What SEDNI does

SEDNI (legally S.A. Sedni) is a privately-held Spanish marine automation specialist headquartered in Alicante, founded in 1987. The company designs, engineers, and commissions integrated alarm, monitoring, and control systems (IAMCS) for shipyards and shipowners, with its proprietary DIAMAR platform deployed on more than 300 vessels across 15+ countries. The DIAMAR architecture is a distributed system using modular I/O hardware with independent local processing installed close to controlled equipment, connected over a triple-redundant CANBUS data bus and supporting protocols including Modbus TCP/IP, CANbus J1939, and Modbus RS485. SEDNI's product portfolio spans the DIAMAR core platform (covering alarm/monitoring, power management system, auxiliary machinery control, cargo/ballast monitoring, reefer monitoring, and HVAC), the NEREIDA cargo loading and stability calculator (approved by all major classification societies), the DIAMAR REMOTE shore-based monitoring add-on, the DIAMAR Economizer fuel/consumption analytics module, and complementary SEDNI Sistemas fire detection (MCA-certified), internal communications, and remote level gauging systems. The company holds Type Approval Certificates from Bureau Veritas, Lloyd's Register, and ABS, plus NATO NCAGE Code 389CB qualification for defense procurement.

SEDNI monetizes through project-based system sales to shipyards during newbuilds and to shipowners during retrofits, with engineering, commissioning, training, and after-sales technical services typically bundled with each delivery. Approximately 70–80% of revenue is estimated to derive from proprietary DIAMAR/NEREIDA systems and engineering services, with the balance coming from distribution, integration, and after-sales support of 17 represented international maritime equipment brands (Air Products, Auramarine, Comsys, Finnoy, Greenoil, GICOM, Intec, Jastram, Marine Lift, Maritime Products, Mitsubishi Kakoki, NK, TMC, Randaberg, Scana Skarpenord, Steerprop, We Tech, Current Scientific). Distribution combines direct sales through specialized technical-commercial engineers in Spain with a four-agent channel network in the UAE (Voyage Marine Automation), Iceland (Naust Marine), Australia (MMEM Defence), and LATAM/USA (HC Grupo). The customer base spans government maritime safety and research authorities (NIOZ, MFRI, NIWA, Environment Agency Abu Dhabi, Spain's Guardia Civil, SASEMAR, MAPA, Portos Dos Açores, Nicaragua Port Authority, Ireland's RV Tom Crean programme) and commercial operators (Grupomar, Red Chamber, Balearia, Consulmar, Nesfiskur), with strategic positioning increasingly oriented toward hybrid and electric vessel automation.

Name

SEDNI

Legal name

S.A. Sedni

Website

https://sedni.com

Company type

Private

Founded year

1987

Operating status

Operating

Headcount range

11–50 employees

Short description

SEDNI is a privately-held Spanish marine automation specialist, founded 1987 in Alicante, that designs and commissions its proprietary DIAMAR distributed IAMCS, NEREIDA cargo loading calculator, and complementary fire/communications systems for shipyards and shipowners on 300+ vessels across 15+ countries.

Ownership category

akta.pro rank

Product category

Marine Automation Systems

NAICS

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

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Ship & Boat Building & Repairing (3730)

akta.pro primary industry

Marine Automation, Control & PLC/SCADA Systems (IMAJAJAC)

akta.pro secondary industries

Marine Electrical Installation, Commissioning & Field Services (IMAJAJAL), Marine Systems Commissioning, Testing & Certification Support (TLAKAKAM), Electrical, Automation & Control Systems Repair (TLAKAKAG), Electrical, Automation & Control Systems (Power, PLC/SCADA, Navigation/Comms Integration) (TLAHAMAE)

Keywords

• Marine automation systems
• Naval control systems
• Ship alarm monitoring
• Cargo loading calculator
• Marine power management

