# Top 26 professional services firms in the Charente-Maritime department
Tamtam tracks 26 professional services firms headquartered in the Charente-Maritime department. This list ranks all of them by number of employees on LinkedIn, led by CGO Expertise comptable & Conseil, Exco Valliance and FIMECO Walter France. Their median headcount is 17. Half of them were founded in 2007 or later. The most common headquarters are La Rochelle (11), Saintes (5) and P茅rigny (2).
The professional services firms in Charente-Maritime are primarily focused on accounting and financial services. Companies like CGO Expertise comptable & Conseil, Exco Valliance, and FIMECO Walter France offer comprehensive accounting, auditing, and consulting services. NOT'ATLANTIQUE provides legal services, while ID Groupe specializes in wealth management.
The firms listed largely comprise established mid-sized companies, with many founded before 2000. While accounting and financial services are dominant, there is also a presence of IT services through companies like KEPIoT and EUROCAP, and human resources with GRH & AUDIT. Most of these firms are headquartered in key urban centers like La Rochelle, Saintes, and Fontcouverte.
馃嚝馃嚪 Charente-Maritime 路 26 companies 路 Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [CGO Expertise comptable & Conseil](https://www.tamtam.ai/c/cgo-expertise-comptable-and-conseil) (groupecgo.fr)
Providing accounting, business consulting, tax, social, payroll, legal, wealth management, and agro-environmental services for entrepreneurs across the southwestern region for over forty years. | Accounting | 馃嚝馃嚪 Fontcouverte | 256 | 1987 |
| 2 | [Exco Valliance](https://www.tamtam.ai/c/exco-valliance) (exco.fr)
Accounting, auditing, and consulting services supporting entrepreneurial initiatives, business development, and management optimization across France, Poland, and Portugal through an international independent network. | Accounting | 馃嚝馃嚪 P茅rigny | 221 | 2002 |
| 3 | [FIMECO Walter France](https://www.tamtam.ai/c/fimeco-walter-france) (fimeco-walter-allinial.com)
A multidisciplinary group providing business services including accounting, auditing, consulting, social, legal, financial management, and training for entrepreneurs and businesses | Accounting | 馃嚝馃嚪 Saintes | 147 | 1965 |
| 4 | [NOT'ATLANTIQUE](https://www.tamtam.ai/c/not-atlantique) (notatlantique.fr)
A major player in the notarial profession in Charente-Maritime, offering expertise in general notarial law, complex real estate, family estate planning, business law, and rural law | Legal Services | 馃嚝馃嚪 La Rochelle | 92 | |
| 5 | [ID Groupe](https://www.tamtam.ai/c/id-groupe) (idgroupe.fr)
The company provides comprehensive services for personal and professional wealth management, including insurance, real estate, retirement planning, and financial investments | Financial Services | 馃嚝馃嚪 Lagord | 69 | 2004 |
| 6 | [Groupe Excel La Rochelle](https://www.tamtam.ai/c/groupe-excel-la-rochelle) (groupe-excel-larochelle.fr)
Accounting, auditing, payroll, and consulting services for entrepreneurs, companies, and associations with a dedicated, experienced team. | Accounting | 馃嚝馃嚪 La Rochelle | 38 | 1979 |
| 7 | [GRH & AUDIT - Externalisation Paie](https://www.tamtam.ai/c/grh-and-audit-externalisation-paie) (grhaudit.com)
Consulting firm providing payroll outsourcing, payroll management, and tailored solutions for businesses and accountants across France and internationally. | Human Resources Services | 馃嚝馃嚪 Puilboreau | 36 | 2007 |
| 8 | [ABP Architectes](https://www.tamtam.ai/c/abp-architectes) (abp-architectes.com)
Architecture and urban planning agency with design services, headquartered in La Rochelle and Paris, offering comprehensive architectural solutions | Architecture and Planning | 馃嚝馃嚪 La Rochelle | 29 | 2001 |
