# Top 30 professional services firms in Rennes
Tamtam tracks 44 professional services firms headquartered in Rennes. This list ranks the 30 largest by number of employees on LinkedIn, led by Interaction Interim, RBI and Geirec. Their median headcount is 45. Half of them were founded in 2003 or later.
The professional services sector in Rennes features a mix of established mid-sized firms and younger companies. Key activities include staffing and recruiting, IT services, and accounting. Interaction Interim, with 1055 employees, provides temporary work and recruitment. RBI specializes in information systems design and integration, while Geirec and CAPEOS offer comprehensive accounting and advisory services. Groupe Creative focuses on IT and digital transformation projects.
A notable pattern among these companies is their strong local presence, with all listed headquarters located in Rennes. This suggests a concentration of professional expertise within the city. The firms also span a range of founding dates, from Geirec and CAPEOS established in 1979, to newer entities like Happy to meet you, founded in 2016, indicating a continuous evolution of the professional services landscape.
馃嚝馃嚪 Rennes 路 30 companies 路 Updated Nov 12, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Interaction Interim](https://www.tamtam.ai/c/interaction-interim) (interaction-interim.com)
National network providing temporary work, recruitment for fixed-term and permanent contracts, training, support, and consulting services across all business sectors. | Staffing and Recruiting | 馃嚝馃嚪 Rennes | 1,055 | 1991 |
| 2 | [RBI](https://www.tamtam.ai/c/rbi-rennes) (rbi-informatique.fr)
Specializing in information systems design, implementation, and integration, RBI-Informatique offers services in infrastructure, collaboration, and management solutions for businesses | IT Services and IT Consulting | 馃嚝馃嚪 Rennes | 468 | 1981 |
| 3 | [Geirec](https://www.tamtam.ai/c/geirec) (geirec.com)
An independent regional cabinet with a national focus, GEIREC supports businesses with expertise and values, offering daily partnership, confidentiality, competence, and responsiveness | Accounting | 馃嚝馃嚪 Rennes | 308 | 1979 |
| 4 | [CAPEOS](https://www.tamtam.ai/c/capeos-rennes) (capeos.fr)
Provides comprehensive accounting, legal, and tax services alongside audit, wealth management, and IT solutions for companies across diverse sectors through local offices. | Accounting | 馃嚝馃嚪 Rennes | 266 | 1979 |
| 5 | [Groupe Creative](https://www.tamtam.ai/c/groupe-creative) (groupe-creative.fr)
Works with clients on IT and digital transformation projects, offering expertise in consulting, creation, development, research, and innovation across various digital domains. | IT Services and IT Consulting | 馃嚝馃嚪 Rennes | 232 | 2008 |
| 6 | [Groupe Interaction](https://www.tamtam.ai/c/groupe-interaction) (interaction-groupe.com)
This company facilitates employment access, offering temp agencies, recruitment firms, specialized services, digital solutions, and a training center for diverse job seekers. | Staffing and Recruiting | 馃嚝馃嚪 Rennes | 178 | 1991 |
| 7 | [TALENDI](https://www.tamtam.ai/c/talendi) (talendi.com)
A social enterprise offering industrial and digital services, employing over 550 people, including 420 with disabilities, with expertise in various fields like assembly and logistics | Motor Vehicle Parts Manufacturing | 馃嚝馃嚪 Rennes | 137 | 1975 |
| 8 | [Tourny Meyer](https://www.tamtam.ai/c/tourny-meyer) (tournymeyer.fr)
Offers business real estate consulting, sales, and leasing services for offices, warehouses, retail, hotels, and urban developments across multiple French cities. | Real Estate | 馃嚝馃嚪 Rennes | 101 | 1990 |
| 9 | [TALENZ TOADENN](https://www.tamtam.ai/c/talenz-toadenn) (talenz.fr)
Multidisciplinary consulting firm supporting entrepreneurs and business leaders with strategy, finance, compliance, audit, legal, HR, and technology solutions. | Business Consulting and Services | 馃嚝馃嚪 Rennes | 92 | |
| 10 | [ADENT](https://www.tamtam.ai/c/adent) (adentingenierie.com)
Designing sustainable and adaptable agri-food factories that are both thoughtful and harmonious in their construction and operation | Construction | 馃嚝馃嚪 Rennes | 92 | 2006 |
| 11 | [CYIM](https://www.tamtam.ai/c/cyim) (cyim.com)
A company specializing in IT and audiovisual services for medical societies, offering digital solutions for medical congresses and associations | IT Services and IT Consulting | 馃嚝馃嚪 Rennes | 88 | 2001 |
| 12 | [Happy to meet you](https://www.tamtam.ai/c/happy-to-meet-you) (happytomeetyou.fr)
Provides human resources and communication expertise to companies, focusing on executive recruitment and HR consulting, including organizational transformation, development, and skill assessments. | Human Resources Services | 馃嚝馃嚪 Rennes | 71 | 2016 |
| 13 | [L'Optimiste le Groupe](https://www.tamtam.ai/c/l-optimiste-le-groupe) (loptimiste.fr)
Collective of experts providing strategy, accounting, HR, legal, financing, and CSR support to over 1,500 SMEs in France. | Accounting | 馃嚝馃嚪 Rennes | 68 | 2016 |
| 14 | [Provectio](https://www.tamtam.ai/c/provectio) (provectio.fr)