Headquarters

HQ city

Alicante

HQ country

Spain

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Proprietary Product Sales (DIAMAR, NEREIDA, SEDNI Systems): Sale of proprietary marine automation systems (DIAMAR), cargo calculators (NEREIDA), and complementary systems (fire detection, internal communications, remote level gauges). Systems are sold as integrated solutions to shipyards during newbuild and to shipowners during retrofit projects. Revenue is generated per vessel/project.
2. Commissioning and Technical Services: Technical support, commissioning, training courses for operators and maintenance personnel, and simulation services delivered by specialized engineers through the agent network. Typically bundled with system sales.
3. Equipment Distribution and Supply: Distribution and supply of equipment from represented international brands (Air Products, Auramarine, Comsys, Finnoy, Greenoil, GICOM, Intec, Jastram, Marine Lift, Maritime Products, Mitsubishi Kakoki, NK, TMC, Randaberg, Scana Skarpenord, Steerprop, We Tech, Current Scientific). SEDNI commercially represents these companies and provides engineering, commissioning, and after-sales technical services.
4. Engineering, Design and Custom Project Development: Custom engineering, design, and development of tailor-made automation projects for vessels. Includes refit/retrofit/conversion of machinery automation systems and technical consulting.

Go-to-market motion3 records

Distribution channels3 records

Marketing channels5 records

Core offering

SEDNI designs, manufactures, and commissions marine automation systems (primarily the DIAMAR distributed IAMCS) and the NEREIDA cargo loading calculator for shipyards and shipowners, complemented by addressable fire detection, internal communications, and remote tank level gauging systems. The company provides engineering, commissioning, training, simulation, and after-sales technical services per vessel/project, and represents 17 international maritime equipment brands.

Product overview

SEDNI offers a unified marine automation portfolio anchored by the DIAMAR® system, a distributed integrated alarm monitoring and control system (IAMCS) with triple-redundant CANBUS architecture. This core platform is complemented by the NEREIDA cargo loading calculator for stability and strength calculations, the diamar® REMOTE remote monitoring add-on, and the diamar® Economizer consumption optimization module. SEDNI also provides supplementary systems including fire detection, internal communications, and tank level gauging systems. The portfolio serves diverse vessel types including offshore vessels, passenger vessels, bulkcarriers, research vessels, fishing vessels, patrol boats, and special purpose vessels.

Differentiator

Problem solved

Functional benefit

Brands

• DIAMAR: Marine automation system - a distributed integrated alarm monitoring and control system (IAMCS) designed to meet demanding requirements of shipyards and shipowners, with modular hardware components for optimal solutions across vessel types.
• DIAMAR REMOTE
• NEREIDA
• SEDNI Sistemas

Products and services

• DIAMAR Distributed Integrated Alarm Monitoring and Control System (IAMCS) with triple-redundant CANBUS data bus and modular I/O hardware installed close to controlled equipment. Integrates alarm/monitoring, Power Management System (PMS), auxiliary machinery control, cargo/ballast monitoring, reefer monitoring, and HVAC. Sold as integrated turnkey systems to shipyards for newbuild and to shipowners for retrofit.
• NEREIDA Loading Calculator Cargo loading and stability calculation software for all vessel types, with 3D graphical interface, intact and damage stability calculation per IMO weather criteria, longitudinal strength and torsion calculations, draft and trim optimization, and connectivity with main automation and tank gauging systems. Approved by Bureau Veritas, Lloyd's Register, ABS, RINA, and DNV. Sold as standalone software to shipyards and shipowners.
• SEDNI Sistemas: Fire Detection Systems Addressable fire detection systems with MCA certification for fire panels and detectors/MCPs, integrable with the DIAMAR automation platform. Supplied to shipyards and shipowners as part of vessel automation packages.
• SEDNI Sistemas: Internal Communications Systems Internal communications systems for vessels, integrable with the DIAMAR platform. Supplied to shipyards and shipowners for newbuild and retrofit projects.
• SEDNI Sistemas: Remote Level Gauges Tank level gauging systems for remote monitoring of liquid levels aboard vessels, integrable with the DIAMAR platform. Supplied to shipyards and shipowners.
• Engineering, Commissioning, Training, and After-Sales Services Custom engineering, design, commissioning, simulation, operator/maintenance training, and after-sales technical support for vessel automation projects. Includes refit/retrofit/conversion of machinery automation systems and technical consulting. Delivered by SEDNI's specialized engineers and regional agents.

