These professional services firms in Normandy include mostly mid-sized companies. The commonest activities are accounting and business consulting, alongside engineering services and IT. Many companies are headquartered in Normandy, with a few in Paris.
Among them, Cerfrance Alliance Centre provides accounting and business management support. CNPP develops risk prevention solutions including cybersecurity. Alpha Maintenance specializes in the oil and energy sector. AntemetA offers expertise in IT infrastructure, cloud computing, and cybersecurity.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Cerfrance Alliance Centrealliancecentre.fr
Provides accounting expertise and business management support to twelve thousand clients across five departments, focusing on sustainable daily performance for entrepreneurs. |
790 | |||
| 2 |
CBRE Francecbre.fr
Offers global corporate real estate advice and services, including sales, leasing, and management of various property types, assisting businesses with their real estate projects. |
685 | |||
| 3 | 601 | ||||
| 4 |
Ceacomnormandie.ceacom.fr
A customer relationship management company based in Le Havre, offering advisory and service jobs, actively involved in professional insertion networks and local events |
521 | |||
| 5 |
Talenz Alteistalenz.fr
Independent firm providing accounting, audit, legal, social, HR, tax optimization, digital solutions, and wealth management services to business leaders. |
400 | |||
| 6 | 369 | ||||
| 7 |
Alpha Maintenancealpha.fr
Company specializing in oil and energy sector, providing services and solutions based in Port-de-Bouc, France. |
333 | |||
| 8 |
AntemetAantemeta.fr
French SME, expertise in IT infrastructure, cloud computing, and cybersecurity since 1995. They help companies transform their information systems. |
310 | |||
| 9 | 227 | ||||
| 10 |
BHNbhn-expertise.com
Seven offices in Normandy and 脦le-de-France providing accounting, audit, tax, social, and wealth management services to diverse businesses. |
198 | |||
| 11 |
SOCAPSsocaps.coop
Global leader in technical assistance and consulting services for various industries worldwide, focusing on skills development, ecological transition, and societal innovations |
189 | |||
| 12 |
DIDAXISdidaxis.fr
Leading payroll solutions provider, enabling entrepreneurship for various professions and skills, supporting 10,000 talents across 54 countries with 100,000 missions. |
180 | |||
| 13 |
APAVE NDT (Non Destructive Testing)apave.com
Specialized in non-destructive testing, inspections, and technical assistance, offering expertise in ensuring safety and quality in various industries |
166 | |||
| 14 |
SOFICOM Walter Francesoficom-walterfrance.com
A leading independent firm in Normandy offering accounting, audit, payroll, legal, and tax services to SMEs and large corporations in various sectors |
149 | |||
| 15 |
Cerfrance Orneorne.cerfrance.fr
Cerfrance is a network of accounting and consulting experts serving 3,500 entrepreneurs across various sectors with personalized guidance for success |
146 | |||
| 16 |
Masselin Energiemasselin-energie.fr
Specializing in electrical and HVAC engineering, MASSELIN Energie offers innovative solutions for buildings, focusing on digitalization, energy efficiency, and sustainability |
143 | |||
| 17 |
Artemys Normandie (groupe Artemys)groupeartemys.com
The company offers a range of digital transformation services, with a focus on infrastructure, Cloud, BI, cybersecurity, and IT project management |
135 | |||
| 18 |
GH Connective | B Corpghconnective.com
This operational consulting firm assists businesses with optimization and transformation projects, covering quality, product development, supply chain, continuous improvement, and management control. |
119 | |||
| 19 |
Groupe DEC, Diagnostic Expertise Conseilgroupe-dec.fr
A group of specialists providing tailored solutions in Accounting, Audit, Legal, and IT services across multiple locations in France |
106 | |||
| 20 |
Agilevaagileva.fr
Agileva has been serving small and medium-sized businesses for over 50 years, providing expertise in accounting and a wide range of associated services |
