Geosynthèse

What Geosynthèse does

Geosynthèse is a French technical engineering firm (bureau d'études techniques) founded in 2008 and headquartered in the Paris region (legal entity registered under Stelliant SAS at Tour Légende, Puteaux). The company specializes in post-disaster repair engineering — acting as a master builder (maître d'œuvre) for insured properties from technical diagnosis through repair design, contractor selection, and construction oversight to final acceptance. It operates across three integrated service domains: applied geotechnics (slope stabilization, underpinning, soil treatment, stormwater management), structural and superstructural engineering (reinforced concrete, steel, mixed structures, seismic and tanking/cuvelage works), and all-trade repair (facades/cladding, glass structures, flooring, coatings, waterproofing). Geosynthèse serves insurance companies, insurance experts, property portfolio managers, and large property owners (maîtres d'ouvrage) with missions commissioned directly by insurers or appointed experts, primarily for complex or high-stakes claims such as drought-induced ground movement, structural collapses, water infiltration, and geotechnical failures.

The firm deploys advanced technical tooling including finite element modeling (PLAXIS 2D and 3D), non-destructive investigation (ferroscan, ground-penetrating radar), 3D laser scanning, optical and thermal drone imaging, and computational fluid flow modeling to support site condition simulation pre- and post-reconstruction. It maintains a lean technical team of approximately 20 collaborators including 16 engineers, distributed across five regional agencies in France (Île-de-France, PACA, Normandie, Sud-Ouest, and Rhône Alpes) to enable rapid national field dispatch. Revenue is generated through mission-based professional services fees negotiated with insurers, insurance experts, and property owners — no public pricing is disclosed.

Commercially, Geosynthèse operates a direct enterprise field-sales motion with no reseller or self-serve channel. Since joining the Stelliant Group in 2020 — a diversified insurance and property services conglomerate — it has served as the group's specialized post-disaster repair engineering arm. The company publicly reports revenue doubled in 2021 (absolute figure not disclosed), signals a deliberate scaling trajectory under its parent, and uses its website and LinkedIn presence to publish technical case studies targeting insurer and construction audiences.

Name

Geosynthèse

Legal name

GEOSYNTHESE

Website

https://geosynthese.fr

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

11–50 employees

Short description

Geosynthèse is a French technical engineering consultancy acting as a master builder for post-disaster repair. It serves insurers, insurance experts, property portfolio managers, and large property owners with geotechnical, structural, and all-building-trades engineering from diagnosis through construction oversight.

Ownership category

akta.pro rank

Product category

Post-disaster repair engineering services

NAICS

Engineering Services (54133), Architectural, Engineering, and Related Services (5413), Geophysical Surveying and Mapping Services (54136)

SIC

Services-Engineering Services (8711)

akta.pro industry

PRIMARYBPAHAIAB

Geotechnical & Subsurface Engineering Consulting

Business & Public Services/Professional Services (Legal, Accounting, Consulting)/Engineering & Technical Consulting

SECONDARYIMAFAOAK

Geotechnical Design, Engineering & Consulting (Analysis, Design, Peer Review)

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Geotechnical & Foundation Engineering (Piling, Ground Improvement)

SECONDARYEUAHAFAE

Geotechnical Site Investigation & Engineering Geology (Borings, Lab Testing)

Energy, Utilities & Environment/Environmental Compliance, Monitoring & Consulting/Site Assessment & Hydrogeology (Groundwater/Geotechnical)

SECONDARYIMAFAOAG

Geotechnical Investigation & Site Characterization (Boreholes, In-situ Testing, Lab Testing)

Industrials, Manufacturing & Construction/Construction & Civil Engineering/Geotechnical & Foundation Engineering (Piling, Ground Improvement)

Keywords

• Post-disaster repair engineering
• Construction claims management
• Geotechnical engineering services
• Structural repair consulting
• Building reconstruction services

Headquarters

HQ city

Puteaux

HQ country

France

HQ region

Europe

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Ingénierie de réparation post sinistre: Bureau d'études techniques providing master builder services (maître d'œuvre) for post-disaster repair engineering. Revenue is generated through technical consulting fees for diagnostic missions, repair design, construction oversight, and project management services for insurers and property owners. Services are project-based and mission-driven.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Geosynthèse is a technical engineering bureau (bureau d'études techniques) operating as a master builder (maître d'œuvre) that delivers post-disaster repair engineering for insured properties. The company conducts field diagnostics, designs repair solutions, selects and negotiates with contractors, and oversees construction through final acceptance. Its services cover three integrated domains: applied geotechnics, structures and superstructures, and all building trades (tout corps d'état).