IT services provider offering IT management, security, cloud computing, telecommunications, and network availability for businesses, providing support, strategy, and technical expertise | Telecommunications | 馃嚝馃嚪 Rennes | 48 | 2004 |
| 15 | [CELIADE](https://www.tamtam.ai/c/celiade) (celiade.com)
Experienced jurists providing social law expertise, professional training, and dedicated support to staff representatives for improved social dialogue and mandate management. | Legal Services | 馃嚝馃嚪 Rennes | 45 | 2015 |
| 16 | [Immobili猫re d鈥橢ntreprise](https://www.tamtam.ai/c/immobiliere-d-entreprise) (immobiliere-entreprise.fr)
Offers specialized professional and commercial real estate services across multiple locations, leveraging two decades of local market knowledge and active community involvement. | Real Estate | 馃嚝馃嚪 Rennes | 42 | 1996 |
| 17 | [AGC Cuma Ouest](https://www.tamtam.ai/c/agc-cuma-ouest) (ouest.cuma.fr)
An association providing accounting and management services for agricultural cooperatives in the western region, with a focus on expert accountant guidance | Accounting | 馃嚝馃嚪 Rennes | 40 | |
| 18 | [SpikeeLabs](https://www.tamtam.ai/c/spikeelabs) (spikeelabs.fr)
SpikeeLabs provides information system design, development, integration, and support services with a focus on growth, innovation, and strong human values | IT Services and IT Consulting | 馃嚝馃嚪 Rennes | 38 | 2016 |
| 19 | [ID脡IS](https://www.tamtam.ai/c/ideis) (ideis.com)
Specialized training organization focusing on management and communication skills at work, offering tailored solutions to enhance relationships, teamwork, and enthusiasm | Professional Training and Coaching | 馃嚝馃嚪 Rennes | 36 | 1997 |
| 20 | [Ouiker](https://www.tamtam.ai/c/ouiker) (ouiker.fr)
A one-stop solution for rental property investment projects in France, from property search to management, covering renovations, furnishing, renting, and leasing Operating in 19 cities | Real Estate | 馃嚝馃嚪 Rennes | 32 | 2020 |
| 21 | [DUGUESCLIN NOTAIRES](https://www.tamtam.ai/c/duguesclin-notaires) (notaires-duguesclin.fr)
A notarial firm with offices in Rennes and Paris, offering a wide range of traditional and specialized services with a focus on excellence | Legal Services | 馃嚝馃嚪 Rennes | 31 | 1610 |
| 22 | [Carcreff, Soci茅t茅 d'Avocats](https://www.tamtam.ai/c/carcreff-societe-d-avocats) (carcreff-avocats.com)
Business law firm providing global and pragmatic legal solutions for complex strategic, investment, taxation, and social law issues, tailored to clients' personal aspirations | Legal Services | 馃嚝馃嚪 Rennes | 28 | 1971 |
| 23 | [Younight Hospitality](https://www.tamtam.ai/c/younight-hospitality) (younight-hospitality.com)
A hospitality management company assisting with hotel projects from acquisition to operations, ensuring thorough support throughout the entire process | Hospitality | 馃嚝馃嚪 Rennes | 24 | |
| 24 | [Serenis Consulting](https://www.tamtam.ai/c/serenis-consulting) (serenis-consulting.fr)
Specialized consulting firm auditing property taxes for professionals 18 years of experience, serving over 10,000 clients in France Offers comprehensive services and sponsors athletes | Financial Services | 馃嚝馃嚪 Rennes | 22 | 2003 |
| 25 | [Net-ng](https://www.tamtam.ai/c/net-ng) (net-ng.com)
A Rennes-based ESN specializing in custom Python web app development, providing tailored solutions across various industries since 2003 | IT Services and IT Consulting | 馃嚝馃嚪 Rennes | 20 | 2003 |
| 26 | [Theodore Search](https://www.tamtam.ai/c/theodore-search) (theodore-search.com)
Specializing in executive search and recruitment, this firm offers tailored support for strategic hires They are also dedicated to fighting recruitment discrimination | Human Resources Services | 馃嚝馃嚪 Rennes | 16 | 2002 |
| 27 | [Capnot Notaires - L鈥橢xpertise Notariale](https://www.tamtam.ai/c/capnot-notaires-l-expertise-notariale) (capnot.fr)
CAPNOT is a network of notarial studies created in 2015, bringing together over 130 notaries and 560 employees to offer comprehensive notarial services | Legal Services | 馃嚝馃嚪 Rennes | 12 | 2015 |
| 28 | [CLEPER](https://www.tamtam.ai/c/cleper) (cleper.fr)
Provides human resources consulting focused on career management, leadership development, and HR strategy for companies in Brittany and Pays de la Loire. | Human Resources Services | 馃嚝馃嚪 Rennes | 9 | 2009 |
| 29 | [Farsight VR](https://www.tamtam.ai/c/farsight-vr) (farsight-vr.com)
FARSIGHT specializes in creating custom virtual reality environments, augmented reality applications, and precise 3D modeling using the latest technologies | Professional Training and Coaching | 馃嚝馃嚪 Rennes | 9 | 2015 |
| 30 | [COT脡 PROFINANCE](https://www.tamtam.ai/c/cote-profinance) (coteprofinance.fr)
We are a wealth management consulting firm offering services such as asset assessment, tax and estate planning, financial and real estate investments | Investment Management | 馃嚝馃嚪 Rennes | 8 | 2017 |
## 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 12, 2026.
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Source: https://www.tamtam.ai/l/professional-services-firms-rennes