106 | |||
| 21 | 92 | ||||
| 22 |
Helpeviahelpevia.fr
A team of 70 specialists supports private healthcare facilities in optimizing their purchasing processes through tailored advice and cost-effective solutions |
91 | |||
| 23 |
Nextep hrdominoconsulting.fr
Specialized recruitment and direct approach for various companies, from small businesses to large groups, across diverse sectors for CDD, CDI, and temporary work. |
86 | |||
| 24 |
GSF NEPTUNE OUESTgsf.fr
A leading provider of cleanliness and associated services with a focus on human values and professionalism, operating internationally |
84 | |||
| 25 |
Izi Solutions Habitat, Groupe EDFles-eco-isolateurs.com
Provides comprehensive home energy renovation services including insulation, heat pumps, and ventilation with digital simplicity and expert human support. |
78 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
Parangon Patrimoineparangon-patrimoine.fr
Parangon Patrimoine offers personalized financial solutions to clients, focusing on tax reduction, investment profitability, and optimal financing, seeking individuals with sales skills and a desire for professional growth |
67 | |||
| 27 | 66 | ||||
| 28 |
ATAUB Architectesataub.fr
A dynamic agency with 50+ years experience providing reliable and rigorous architectural services globally, embracing modernization while upholding core values |
63 | |||
| 29 |
Semaforsemafor.fr
A Human Wealth consultancy with over 25 years of experience, emphasizing that employees are more than just a resource for businesses |
55 | |||
| 30 |
IAD Informatiqueiad-bat.com
Specializing in distributing tailored IT solutions for the construction industry since 1989, including SAGE BATIGEST, SAGE COMPTABILITE, and CODIAL |
55 | |||
| 31 |
DESIGN BOXdb-structures.com
Design Box provides excellent structural design services to clients, architects, and contractors, utilizing their in-depth theoretical and practical expertise in material science |
49 | |||
| 32 |
DEVOLISdevolis.com
DEVOLIS is a certified Microsoft partner offering tailored solutions for cloud migration, collaborative tools, app development, Big Data integration, and intelligent bots |
49 | |||
| 33 |
NEWTON EXPERTISEnewtonexpertise.com
NEWTON Expertise is a 40-person company based in Mont-Saint-Aignan, offering expertise in accounting, audit, legal services, and business support for all stages of company life |
47 | |||
| 34 |
Docaposte Agilitydocaposte-agility.fr
Consulting firm driving agile and digital transformation for businesses Specializing in productivity enhancement and change success through tailored solutions and expertise |
45 | |||
| 35 |
TOPO ETUDEStopo-etudes.fr
Specialized in aerial and underground energy distribution network design, topography, mapping, GIS, and non-collective sanitation system studies nationwide. |
45 | |||
| 36 | 42 | ||||
| 37 |
AZNETWORKaznetwork.eu
The company specializes in integrating enterprise solutions to optimize logistical flows, developing components, and providing data center services for improved security |
41 | |||
| 38 |
Actemium Le Havre Process Controlactemium.fr
Specializing in project management, automation, and industrial IT solutions, we enhance efficiency for industrial partners through process expertise and custom software solutions |
34 | |||
| 39 |
Groupe 6NAPSE6-napse.com
Engineering expertise providing numerical simulation, qualification tests, material analysis, and failure expertise for industrial sectors like aeronautics, automotive, and medical device development. |
30 | |||
| 40 |
ATELIER LDatelierld.com
Innovative urban planning solutions with a multidisciplinary team of engineers, landscapers, urban planners, and architects focusing on environmental quality and user benefit |
30 | |||
| 41 |
ACE Serviceattineos.com
Established in 2001, this company specializes in information systems security, with a focus on proactive monitoring and technological innovation for clients |
30 | |||
| 42 |
FeelAgilefeelagile.com
Provider of simple, reliable, and automated cybersecurity certification solutions for SMEs, TPEs, and Startups Offering global cybersecurity solutions to meet market standards |
