Gantha

What Gantha does

Gantha is a French acoustic, vibration and fluid-mechanics engineering consultancy headquartered in Poitiers, with regional agencies in Bordeaux, Nantes (Saint-Herblain), Lyon and Saint-Ouen (Île-de-France). The firm operates five service lines — architectural acoustics, environmental acoustics, industrial acoustics, vibrations, and fluid mechanics/CFD plus indoor air quality — delivering compliance studies, impact assessments, feasibility analyses and post-construction validation measurements to public project owners, industrial operators, event organizers and engineering firms. Named engagements span wind farm acoustic studies for SERGIES, road noise modeling for Bordeaux Métropole (Rocade) and Conseil Départemental de la Mayenne (RD34), acoustic and vibration validation for the Lescure bus depot renovation with Brochet Lajus Pueyo architects, festival sound-system optimization for the Ville de Bordeaux, and aero-acoustic CFD studies for a Noyon data center operator.

The technical stack is built on specialized third-party modeling tools and proprietary measurement assets. GANTHA deploys a fleet of approximately 50 simultaneous Class 1 sound level meters with anemometers, 5 weather stations, 120 batteries and 2 weather masts, used in combination with SoundPlan, CSTB Mithra SIG/Sound, Code_Aster FEM and OpenFOAM-based CFD. Differentiated methodologies include meteorological acoustic propagation modeling beyond standard regulatory assumptions, 3D wind-turbine directivity characterization via tethered-balloon sound level meters (cited to reduce modeling error by ~40%), finite-element vibratory modeling for microelectronics facilities, and integrated aero-acoustic CFD analysis for data centers. The consultancy is OPQIBI certified, periodically re-assessed through client feedback.

GANTHA is organized as a SARL and has been part of the ARTELIA Group since 2020, sharing software licenses, measurement capabilities and acoustic engineering talent with Artelia's MOE team. Revenue is project-based professional services income billed to public and private clients via direct engagement, tenders and sub-consultant roles with architecture and project-management firms (e.g., Artelia VT Ouest, Brochet Lajus Pueyo). The company does not disclose revenue publicly; headcount was approximately 26 collaborators as recorded by a 100%-participation 2025 employee survey, with 5 additional positions planned for 2026.

Name

Gantha

Legal name

SARL Gantha

Website

https://gantha.fr

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

Gantha is a French acoustic, vibration and fluid-mechanics engineering consultancy delivering impact studies, compliance assessments and CFD analysis to public authorities, industrial operators, event organizers and developers through five regional offices as part of ARTELIA Group.

Ownership category

akta.pro rank

Product category

Acoustic and Vibration Engineering Services

NAICS

Architectural, Engineering, and Related Services (5413), Environmental Consulting Services (541620)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Sustainable/Green Building & LEED Consulting (BPAHAKAG)

akta.pro secondary industry

Air Quality & Emissions Management (BPAHAJAI)

Keywords

• Acoustic engineering consultancy
• Environmental noise studies
• Vibration impact assessment
• Fluid mechanics CFD
• Industrial noise control

Headquarters

HQ city

Poitiers

HQ country

France

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Acoustic Engineering Consultancy Services: GANTHA generates revenue through professional engineering consultancy fees for acoustic, vibration, and fluid mechanics studies. Services are billed on a project basis to public and private clients including project owners, architects, engineering firms, industrial operators, and local authorities. Services span regulatory compliance studies, impact assessments, pre-project feasibility, and post-construction validation measurements.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels6 records

Core offering

Gantha is an OPQIBI-certified acoustic, vibration, and fluid mechanics engineering consultancy that delivers measurement campaigns, predictive modeling (SoundPlan, CSTB Mithra, Code_Aster, OpenFOAM), and regulatory impact assessments for buildings, infrastructure, industrial sites, wind farms, data centers, and outdoor events. Services span architectural acoustics, environmental noise, industrial acoustics, vibration studies, CFD/fluid mechanics, and indoor air quality, sold primarily on a project basis to public and private clients.

Product overview

Gantha is an engineering consulting firm providing specialized services in acoustic studies, vibrations, and fluid mechanics. The company operates as a single integrated service offering across five core practice areas: Architectural Acoustics (acoustic isolation, reverberation, compliance), Environmental Acoustics (road/rail/aircraft/industrial noise), Industrial Acoustics (machinery noise, data centers), Vibrations (structural vibration, equipment protection), and Fluid Mechanics/CFD (thermal comfort, air quality, fire simulation). These services are delivered through their engineering teams using specialized software tools for modeling and measurement. Gantha is OPQIBI certified and operates as part of the Artelia Group.

Differentiator

Problem solved

Functional benefit

Products and services

• Architectural Acoustics (Acoustique Architecturale) Acoustic consulting for buildings covering acoustic isolation, reverberation control, building facade classification, RE2020 attestation, and comfort studies for residential, hotel, and commercial new construction and renovation projects, targeting public and private project owners, developers, and hotel operators.
• Environmental Acoustics (Acoustique Environnementale) Environmental noise studies including road traffic, railway, aircraft, and wind turbine noise impact assessments, ICPE compliance studies, and European Directive 2002/49/EC strategic noise mapping, delivered to public authorities, industrial operators, and infrastructure managers.
• Industrial Acoustics (Acoustique Industrielle) Industrial noise control including machinery noise assessment, pump and transformer noise studies, heat pump noise studies, data center acoustic licensing work, and compliance with French ICPE regulations for industrial and energy operators.
• Vibrations Impact Studies Vibration impact studies for buildings near railways, metro, and road infrastructure; industrial machinery isolation; and protection of vibration-sensitive microelectronics and laboratory equipment, using Code_Aster finite element modeling and field measurement campaigns.
• Fluid Mechanics / CFD (Mécanique des Fluides) Computational Fluid Dynamics (CFD) simulations using OpenFOAM for thermal comfort, indoor air quality, cleanroom airflow, fire simulation, aerodynamic analysis, and coupled aero-acoustic analysis for data centers, targeting building, industrial, and energy clients.
• Indoor Air Quality (Qualité de l'air intérieur) Indoor air quality assessment and CFD-based analysis for compliance with French ERP (Établissement Recevant du Public) regulations and thermal comfort optimization in buildings, delivered to project owners and facility operators.