Product overview

Geosynthèse is a technical engineering firm (bureau d'études technique) that operates as a master builder and post-disaster repair solutions provider. The company offers three integrated service domains: (1) Géotechnique appliquée for geotechnical engineering and ground stabilization, (2) Structures et superstructures for structural analysis and repair, and (3) Tout corps d'état for comprehensive building envelope and finishing work. These complementary service lines enable Geosynthèse to deliver turnkey repair solutions from diagnostic assessment through construction oversight and project reception.

Differentiator

Problem solved

Functional benefit

Products and services

• Géotechnique appliquée (Applied geotechnical engineering) Applied geotechnical engineering services for post-disaster repair, covering slope stabilization, underpinning (reprises en sous-œuvre), soil treatment, roadway repair, and stormwater/groundwater management. Delivered by Geosynthèse's geotechnical engineers to insurers, insurance experts, property portfolio managers, and large property owners handling damaged properties.
• Structures et superstructures (Structural and superstructural engineering) Structural and superstructural engineering services for post-disaster repair, including reinforced concrete, timber, metal and mixed-structure analysis, seismic load calculations, foundation repair, and waterproofing/cuvelage in line with DTU 14.1. Provided to insurance and construction-industry clients managing damaged properties.
• Tout corps d'état (All building-trades services) All-trades building envelope and finishing services for post-disaster reconstruction, covering cladding and façade repair, roller shutters, glass structures and verrières, industrial resin flooring, surface coatings, and watertight basin coatings. Delivered as part of Geosynthèse's integrated repair mission scope for insurance and property-owner clients.

Named customers4 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Stelliant GroupecoreOthers · 1 January 2020Géosynthèse joined the Stelliant Group in 2020. Stelliant is a SAS (Société par Actions Simplifiée) headquartered at Tour Légende, 20 Place de la Défense, 92800 Puteaux, France, with share capital of €103,287,348 and registered under RCS Paris 820 803 484. President: Benjamin Bouffard. The acquisition enables Stelliant to offer high-level post-disaster repair engineering expertise to its insurer and property owner clients.

Scale indicators4 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• FONDASOL: French geotechnical engineering firm specialized in soil studies, foundation diagnostics, and ground-related consulting for construction and infrastructure. Closely comparable in geotechnical DNA, with overlap in insurer-, property-, and infrastructure-driven assignments involving subsurface diagnostics.
• Ginger Group: French geotechnical and environmental engineering consultancy offering site investigation, soil studies, foundation diagnostics, and infrastructure-related engineering services. Direct peer to Geosynthèse on the geotechnical and subsurface engineering side, particularly relevant for post-disaster ground investigation and repair design missions.
• Setec Group: French engineering consultancy with strong structural, geotechnical, and infrastructure practices. Comparable to Geosynthèse in structural and geotechnical engineering depth, and competes on complex post-disaster repair design and project management mandates.
• Soletanche Bachy: Leading French-founded geotechnical contractor specialized in foundations, ground improvement, and underground works. Comparable on the geotechnical stabilization side of Geosynthèse's offering (reprises en sous-oeuvre, traitement de sols, stabilisation d'ouvrage), although more contractor and less maître d'œuvre/consultancy.

Broad incumbents

• Apave: Major French TIC and risk-management group active in construction, infrastructure, and asset integrity. Competes for insurer-mandated technical diagnostics, structural assessments, and post-event repairs with a broader portfolio that includes training, inspection, and certification.
• Egis: Major French engineering group covering infrastructure, buildings, and project management with capabilities in geotechnical, structural, and construction engineering. Tangentially competes with Geosynthèse on complex post-disaster repair design and project management missions, particularly for large public and corporate maîtres d'ouvrage.
• Bureau Veritas: Global TIC giant with significant French construction-services activity, including post-construction verification and asset integrity services. Competes with Geosynthèse for insurer-driven inspections and structural condition assessments, particularly in framework agreements with large insurers and public/private property owners.
• SOCOTEC: One of France's largest testing, inspection, and certification (TIC) groups with deep relationships across French insurers, construction firms, and property owners. Overlaps Geosynthèse in insurance-led construction diagnostics and verification but operates at very different scale and breadth, competing for similar panel mandates.
• Antea Group: International environmental, water, and infrastructure engineering consultancy with strong French operations. Overlaps Geosynthèse on site assessment, hydrogeology, and post-incident environmental/geotechnical investigation work for insurers and property owners.

Others

• Cabinet d'Expertise en Assurance (e.g., Ginger Leibovici / Qualiconsult Expertise): French insurance-expert firms that work upstream of Geosynthèse by commissioning structural and post-disaster diagnostic missions. While not direct competitors, they form the same workflow with insurers and are a key upstream channel/relationship set for Geosynthèse's mission pipeline.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/géosynthèse

Compliance1 record

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 Geosynthèse