29 | |||
| 43 |
FIDUTECH CONSEILSfidutech-conseils.fr
FIDUTECH CONSEILS supports entrepreneurs with personalized services in accounting, tax, legal, and wealth management, primarily in the Caen region and Normandy |
28 | |||
| 44 |
CAP EXPERTISE
A company located in Le Petit Quevilly offering expertise services in an unspecified field |
28 | |||
| 45 |
Cabinet BLOISbloisaudit.fr
Accounting firm with locations in 脡vreux, Vernon, Louviers, Le Neubourg, Etrepagny, Gaillon, Nice, and Grasse Family-owned with 65 employees focused on local economy |
27 | |||
| 46 |
S&you Francesandyou.fr
International recruitment firm specialized in expert and executive roles. Consultants provide expertise across business, technical, and support sectors, fostering trust with candidates and clients. |
26 | |||
| 47 |
ABEXEbizouard.com
An accounting firm located in Le Havre, France, specializing in providing financial services and support to businesses and individuals |
26 | |||
| 48 |
CDH EXTENSEcdhexpertises.com
Expertise, consulting, and training company specializing in agri-food, environmental, health, animal production, and agriculture risk management Trusted partner for insurance and businesses worldwide |
25 | |||
| 49 |
Cabinet Longuemart Conseils et Associ茅scab-longuemart.fr
A team of two chartered accountants and 20 staff in downtown Rouen offer accounting, auditing, legal services, and business support |
25 | |||
| 50 |
SFPN - Cabinet d'expertise comptablesfpn-expert-comptable-bayeux.fr
SFPN is a dynamic team providing accounting, tax, legal services, and assistance with funding, budgeting, and legal structure selection for various businesses |
25 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.
More company lists in Normandy
- The largest companies in Normandy 2,380
- Manufacturers in Normandy 245
- Retail chains in Normandy 244
- Companies with in-house R&D in Normandy 227
- Multinational companies in Normandy 216
- Public sector organisations in Normandy 166
- Hardware manufacturers in Normandy 135
- Family-owned companies in Normandy 135
- Distributors and wholesalers in Normandy 128
- Critical infrastructure operators in Normandy 103
- Contract manufacturers in Normandy 101
- Education providers in Normandy 100
- Government Administration companies in Normandy 93
- Construction companies in Normandy 92
- Industrial Machinery Manufacturing companies in Normandy 81
- Healthcare providers in Normandy 80
- Food and Beverage Manufacturing companies in Normandy 77
- IT services companies in Normandy 77
- Retail companies in Normandy 75
- Real Estate companies in Normandy 68
- IT Services and IT Consulting companies in Normandy 65
- Logistics companies in Normandy 65
- Events Services companies in Normandy 62
- Software Development companies in Normandy 60
The same list elsewhere in France
- Professional services firms in France 6,611
- Professional services firms in 脦le-de-France 3,377
- Professional services firms in Auvergne-Rh么ne-Alpes 711
- Professional services firms in the Hauts-de-Seine department 629
- Professional services firms in Provence-Alpes-C么te d'Azur 433
- Professional services firms in the Rh么ne department 400
- Professional services firms in Occitanie 399
- Professional services firms in Grand Est 316
- Professional services firms in Nouvelle-Aquitaine 308
- Professional services firms in Hauts-de-France 260
- Professional services firms in Pays de la Loire 254
- Professional services firms in the Bouches-du-Rh么ne department 249
- Professional services firms in the Haute-Garonne department 208
- Professional services firms in the Nord department 178
- Professional services firms in Brittany 167
- Professional services firms in the Loire-Atlantique department 158
- Professional services firms in the Gironde department 151
- Professional services firms in the Yvelines department 108
- Professional services firms in the Ille-et-Vilaine department 94
- Professional services firms in Paris 2,241
- Professional services firms in Lyon 265
- Professional services firms in Toulouse 139
- Professional services firms in Marseille 123
- Professional services firms in Boulogne-Billancourt 102