What MAREAL does

Mareal is a France-based offshore engineering services firm headquartered in L'Haÿ-les-Roses with a second office in Nantes. Founded in 2002 and operating as a wholly-owned subsidiary of STAPEM Group, the firm employs approximately 25 engineers and draftsmen representing five nationalities. Mareal delivers end-to-end offshore structural engineering — from feasibility and concept studies through detailed execution engineering, fabrication drawings, life-extension assessments, and certification assistance — serving enterprise clients in oil & gas, offshore wind, and marine civil engineering. Its commercial model is project-based professional services sold via direct enterprise engagement, with work secured through industry relationships, STAPEM Group network referrals, and competitive tendering.

The firm's core technical stack centers on industry-standard finite element and structural analysis tools (Bentley SACS, ABAQUS, TEKLA) used for lifting and transportation studies, fatigue and dynamic analysis, buckling and stability, ship impact, and seismic assessment, with compliance against ISO, API, and DNV codes. Mareal's principal proprietary asset is the XCF (X-shaped Concrete Floater), a semi-submersible concrete platform designed for floating offshore wind turbines scaled from 10 MW to 22 MW, with Technology Readiness Level 6 and Approval in Principle secured from Bureau Veritas and DNV. The XCF features a modular X-shaped geometry intended to optimize stress distribution and enable local fabrication. The firm also offers the Rockmat solution for foundations on uneven seabeds.

Mareal's customer base includes major European and global enterprises — Bouygues, EDF Renouvelables, Saipem, Technip Energies, Naval Group, Eiffage, Perenco, Dragados Offshore, and Aquaterra Energy — across oil & gas, renewable energy, construction, and defense. Notable reference projects include detailed monopile foundation design for the Saint-Nazaire offshore wind farm, FPSO revamping in Ghana, and wellhead platform engineering in Nigeria. The firm markets primarily through industry conferences (IOWTC 2025, Forum Atlantique, Forum ESTP) and direct enterprise relationships, with no self-serve or channel-partner sales motion.

Name

MAREAL

Legal name

Mareal

Website

https://mareal.eu

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

11–50 employees

Short description

MAREAL is a French offshore engineering firm specializing in structural design, analysis, and certification for oil & gas and offshore wind clients. Its 25-person team delivers feasibility-to-execution engineering, anchored by the proprietary XCF floating wind concrete platform validated by Bureau Veritas and DNV.

Ownership category

akta.pro rank

Product category

Offshore Engineering Services

NAICS

Mining and Oil and Gas Field Machinery Manufacturing (33313)

SIC

Oil & Gas Field Machinery & Equipment (3533)

akta.pro primary industry

Offshore Wind Substructures & Marine Engineering (Monopiles, Jackets, Floating) (EUAMACAE)

akta.pro secondary industries

Project Management & Owner’s Engineering / Technical Consultancy (Spec Writing, Bid Support, Site Support) (IMAJAGAO), Structural & Hull Engineering (Scantlings, Fatigue, Vibration, Noise) (IMAJAGAC), Production Design & Detailed Engineering (3D CAD, Drawings, BOM, Nesting) (IMAJAGAK), Safety, Risk & Compliance Engineering (SOLAS, Class Rules, HAZID/HAZOP, FMEA) (IMAJAGAJ)

Keywords

• Offshore engineering services
• Structural design analysis
• Floating wind platforms
• Offshore foundations
• Subsea structural assessment

Headquarters

HQ city

L'hay-les-roses

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales, Others

Revenue model

1. Engineering Services: End-to-end offshore engineering services spanning from feasibility studies and concept design to detailed execution engineering and construction plans. Services include structural design and analysis, fabrication and construction drawings, structural life assessment and extension, offshore foundations design, and certification assistance. Revenue generated through project-based professional services contracts with oil & gas and renewable energy clients.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

MAREAL provides end-to-end offshore structural engineering services for the oil & gas and marine renewables sectors, spanning feasibility studies, concept and detailed design, fabrication drawings, structural life assessment, offshore foundation design, and certification assistance. Its proprietary XCF (X-shaped Concrete Floater) is a semi-submersible concrete platform designed for next-generation floating offshore wind turbines from 10 MW to 20+ MW. The firm uses industry-leading tools such as Bentley SACS, ABAQUS, and TEKLA for finite element modeling, fatigue and dynamic analysis, and code compliance.

Product overview

MAREAL is an offshore engineering company offering end-to-end engineering services for both oil & gas and marine renewables sectors. The company provides a unified portfolio combining the XCF (X-shaped Concrete Floater) as a core proprietary product for floating offshore wind applications, alongside six specialized service offerings covering structural design and analysis, fabrication drawings, structural life assessment, offshore foundations, and certification assistance. Operating as part of the STAPEM Group with a team of 25 engineers across L'Haÿ-les-Roses and Nantes, MAREAL delivers integrated engineering solutions from concept to execution.

