The 30 largest professional services firms in the Calvados department (2026 list)

This selection of professional services firms in Calvados includes a mix of accounting, environmental, and engineering companies. Notable firms include Talenz Alteis, an independent accounting, audit, and wealth management firm; SOFICOM Walter France, offering accounting, audit, payroll, and tax services; Masselin Energie, specializing in electrical and HVAC engineering; and VIRIA, providing energy efficiency services for buildings. The list also features ELITT, which specializes in secure electronic transactions, and Parangon Patrimoine, offering personalized financial solutions.

A clear pattern among these companies is their strong concentration in Caen, which serves as the headquarters for many of the largest firms such as Talenz Alteis, SOFICOM Walter France, and Agileva. The companies range from well-established firms like Masselin Energie, founded in 1924, to newer entities such as GSF NEPTUNE OUEST, established in 2020.

#	Company	Industry	Headquarters	Employees	Founded
1	Talenz Alteis talenz.fr Independent firm providing accounting, audit, legal, social, HR, tax optimization, digital solutions, and wealth management services to business leaders.	Accounting	🇫🇷 Caen	400	n/a
2	SOFICOM Walter France soficom-walterfrance.com A leading independent firm in Normandy offering accounting, audit, payroll, legal, and tax services to SMEs and large corporations in various sectors	Accounting	🇫🇷 Caen	149	1968
3	Masselin Energie masselin-energie.fr Specializing in electrical and HVAC engineering, MASSELIN Energie offers innovative solutions for buildings, focusing on digitalization, energy efficiency, and sustainability	Facilities Services	🇫🇷 Ifs	143	1924
4	Agileva agileva.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	Accounting	🇫🇷 Caen	106	1980
5	VIRIA viria.fr Energy efficiency services for buildings, including energy management, equipment maintenance, installation, and environmental compliance solutions across various fuel types.	Environmental Services	🇫🇷 Caen	92	1963
6	GSF NEPTUNE OUEST gsf.fr A leading provider of cleanliness and associated services with a focus on human values and professionalism, operating internationally	Environmental Services	🇫🇷 Caen	84	2020
7	Parangon Patrimoine parangon-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	Investment Management	🇫🇷 Deauville	67	2001
8	ELITT elitt.com A B-to-B service company specializing in secure electronic transactions, offering expertise in evaluation, consultancy, and audit for various industries	Banking	🇫🇷 Colombelles	66	2008
9	TOPO ETUDES topo-etudes.fr Specialized in aerial and underground energy distribution network design, topography, mapping, GIS, and non-collective sanitation system studies nationwide.	Research Services	🇫🇷 Lisieux	45	1990
10	FIDUTECH CONSEILS fidutech-conseils.fr FIDUTECH CONSEILS supports entrepreneurs with personalized services in accounting, tax, legal, and wealth management, primarily in the Caen region and Normandy	Accounting	🇫🇷 Fleury-sur-Orne	28	1993
11	SFPN - Cabinet d'expertise comptable sfpn-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	Accounting	🇫🇷 Bayeux	25	1975
12	Référence Expertise Groupe Référence Expertise specializes in automotive expertise with over 200 employees across 3 regions, offering services in collision management, technical support, and quality assurance	Information Services	🇫🇷 Hérouville-Saint-Clair	17	2006
13	COGEDIAC cogediac.com COGEDIAC specializes in audit, accounting, consulting, and social support, offering a wide range of services including association support, public sector entities, group consolidations, and more	Accounting	🇫🇷 Caen	16	1993
14	IBATEC Structure ibatec.fr Specialized in structural calculations for reinforced concrete, wood, and metal, this technical engineering firm in Basse-Normandie offers a wide range of services from design to execution	Civil Engineering	🇫🇷 Caen	13	1999
15	GESTELIA BASSE NORMANDIE Legal services company in Normandie, France, providing legal assistance and support from their office in Caen	Legal Services	🇫🇷 Caen	11	n/a
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16	ACR HUISSIERS huissier-caen-acr.fr ACR HUISSIERS is a legal services provider located in Caen, Normandie, France, specializing in serving legal documents and enforcing court orders	Legal Services	🇫🇷 Caen	10	n/a
17	AF TELECOMS aftelecoms.fr AF Télécoms is an independent consulting company offering customized telecom solutions to professionals, from audits to implementation and maintenance, with a focus on cost-effectiveness and expertise	Telecommunications	🇫🇷 Ranville	9	2013
18	AIDES & FINANCEMENTS aides-financements.fr Aides & Financements helps businesses secure public and private funding for various projects like investments, innovation, recruitment, and expansion through tailored financial strategies	Business Consulting and Services	🇫🇷 Carpiquet	9	2012
19	MOINS EGAL PLUS moinsegalplus.net A human-sized team dedicated to supporting business projects in various fields, offering accounting, legal, management, and strategic development services	Accounting	🇫🇷 Saint-Contest	9	2014
20	CAC 14 - Conseils et Audit Caennais cac14.fr CAC14 is a accounting firm in Caen, led by experts with over 30 years of experience They offer a wide range of services to assist clients with various business needs	Accounting	🇫🇷 Caen	9	2004
21	NEPSEN BATIMENT Caen nepsen.fr NEPSEN is an independent consulting and engineering firm specialized in energy transition, supporting public and private sector clients in sustainable and energy-efficient projects	Renewable Energy Semiconductor Manufacturing	🇫🇷 Ifs	7	2010
22	H2C Cabinet RH h2c.fr Specializing in career development and coaching, this company helps individuals and teams achieve success through listening, ethics, innovation, and support in facing future changes	Human Resources Services	🇫🇷 Sallenelles	7	2000
23	CBE EXPERTISE A small-sized company specializing in Accounting and Consulting services, leveraging over 20 years of experience through a network of consultants and partners nationwide	Accounting	🇫🇷 Bayeux	7	2015
24	AREHA - Bureau d'Etudes Thermique & Fluides areha.fr A building thermal & fluid engineering firm offering energy optimization services, studies, audits, and advice including RE2020 thermal studies and carbon LCA	Construction	🇫🇷 Caen	6	2007
25	TEMPS PRIVE tempsprive.fr Specializing in consulting, coaching, and professional training for executives, managers, and leaders, focusing on improving team performance, talent identification, training, and coaching for career development	Business Consulting and Services	🇫🇷 Caen	6	n/a
26	Incendis incendis.fr A professional firefighter training organization in Normandy, specializing in safety and prevention training tailored to each company's needs to reduce workplace accidents and illnesses	Professional Training and Coaching	🇫🇷 Mondeville	6	2017
27	ASSI reso-ing.fr Specialized in Fire Safety, ASSI provides services such as SSI coordination, fire safety engineering, diagnostics, evacuation plans, and training for public, commercial, and industrial buildings	Research Services	🇫🇷 Colombelles	5	2006
28	ACTIVE INGENIERIE active-ingenierie.fr An architecture and planning company located in Colombelles, France, specializing in engineering solutions for various projects	Architecture and Planning	🇫🇷 Colombelles	5	2016
29	KRIBS CONSEILS PATRIMOINE kribsconseils.com A Caen-based company specializing in personalized financial, tax, and legal advisory services for business leaders, offering tailored solutions independently from financial groups	Financial Services	🇫🇷 Caen	5	2017
30	EXITEAM exiteam.fr Providing consulting and expertise services in IT security to safeguard businesses from potential cyber threats and vulnerabilities	Computer and Network Security	🇫🇷 Lisieux	4	2010

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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.

The 30 largest professional services firms in the Calvados department

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