Quantifiable outcome

• 300+ vessels currently operating worldwide with DIAMAR installed
• +3 more outcomes

Named customers15 records

Segments6 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Four partnerships are on record, tiered core.

• Voyage Marine Automation (UAE)coreChannel Partner/ Reseller/ DistributorRegional agent for SEDNI products in the United Arab Emirates market. Located at Dubai Maritime City, providing commercial and technical representation for DIAMAR and NEREIDA products in the Gulf region. Contact: [email protected] / +971529067715
• Naust Marine (Iceland)coreChannel Partner/ Reseller/ DistributorRegional agent for SEDNI products in Iceland. Located at Hafnarfjörður. Supports DIAMAR installations on Icelandic vessels including research and fishing fleet. Contact: [email protected] / +354 843 8524
• MMEM Defence (Australia)coreChannel Partner/ Reseller/ DistributorRegional agent for SEDNI products in Australia. Located at North Rocks, NSW. Provides commercial and technical support for DIAMAR automation systems in the Australian maritime market. Contact: [email protected] / +61447377378
• HC Grupo (LATAM)coreChannel Partner/ Reseller/ DistributorRegional agent for SEDNI products in Latin America, with offices in Coral Springs, FL (USA) and Coslada, Madrid (Spain). Covers the LATAM maritime market for DIAMAR and NEREIDA products. Contact: [email protected] / +1-954-227-0150, +34-910-103-053

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Siemens Energy (Marine Solutions): Supplies marine electrification, automation, and digital solutions through SISHIP and BlueDrive platforms. Competes with DIAMAR in hybrid/electric vessel integration and shipboard power management at a much larger scale.
• ABB Marine & Ports: Global incumbent offering marine automation, power management, and electric propulsion solutions as part of a much broader industrial portfolio. Competes in IAMCS and hybrid vessel integration (e.g., system integrations on hybrid ferries) but at substantially larger scale.
• JRC (Japan Radio Co.): Provides marine automation and navigation systems as part of a broader electronics portfolio serving shipbuilders globally. Overlaps with SEDNI on automation, navigation/comms integration, and bridge systems for Asian-built commercial vessels.
• Rolls-Royce Power Systems (mtu): Provides propulsion-integrated automation and control solutions for naval and commercial vessels via its mtu and Automation & Control offerings. Overlaps with DIAMAR on engine room and propulsion monitoring for military and commercial marine customers.
• Wärtsilä: Finnish broad incumbent offering integrated automation, power management, and engine room solutions through its SmartShip ecosystem. Competes with DIAMAR in vessel automation, particularly on hybrid and dual-fuel projects, though typically bundled with propulsion packages.

Direct peers

• Kongsberg Maritime: Global leader in marine automation, including integrated alarm monitoring and control systems (IAMCS), power management, and vessel control. Most directly comparable to SEDNI's DIAMAR portfolio, though operating at vastly larger scale and with broader portfolio across vessel segments.
• Praxis Automation Technology: Dutch marine automation specialist offering integrated automation systems (IAS), power management, and loading computers for shipyards and shipowners. Closely comparable niche player with similar vessel segment focus (offshore, navy, commercial, special purpose).
• Marine Technologies LLC: US-based marine automation provider offering integrated control, alarm monitoring, and power management systems for offshore and commercial vessels. Comparable niche scope to SEDNI with overlapping customer base in tug, offshore, and research vessel segments.
• Høglund Marine Automation: Norwegian specialist in marine automation and control systems serving offshore, naval, and commercial vessel segments. Comparable mid-sized competitor with integrated automation, power management, and class-approved offerings similar to DIAMAR.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/s-a-sedni

Compliance3 records

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 SEDNI