MARIDIS GmbH

What MARIDIS GmbH does

MARIDIS GmbH is a privately held German maritime diagnostics company founded in 2005 and headquartered in Rostock, Mecklenburg-Vorpommern. The company designs, manufactures, and services proprietary measurement and diagnostic systems for large two- and four-stroke marine diesel engines and stationary power plants, serving ship owners, fleet operators, and power generation operators worldwide. Its product portfolio is anchored by the "Mar"-branded family: mobile diagnostic devices (MarPrime, MarPrime Ultra with ultrasonic engine-timing sensor, MarPeak Analog/Digital, MarComp, MarLiner with laser-precision liner inspection) and fixed-installation systems (Liwat liner wall temperature monitoring, MarTorque propeller shaft torque measurement), complemented by software (MarPrime Instruct for engine optimization, MarNoon for MRV/MRV-compliant onboard data capture, and the Maritime Service Centre cloud platform for fleet reporting) and spare-parts logistics under MarParts.

The technology stack rests on cylinder pressure measurement, ultrasonic sensing, laser-based precision scanning, temperature monitoring, and torsional measurement, feeding into a centralized reporting platform that supports IMO regulatory outputs including MRV (Monitoring, Reporting, Verification) and, since 2024, Carbon Intensity Indicator (CII) calculations. MARIDIS generates revenue through proprietary hardware sales, OEM and genuine spare-parts distribution, software licensing/subscriptions, and a Marshop e-commerce storefront for used, overhauled, and new equipment. The go-to-market combines direct enterprise sales, a global network of regional trading agents, a service partnership with MLS Maritime Liner Service for MarLiner inspections, and recurring participation at SMM trade shows in Hamburg. Only two customer logos are publicly named (Lauritzen Offshore and Lauritzen Tankers), and revenue figures are not disclosed. The company has received two EU European Regional Development Fund grants (2017 for the MarThrust propeller-thrust project, 2019 for software-based diagnostic tool development) and is led by Managing Director Daniel Gau.

Name

MARIDIS GmbH

Legal name

Maridis GmbH

Website

https://maridis.de

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

MARIDIS GmbH is a German maritime diagnostics firm that designs and manufactures proprietary measurement hardware and software for monitoring, optimizing, and ensuring regulatory compliance of large marine diesel engines and stationary power plants, serving shipowners, fleet operators, and power-plant operators globally.

Ownership category

akta.pro rank

Product category

Marine Engine Diagnostics

NAICS

Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451)

SIC

Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Propulsion Control, Monitoring & Automation (ECS, PMS interface) (IMAJAHAH)

akta.pro secondary industries

Propulsion MRO, Spares & Field Service (Overhauls, retrofits, upgrades) (IMAJAHAN), Electrical, Automation & Navigation MRO (Power, Controls, Comms, ECDIS/Radar) (IMAJAFAD)

Keywords

• Marine engine diagnostics
• Cylinder pressure measurement
• Maritime condition monitoring
• Propeller shaft torque measurement
• Diesel engine spare parts

Headquarters

HQ city

Rostock

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Diagnostic Hardware Devices: Sale of proprietary measurement and diagnostic devices including MarPrime, MarPrime Ultra, MarPeak, MarComp, MarLiner, Liwat, and MarTorque systems. These are mobile or fixed-installation products for marine diesel engine diagnostics.
2. Software Licenses and Subscriptions: MarPrime Instruct optimization software and MarNoon cloud-based Maritime Service Centre for fleet data management and MRV compliance reporting.
3. Spare Parts (MarParts): Worldwide delivery of OEM and genuine spare parts for diesel engines, including immediate availability from stock and expert services.
4. Marshop E-commerce: Online shop selling used, completely overhauled and new equipment by MARIDIS and qualified partners.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

MARIDIS GmbH develops and sells proprietary diagnostic and measurement hardware for large marine diesel engines and stationary power plants, including mobile devices (MarPrime, MarPrime Ultra, MarPeak, MarComp, MarLiner) and fixed installation systems (Liwat, MarTorque). These are complemented by software platforms such as MarPrime Instruct for engine optimization and MarNoon for MRV/CII regulatory compliance, all unified through the Maritime Service Centre for fleet data management. The company also supplies OEM and genuine spare parts globally through MarParts and operates the Marshop e-commerce platform for used and new equipment.