Differentiator

Problem solved

Functional benefit

Brands

• XCF: X-shaped Concrete Floater - Mareal's innovative semi-submersible platform designed for floating offshore wind turbines, scalable from 10 MW to 20+ MW capacity.

Products and services

• XCF – X-shaped Concrete Floater MAREAL's proprietary semi-submersible concrete platform designed for floating offshore wind turbines from 10 MW to 20+ MW, with X-shaped geometry that optimizes stress distribution and enables local manufacturing to reduce supply chain risks.
• Structural Design & Analysis Specialized offshore structural design and analysis services for fixed offshore structures including jackets and platforms, using Bentley SACS, ABAQUS, and TEKLA for finite element modeling, fatigue analysis, and compliance with international codes such as ISO, API, and DNV.
• Fabrication & Construction Drawings Detailed fabrication drawings, control reports, material take-offs, welding specifications, as-built documentation, and 3D modeling support ensuring precision and efficiency throughout offshore fabrication and installation phases.
• Structural Life Assessment & Extension Comprehensive structural lifespan evaluation services for offshore assets, including fatigue analysis, life extension assessments, retrofit solutions, structural health monitoring, and risk assessments aligned with industry standards.
• Offshore Foundations & Soil-Structure Interaction Design and analysis of offshore foundations including monopile, jacket, and gravity-based foundations, with advanced soil-structure interaction modeling, geotechnical assessments, and installation method optimization.
• Assistance & Certifications Certification documentation preparation, expert assessments, liaison with certification authorities, third-party design reviews, training programs, and risk management services supporting regulatory compliance for offshore projects.

Quantifiable outcome

• XCF platform scaled from 10 MW to 22 MW configurations with detailed industrial studies for fabrication, assembly, and supply chain optimization
• +3 more outcomes

Named customers9 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• STAPEM GroupcoreStrategic or Co-development PartnerSTAPEM Group is the parent company of Mareal, providing strategic direction, access to affiliated companies (d2m Engineering, d2m Services, Film-Ocean, Stapem Offshore Angola, Stapem Offshore Energy Services, etc.), and operational capabilities across marine operations, subsea expertise, and renewable energy. The group operates across Europe, Africa, Middle East, and beyond.

Scale indicators3 records

Recent moves1 record

Expansion highlights5 records

Broad incumbents

• COWI: Large Danish engineering consultancy with a major offshore wind foundation and structural design practice. Comparable as an offshore structural engineering services provider serving the same developer and EPC clients in European offshore wind, but at materially larger scale.
• Ramboll: Global engineering consultancy with a strong offshore wind and offshore structures practice. Competes for the same foundation design, fatigue analysis, and owner's engineering mandates on European offshore wind projects as Mareal.
• Saipem: Major offshore EPCI contractor with in-house offshore structural engineering capabilities. Listed as a Mareal client but possesses the resources and offshore installation fleet to perform detailed engineering internally on competing scopes.
• Technip Energies: Large offshore engineering and project management contractor with extensive offshore structure design capabilities. Listed Mareal client with substantial in-house engineering capacity that competes for the same scopes.
• Genesis (Worley): Offshore engineering consultancy within Worley providing concept and front-end offshore structure design. Comparable service offering to Mareal's concept and feasibility work but with global reach and substantially larger resources.

Direct peers

• OWC (Offshore Wind Consultants): Boutique offshore wind engineering consultancy offering owner's engineering, technical due diligence, and concept design. Comparable scale and service profile to Mareal's offshore wind practice.
• Wood Thilsted: Specialized offshore wind engineering consultancy focused on foundation and structural design. Closest direct peer to Mareal: small team, deep offshore wind structural engineering expertise, serves the same European floating and fixed-bottom wind developer base.
• Doris Engineering: French offshore engineering consultancy providing concept, FEED, and detailed engineering for fixed and floating offshore structures. Direct competitor in the French and West African offshore engineering market.

Emerging players

• Aquaterra Energy: Offshore engineering solutions provider for offshore wind, oil & gas, and CCS. Listed as a Mareal client but operates in overlapping scopes (offshore structural engineering, platform design), making it both customer and adjacent competitor.
• K2 Management: Specialized offshore wind technical and commercial advisory firm offering owner's engineering and project development services. Comparable boutique scale to Mareal with a similar European offshore wind client base.

Market position

Strengths2 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/mareal_ceteal
• LinkedInlinkedin.com/company/mareal-engineering-and-consulting

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

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 MAREAL