What INNOSEA does

INNOSEA (now rebranded as OWC, Offshore Wind Consultants) is an independent engineering consultancy specialising in marine renewable energies, with original roots in Nantes, France, founded in 2012. Following its full integration into ABL Group in July 2025, the firm operates as ABL Group's dedicated renewable energy consultancy branch, with its headquarters at the Northern & Shell Building in London and a global delivery footprint spanning 44+ countries and 200+ personnel. The business sells technical advisory and consultancy services to enterprise renewable energy developers and operators, organised across four practice lines: technical due diligence, owner's engineering (including offshore wind asset management), environment and consents, and specialised technical studies (cable consultancy, electrical engineering, geoscience, wind measurement and metocean advisory, WTG, foundation, and integrated loads analysis). Engineering design is delivered through structural engineering and ocean engineering teams, the latter now embedded within ABL Group's Longitude design branch.

The commercial proposition is a horizontal professional services platform covering offshore wind (fixed and floating), onshore wind, solar (floating, ground mounted, rooftop), energy storage, wave and tidal, and hydrogen, allowing the firm to engage developers across the full project lifecycle from concept to operations. The go-to-market is sales-led, direct enterprise engagement with no public pricing disclosed; pricing is project-based and bespoke. The firm carries ISO 9001, 14001, and 45001 certifications through ABL Group and targets complex, multi-disciplinary projects where scarce specialist expertise (floating offshore wind, subsea cables, foundation engineering, geoscience) is the primary differentiator. The acquisition by ABL Group brought access to broader maritime, oil and gas, and energy transition expertise, and consolidated offshore wind design capability under Longitude, positioning the combined entity as a global powerhouse for renewable energy technical advisory.

Name

INNOSEA

Legal name

OWC

Website

https://innosea.co.uk

Company type

Private

Founded year

2012

Operating status

Acquired

Short description

INNOSEA (now OWC) is a renewable energy consultancy and ABL Group subsidiary providing technical advisory, owner's engineering, and specialised design services to enterprise renewable energy developers across 44+ countries.

Ownership category

akta.pro rank

Product category

Renewable Energy Consulting

NAICS

Engineering Services (54133), Management, Scientific, and Technical Consulting Services (5416)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

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

akta.pro secondary industries

Offshore Wind Project Development & Leasing (EUAMACAB), Advanced Wind Technology R&D (Floating Offshore, Airborne Wind, New Rotor/Blade Concepts) (EUAMAOAB)

Keywords

• Renewable energy consultancy
• Offshore wind engineering
• Technical due diligence
• Owner's engineering services
• Marine renewable energy

Headquarters

HQ city

Nantes

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Technical Advisory and Consultancy Services: Professional consulting services for renewable energy projects spanning technical due diligence, owner's engineering, environmental and consents, and specialized technical studies

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

INNOSEA, now operating as OWC (Offshore Wind Consultants), is an engineering consultancy that delivers technical advisory and consultancy services for renewable energy projects across the full project lifecycle. Core offerings include technical due diligence, owner's engineering, environment and consents support, and specialized technical studies (cable consultancy, electrical engineering, geoscience, wind measurement and metocean advisory, foundation engineering, structural and ocean engineering). The firm serves offshore wind (fixed and floating), onshore wind, solar, energy storage, wave and tidal, and hydrogen sectors.

Product overview

INNOSEA, now rebranded as OWC (Offshore Wind Consultants), operates as the renewable energy consultancy branch of ABL Group. The company offers a comprehensive portfolio of technical advisory and consultancy services for the renewable energy sector, spanning from concept to operations. The offering is organized as a platform of integrated consulting and engineering services including: Technical Due Diligence, Owner's Engineering, Environment and Consents, and specialized Technical Studies (Research and Development, Market Studies, Cable Consultancy, Electrical Engineering, Geoscience, Wind Measurement and Metocean Advisory, Wind and Site Assessment, WTG Engineering, Foundation Engineering, Integrated Loads Analysis & Foundation Design). Engineering services are delivered through Structural Engineering and Ocean Engineering teams. The company serves multiple market sectors: Wind (Fixed Offshore Wind, Floating Offshore Wind, Onshore Wind), Solar (Floating Solar, Ground Mounted Solar, Rooftop Solar), Energy Storage, Wave and Tidal, and Hydrogen. Innosea's structural design and ocean engineering teams have integrated into ABL Group's Longitude brand for consolidated offshore wind design services. The combined entity represents 200+ people across 44+ countries with 350+ GW of wind energy experience.