Product overview

MARIDIS GmbH offers a comprehensive maritime diagnostic portfolio consisting of mobile measurement devices (MarPrime, MarPrime Ultra, MarPeak Analog/Digital, MarComp, MarLiner) for onboard engine diagnostics and fixed installation systems (Liwat, MarTorque) for continuous monitoring. These hardware products are complemented by software solutions including MarPrime Instruct for engine optimization, MarNoon for MRV control and emissions monitoring, and the Maritime Service Centre platform for fleet data analysis. The company also provides spare parts through MarParts and an e-commerce platform via MarShop. The product ecosystem is designed to enable engine protection, consumption optimization, and regulatory compliance for marine diesel engines and power plants.

Differentiator

Problem solved

Functional benefit

Brands

• MarPrime System: All-in-one solution for engine diagnosis, cylinder pressure measurement and analysis for 2- and 4-stroke marine diesel engines
• MarPrime
• MarPrime Ultra
• MarPrime Instruct
• MarPeak Analog
• MarPeak Digital
• MarComp
• MarLiner
• Liwat
• MarTorque
• MarNoon
• MarParts
• Maritime Service Centre (MSC)
• MarShop

Products and services

• MarPrime System An all-in-one solution for engine diagnosis, optimal performance and reducing consumption. A simple, user-friendly device for measuring cylinder pressure and analysing the combustion process of 2- and 4-stroke marine diesel engines and stationary power plants.
• MarPrime & MarPrime Ultra Cylinder pressure indicator for marine diesel engines. MarPrime Ultra includes an ultrasonic sound sensor enabling precise engine timing determination such as start and finish of injection process and engine valve timing.
• MarPrime Instruct Software that optimizes engine operation for low fuel and cylinder consumption and high engine reliability. In combination with MARIDIS handheld all-in-one cylinder pressure indicators, it makes any other additional software expendable and includes CII calculation.
• MarPeak Analog Peak Pressure Indicator to measure the applied maximum gas pressure of the diesel engine for every cylinder station with the indicator cock and the corresponding W1-1/6" standard thread. Particularly suitable for indicating tasks on diesel engines.
• MarPeak Digital Digital Peak Pressure Indicator to measure the applied maximum gas pressure of the diesel engine for every cylinder station with the indicator cock and the corresponding W1-1/6" standard thread. Particularly suitable for indicating tasks on diesel engines.
• MarComp Combustion Chamber Tester that monitors the current condition of valves and piston rings. It lowers operational efforts by suggesting the ideal point of time for overhauling engines with new piston rings through early detection.
• MarLiner Cylinder liner inspection device that reduces downtimes and unplanned repairs. No dismantling of the main engine or immobilization of the ship is necessary; the device collects data with laser-sharp precision and provides full control regarding wear of liners.
• Liwat Liner Wall Temperature Monitoring System that monitors the piston running performance by measuring the temperature of the upper part of the cylinder liner. Higher friction between piston rings and liner results in an increased characteristic temperature level which may lead to scuffing.
• MarTorque Torque Measurement System that takes torsion measurement on the running propeller shaft with 4 sensors. Calculates torque and power output in relation to the torsion forces on the propeller shaft. The system can easily be installed and calibrated by the customer every time.
• MarNoon Software that gathers all relevant data on ship operations anywhere in the world, giving full MRV (Monitoring, Reporting, Verification) control, providing immediate onboard analysis and online transfer capabilities to the Maritime Service Centre at MARIDIS GmbH.
• Maritime Service Centre Platform for representation of engine diagnosis data by diagrams, trends and tables to support communication between user and controller. Compilation of expert reports is based on the monthly or daily data received from vessels in a fleet or power plant.
• MarParts Worldwide delivery of carefully chosen OEM and genuine spare parts, as well as expert services for diesel engines. Maintains a considerable stock of spares to ensure supply of all kinds of engine parts with immediate and adequate support.

