manufacturer of interceptors, stabilizers, and dynamic motion-control systems for boats. It directly competes with Sleipner's Vector Fins™ stabilizer line in the leisure and commercial vessel market.
• CMC Marine: CMC Marine is an Italian maker of marine stabilization systems (Stabilis Electra) and bow/stern thrusters. It is a direct competitor to Sleipner in stabilizers and adjacent thruster products for yachts and light commercial vessels.
• Vetus: Vetus is a Dutch marine equipment manufacturer producing bow thrusters, steering systems, and engine solutions for recreational and small commercial vessels. It directly competes with Sleipner in thrusters and steering for the leisure boat market.
• Lewmar: Lewmar is a UK-headquartered marine equipment manufacturer producing windlasses, thrusters, winches, and steering systems for leisure and commercial boats. It directly competes with Sleipner across thrusters, windlasses, and steering.

Broad incumbents

• ZF Friedrichshafen (ZF Marine): ZF is a global Tier-1 supplier of marine propulsion, driveline, and control systems including thrusters and steering. It is comparable to Sleipner in the thruster and steering categories but operates at much larger scale and across many marine segments beyond leisure.
• Twin Disc: Twin Disc is a US manufacturer of marine transmissions, propulsion, and power-take-off systems. It is a broader incumbent in marine propulsion and driveline, with overlapping mechanized-component capabilities comparable to Sleipner's gearboxes and thruster drives.

Emerging players

• ABT-TRAC: ABT-TRAC develops active trim and stabilization systems for boats. It overlaps with Sleipner's stabilization and motion-control offerings, particularly in the smaller-to-mid-size leisure boat segment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@sleipner_official
• Facebookfacebook.com/sleipnergroup
• LinkedInlinkedin.com/company/sleipnerofficial
• Instagraminstagram.com/sleipner_official

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 Sleipner As