| 9 | [KEPIoT - INDUSTRY 4.0](https://www.tamtam.ai/c/kepiot-industry-4-0) (kepfrance.fr)
Specializing in Control / Command since 1993, KEPIoT enhances digital transformation with agile methods, product solutions, and Industry 40 services for global manufacturing units | IT Services and IT Consulting | 馃嚝馃嚪 Aytr茅 | 26 | 1993 |
| 10 | [FGM International](https://www.tamtam.ai/c/fgm-international) (fgm-agriculture.com)
Design, development, and operational management of large-scale farming projects with strategic advice, site assessment, feasibility studies, and farm management services. | Farming | 馃嚝馃嚪 Saint-Jean-d'Ang茅ly | 25 | |
| 11 | [Groupe Fiduroc](https://www.tamtam.ai/c/groupe-fiduroc) (crowe.com)
A multi-site accounting firm founded in 1958, providing expertise, auditing, and advisory services in La Rochelle, Surg猫res, and F茅rri猫res to clients, with around 40 collaborators | Accounting | 馃嚝馃嚪 La Rochelle | 25 | 1958 |
| 12 | [EUROCAP](https://www.tamtam.ai/c/eurocap) (eurocap.pro)
Since 1999, EUROCAP advises and supports professionals in their Digital Transformation (IoT, interconnection, audit, solutions) to stay competitive in the market | IT Services and IT Consulting | 馃嚝馃嚪 La Rochelle | 19 | 1999 |
| 13 | [Cabinet Guillemet - AGT - TERRAMAP](https://www.tamtam.ai/c/cabinet-guillemet-agt-terramap) (agt-geometre.com)
A geomatics firm offering land surveying, land development, topographic mapping, utility detection, urban planning services with over 35 years of experience | Engineering Services | 馃嚝馃嚪 Saintes | 17 | 2014 |
| 14 | [Parfum Marketing](https://www.tamtam.ai/c/parfum-marketing) (parfum-marketing.fr)
Support French SMEs in cosmetic and food sectors through product innovation stages, from concept to market launch with tailored marketing and technical expertise. | Personal Care Product Manufacturing | 馃嚝馃嚪 La Rochelle | 14 | 2012 |
| 15 | [Blue Conseil Expertise](https://www.tamtam.ai/c/blue-conseil-expertise) (blue-conseil.com)
Financial consulting and support for SME leaders, focusing on strategy, management, compliance, accounting, and business transmission in digital and hospitality sectors. | Financial Services | 馃嚝馃嚪 La Rochelle | 13 | 2017 |
| 16 | [ACEC GECO ZENITH](https://www.tamtam.ai/c/acec-geco-zenith) (acecgecozenith.fr)
ACEC GECO ZENITH is a consulting, accounting, and auditing firm offering services in La Rochelle, Limoges, and Gu茅ret, specializing in various sectors of the economy | Accounting | 馃嚝馃嚪 Lagord | 13 | |
| 17 | [Objectif Entreprises et Commerces](https://www.tamtam.ai/c/objectif-entreprises-et-commerces) (objectifentreprisesetcommerces.fr)
Specialist in selling businesses and commercial assets since 2002, aiding in the transfer of funds and management of transactions | Leasing Non-residential Real Estate | 馃嚝馃嚪 La Rochelle | 10 | 2017 |
| 18 | [Office Notarial du Bois d'Amour 脿 SAINTES (17100)](https://www.tamtam.ai/c/office-notarial-du-bois-d-amour-a-saintes-17100) (office-notarial-du-boisdamour-saintes.notaires.fr)
A notarial office in Saintes, France, offering services in real estate law, family law, estate planning, business law, and real estate negotiation | Legal Services | 馃嚝馃嚪 Saintes | 5 | |
| 19 | [Apave - Agence de La Rochelle](https://www.tamtam.ai/c/apave-agence-de-la-rochelle) (apave.com)
A local agency in La Rochelle providing inspection, technical assistance, construction services, testing, training, and consulting to various clients | Environmental Services | 馃嚝馃嚪 P茅rigny | 5 | 1867 |
| 20 | [E, LITIS](https://www.tamtam.ai/c/e-litis)