Quantifiable outcome

• No engine dismantling or ship immobilization required for cylinder liner inspections
• +1 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature8 records

Partnerships

One partnership is on record.

• MLS Maritime Liner ServiceminorChannel Partner/ Reseller/ DistributorMLS Maritime Liner Service is a specialized service partner for cylinder liner inspection using the innovative MarLiner system developed by MARIDIS. MLS provides local service delivery for the MarLiner product in the maritime market.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Kistler Group: Swiss-headquartered manufacturer of cylinder pressure sensors, combustion analysis, and engine measurement instrumentation for automotive, marine, and industrial applications. Directly comparable to MARIDIS because both supply precision cylinder pressure indicators and combustion analyzers for large diesel engines, including marine propulsion.
• FEV Group: German engineering services and measurement systems provider focused on engine, drivetrain, and powertrain development. Comparable to MARIDIS because both serve marine and stationary engine OEMs/operators with measurement and diagnostic instrumentation, including combustion and performance optimization tooling.
• PC Maritime: UK-based supplier of fleet performance monitoring software and condition-based maintenance tools for commercial shipping operators. Comparable to MARIDIS because both target ship owners and fleet operators with monitoring, analytics, and compliance software tied to fuel efficiency and emissions reporting (MRV/CII).
• AVL List GmbH: Austrian provider of engine development tools, measurement systems, and powertrain testing solutions including combustion analysis and cylinder pressure measurement. Comparable to MARIDIS because both develop and sell proprietary diagnostic and measurement instruments used to optimize large combustion engines, though AVL is considerably larger and more diversified.

Broad incumbents

• ABB Marine & Ports: Major industrial vendor providing automation, digital solutions, and vessel monitoring systems for ships. Comparable to MARIDIS as a broad incumbent with overlapping capabilities in engine and vessel performance monitoring, though ABB operates at significantly larger scale and across the full marine automation stack rather than engine-diagnostic specialization.
• Wärtsilä: Finnish marine engine OEM and lifecycle services provider whose SmartShip and Condition-Based Maintenance offerings incorporate engine performance monitoring. Comparable to MARIDIS because it serves the same ship operators with engine health monitoring, fuel optimization, and emissions compliance, but with much broader engine manufacturing footprint.
• Kongsberg Maritime: Norwegian supplier of integrated vessel control, automation, and condition monitoring systems for commercial shipping. Comparable to MARIDIS because both provide software-driven engine and operational monitoring layered on hardware sensors, though Kongsberg covers integrated bridge systems and full vessel automation rather than engine diagnostic specialization.
• MAN Energy Solutions: Major German marine engine OEM (MAN B&W) with digital service and engine monitoring offerings for its installed large diesel engine base. Comparable to MARIDIS because ship operators using MAN B&W engines are the same buyers of MARIDIS diagnostic tools, and MAN-ES competes for engine performance data and aftermarket service revenue.

Emerging players

• Praxis Automation Technology: Marine automation and monitoring system supplier serving shipyards and operators with engine and vessel performance solutions. Comparable to MARIDIS through overlapping engine and vessel monitoring use cases, though Praxis is more broadly focused on integrated automation rather than handheld specialized diagnostic instruments.

Others

• Lloyd's Register: International classification society and marine technical services provider with rules, regulatory oversight, and digital services around vessel emissions and condition. Comparable to MARIDIS as an adjacent/ecosystem participant that shapes the regulatory framework (MRV/CII) that MARIDIS's software tools help operators comply with.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/maridis-gmbh

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 MARIDIS GmbH