Differentiator

Problem solved

Functional benefit

Products and services

• Technical Due Diligence Independent technical assessment and validation of project specifications, design, and financial viability for renewable energy projects, used by developers, investors, and lenders to support project financing and investment decisions.
• Owner's Engineering Owner representation services overseeing project execution to ensure technical requirements are met throughout the renewable energy project lifecycle, including offshore wind asset management support.
• Offshore Wind Asset Management Asset management services for offshore wind projects, supporting owners and operators through the operational phase of renewable energy assets.
• Environment and Consents Environmental assessment and regulatory consent services for renewable energy projects, managing compliance with environmental regulations and permitting requirements.
• Research and Development Research and development services supporting innovation in renewable energy technologies and project methodologies.
• Market Studies Market analysis and research services for renewable energy sector opportunities and market positioning.
• Cable Consultancy and Engineering Specialized consultancy and engineering services for subsea and export cable systems used in offshore wind and marine renewable energy projects.
• Electrical Engineering Electrical engineering services for renewable energy projects including array systems, export cables, and grid connection.
• Geoscience Comprehensive geoscience services including geotechnical engineering, geoscience package management, geospatial analysis, geohazard risk assessment, ground models, and operational site supervision.
• Wind Measurement and Metocean Advisory Wind resource measurement and metocean (meteorological and oceanographic) advisory services for wind energy projects.
• Wind and Site Assessment Wind resource assessment and site characterization services for wind energy developments.
• WTG Engineering Wind turbine generator (WTG) engineering services including technical assessment and optimization.
• Foundation Engineering Foundation engineering services for offshore wind structures including jacket, monopile, and floating foundations.
• Integrated Loads Analysis and Foundation Design Combined loads analysis and foundation design services for offshore wind projects.
• Structural Engineering Structural engineering design and analysis services for offshore wind and marine renewable energy structures.
• Ocean Engineering Ocean engineering services for marine renewable energy projects including mooring systems and hydrodynamic analysis.
• Fixed Offshore Wind Services Technical consultancy services specialized for fixed-bottom offshore wind projects.
• Floating Offshore Wind Services Technical consultancy services specialized for floating offshore wind projects including hull design and mooring systems.
• Onshore Wind Services Technical consultancy services for onshore wind energy projects.
• Floating Solar Services Technical consultancy services for floating photovoltaic installations on water bodies.
• Ground Mounted Solar Services Technical consultancy services for ground-mounted solar PV installations.
• Rooftop Solar Services Technical consultancy services for rooftop solar PV installations.
• Energy Storage Services Technical consultancy services for energy storage systems and battery storage projects.
• Wave and Tidal Services Technical consultancy services for wave and tidal energy marine energy conversion devices.
• Hydrogen Services Technical consultancy services for green hydrogen production and hydrogen energy systems.

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Two partnerships are on record, tiered core.

• ABL GroupcoreStrategic or Co-development PartnerOWC (formerly Innosea) is the renewable energy consultancy branch of ABL Group. As of July 2025, Innosea fully integrated into ABL Group, creating a global powerhouse in technical advisory and consultancy supporting renewable energy, environmental, and energy transition technologies from concept to operations.
• Longitude (ABL Group)coreStrategic or Co-development PartnerInnosea's structural design and ocean engineering teams have integrated into ABL Group's design and engineering branch, Longitude, consolidating the global offering in offshore wind design from concept to detailed to installation engineering.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• COWI: Danish engineering consultancy with deep offshore wind foundation and structural design expertise, especially in monopile and jacket design — a direct competitor on offshore wind structural engineering.
• Ramboll: Engineering consultancy with a strong offshore wind foundation design and structural engineering practice, headquartered in Denmark — a direct competitor on foundation engineering, structural design, and owner's engineering mandates.
• AtkinsRéalis: Engineering services firm with nuclear, grid, and offshore wind advisory practices — a broad incumbent competing for owner's engineering and technical due diligence on offshore wind and transmission projects.
• DNV: Global energy advisory and certification body with a leading offshore wind practice offering technical due diligence, owner's engineering, and project certification — directly competing with OWC/Innosea across the offshore wind advisory value chain.
• Wood Group: Global engineering and consultancy firm with a sizable offshore wind advisory and owner's engineering business, competing for technical due diligence and project development support mandates worldwide.
• Mott MacDonald: Engineering consultancy with established offshore wind advisory and cable consultancy practices, competing directly with OWC on owner's engineering, environment & consents, and technical studies.
• WSP: Multidisciplinary engineering services firm with significant offshore wind technical advisory and environment/consents capabilities, directly competing for renewable energy owner's engineering and due diligence work.

Emerging players

• Carbon Trust: Advisory organization supporting offshore wind and marine renewable project development, with overlapping technical advisory and due diligence offerings — particularly on emerging technologies like floating wind and hydrogen.

Broad incumbents

• Bureau Veritas: Global testing, inspection and certification (TIC) company with a renewable energy advisory business covering offshore wind certification and project verification — adjacent competitor on certification-driven mandates.
• ABL Group (parent): Oslo-listed parent company and maritime energy advisory group; OWC/Innosea operates as its renewable energy consultancy branch with cross-sell into marine warranty survey and offshore energy advisory.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/INNOSEA
• LinkedInlinkedin.com/company/offshorewindconsultants

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 INNOSEA