Legal firm in Saintes and Royan, with six partners and four employees, providing legal advice and representation in Charente-Maritime and nationally | Legal Services | 馃嚝馃嚪 Saintes | 5 | 2020 |
| 21 | [2L concept](https://www.tamtam.ai/c/2l-concept) (2lconcept.fr)
Specializing in event architecture, planning, space design, technical direction, and logistics for a seamless event experience | Events Services | 馃嚝馃嚪 La Rochelle | 5 | 2012 |
| 22 | [ATLANTIC HUISSIERS DUFAURE CASTEX KALIACT 17](https://www.tamtam.ai/c/atlantic-huissiers-dufaure-castex-kaliact-17) (kaliact17.fr)
The company serves as a Court Officer and Mediator in the POITIERS Court of Appeal, handling legal activities nationwide | Legal Services | 馃嚝馃嚪 Saintes | 4 | 2018 |
| 23 | [PROJET COMMERCE](https://www.tamtam.ai/c/projet-commerce) (projetcommerce.fr)
A specialized agency in commercial real estate and business sales in Charente Maritime Providing comprehensive services including financing, legal support, and local business connections | Leasing Non-residential Real Estate | 馃嚝馃嚪 La Rochelle | 3 | 2002 |
| 24 | [NIMOS Design](https://www.tamtam.ai/c/nimos-design) (nimosdesign.fr)
Industrial designers for brand value and company values, innovation support, project integration from concept to realization, product coherence. | Design Services | 馃嚝馃嚪 Les Touches-de-P茅rigny | 3 | 2008 |
| 25 | [Groupe Am茅o](https://www.tamtam.ai/c/groupe-ameo) (groupeameo.com)
A special holding company specializing in designing and building commercial spaces Provides Design & Build services for hotels, restaurants, and shops | Leasing Non-residential Real Estate | 馃嚝馃嚪 La Rochelle | 3 | 2011 |
| 26 | [Kar锚m](https://www.tamtam.ai/c/karem)
KAREM is a consulting firm supporting business leaders in decision-making, specializing in management and organization for various industries and company sizes | Business Consulting and Services | 馃嚝馃嚪 Le Bois-Plage-en-R茅 | 1 | 2022 |
## 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.
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- [Multinational companies in the Charente-Maritime department](https://www.tamtam.ai/l/multinational-companies-charente-maritime) (36)
- [Public sector organisations in the Charente-Maritime department](https://www.tamtam.ai/l/public-sector-organisations-charente-maritime) (33)
## The same list elsewhere in France
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- [Professional services firms in Hauts-de-France](https://www.tamtam.ai/l/professional-services-firms-hauts-de-france) (260)
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- [Professional services firms in the Nord department](https://www.tamtam.ai/l/professional-services-firms-nord) (178)
- [Professional services firms in Brittany](https://www.tamtam.ai/l/professional-services-firms-brittany) (167)
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- [Professional services firms in the Gironde department](https://www.tamtam.ai/l/professional-services-firms-gironde) (151)
- [Professional services firms in Normandy](https://www.tamtam.ai/l/professional-services-firms-normandy) (114)
- [Professional services firms in the Yvelines department](https://www.tamtam.ai/l/professional-services-firms-yvelines) (108)
- [Professional services firms in Paris](https://www.tamtam.ai/l/professional-services-firms-paris) (2,241)
- [Professional services firms in Lyon](https://www.tamtam.ai/l/professional-services-firms-lyon) (265)
- [Professional services firms in Toulouse](https://www.tamtam.ai/l/professional-services-firms-toulouse) (139)
- [Professional services firms in Marseille](https://www.tamtam.ai/l/professional-services-firms-marseille) (123)
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Source: https://www.tamtam.ai/l/professional-services-firms-charente-maritime