Quantifiable outcome

• Reduction of 10–15 dB in perceived sound levels at festival property boundaries through optimized subwoofer directivity configurations
• +3 more outcomes

Named customers7 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered core and minor.

• ARTELIA GroupcoreStrategic or Co-development PartnerARTELIA Group acquired GANTHA to complement its engineering services portfolio with specialized acoustic and fluid mechanics expertise. GANTHA operates alongside ARTELIA's MOE (Maîtrise d'Œuvre) acoustic engineering team, sharing software tools, measurement capabilities, and collaborating on railway noise and vibration projects. The acquisition reinforced ARTELIA's environmental engineering offering.
• SERGIES (Groupe SOREGIES)coreStrategic or Co-development PartnerSERGIES, a renewable energy company owned by 265 municipalities of Vienne department, partnered with GANTHA for wind farm acoustic studies, including repowering impact assessments. GANTHA conducted 3D acoustic directivity measurements and impact studies for SERGIES wind farms. SERGIES produces 360 GWh of renewable energy including 250 GWh from 114 MW of operational wind farms.
• CSTB (Centre Scientifique et Technique du Bâtiment)coreTechnology or IntegrationGANTHA collaborates with CSTB using Mithra SIG and Mithra Sound software for meteorological acoustic propagation modeling. CSTB developed an advanced tool for modeling specific meteorological scenarios that GANTHA applies to road noise studies (e.g., Bordeaux Rocade). CSTB also partnered with GANTHA for urban soundscape improvement projects with Bordeaux Métropole and La Fabrique de la Cité.
• Artelia VT OuestminorImplementation/ SI/ Consulting PartnerArtelia VT Ouest leads environmental impact studies for road infrastructure projects (e.g., RD34 widening in Mayenne) and incorporates GANTHA's acoustic expertise for the noise assessment component of environmental impact studies.
• Brochet Lajus Pueyo (BLP)minorImplementation/ SI/ Consulting PartnerBLP architecture firm leads the Lescure bus depot renovation project in Bordeaux and partnered with GANTHA for acoustic and vibration validation services to ensure noise, vibration, and odor control for neighboring residents.

Scale indicators6 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• SGS France: SGS is a global TIC group with environmental and acoustic services in France. It overlaps with GANTHA on industrial noise and environmental compliance mandates as part of a much larger service portfolio.
• Apave Group: Apave is a major French testing, inspection, and certification group with acoustics, vibration, and environmental service lines. It competes with GANTHA on industrial and infrastructure acoustic mandates but as part of a much broader TIC portfolio.
• Ramboll: Ramboll is a European engineering consultancy with a strong acoustics practice (Ramboll Acoustics) serving buildings, transport, and environmental projects. It overlaps with GANTHA on cross-border infrastructure and environmental noise mandates, particularly for European-funded projects.
• Bureau Veritas: Bureau Veritas is a global TIC leader with acoustic measurement, environmental, and building compliance services in France. It competes with GANTHA on large industrial and infrastructure tenders but operates at a vastly larger scale and broader scope.
• WSP France: WSP is a global engineering consultancy with environmental acoustics, vibration, and building services capabilities in France. It competes with GANTHA on large multidisciplinary mandates where acoustic studies are bundled into broader project scopes.
• Artelia Group: Artelia is GANTHA's parent company and a major European engineering consultancy with its own MOE acoustic engineering team. Artelia competes with other independent acoustic consultancies for prime mandates and shares the French acoustic services market with GANTHA internally.

Direct peers

• ORFEA Acoustique: ORFEA Acoustique is a France-based acoustic engineering consultancy providing environmental, architectural, and industrial acoustics services with multiple regional offices. It is the closest direct peer to GANTHA, competing for the same French tenders in wind farm, infrastructure, and building acoustics.
• Acoustique Bietrix: Acoustique Bietrix is a French acoustic engineering consultancy offering architectural, environmental, and industrial acoustics. As a similarly sized specialist firm operating in France, it competes head-to-head with GANTHA for the same OPQIBI-certified mandates.
• Sixense Engineering (VINCI Construction): Sixense is the engineering subsidiary of VINCI Construction specializing in measurement, monitoring, and acoustic/vibration consulting for infrastructure projects. It competes with GANTHA on transportation noise mapping, vibration monitoring, and large engineering mandates, with the backing of VINCI's project pipeline.

Others

• CSTB (Centre Scientifique et Technique du Bâtiment): CSTB is a French public research center that develops the Mithra acoustic modeling tools GANTHA uses and co-hosts webinars with GANTHA. It is not a direct competitor but a critical technology and ecosystem partner whose licensing decisions directly shape GANTHA's methodological edge.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/gantha

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 Gantha