# Top 27 law firms in Brittany

Tamtam tracks 27 law firms headquartered in Brittany. This list ranks all of them by number of employees on LinkedIn, led by Office Notarial Anastasia Moreau, L'Optimiste le Groupe and CELIADE. Their median headcount is 7. Half of them were founded in 2014 or later. The most common headquarters are Rennes (14) and Vannes (2).

This selection of companies in Brittany primarily features legal services and law practices, with a strong emphasis on notarial offices and intellectual property firms. The companies range from established institutions like DUGUESCLIN NOTAIRES, founded in 1610, to more recent establishments such as L'Optimiste le Groupe (2016) and CELIADE (2015). Office Notarial Anastasia Moreau, with 447 employees, is the largest on this list. Other notable firms include TRENTE CINQ NOTAIRES, which has been established for 50 years, and Carcreff, Société d'Avocats, specializing in business law.

A significant concentration of these legal firms is found in Rennes, indicating a central hub for legal services within Brittany. While many companies focus on traditional legal areas, such as real estate and family law, there is also a notable presence of firms like CABINET LE GUEN & ASSOCIES and SPARLANN, which specialize in intellectual property, patents, and digital law, reflecting a mix of established and specialized legal expertise.

🇫🇷 Brittany · 27 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Office Notarial Anastasia Moreau](https://www.tamtam.ai/c/office-notarial-anastasia-moreau) (moreau-fougeres.notaires.fr)<br>Located in the heart of Fougères, this company offers legal services in real estate, family, and corporate law, focusing on accessibility, listening, and modernity | Legal Services | 🇫🇷 Fougères | 447 |  |
| 2 | [L'Optimiste le Groupe](https://www.tamtam.ai/c/l-optimiste-le-groupe) (loptimiste.fr)<br>Collective of experts providing strategy, accounting, HR, legal, financing, and CSR support to over 1,500 SMEs in France. | Accounting | 🇫🇷 Rennes | 68 | 2016 |
| 3 | [CELIADE](https://www.tamtam.ai/c/celiade) (celiade.com)<br>Experienced jurists providing social law expertise, professional training, and dedicated support to staff representatives for improved social dialogue and mandate management. | Legal Services | 🇫🇷 Rennes | 45 | 2015 |
| 4 | [TRENTE CINQ NOTAIRES](https://www.tamtam.ai/c/trente-cinq-notaires) (trente-cinq-notaires.fr)<br>Established for 50 years, our notarial office combines the skills of 10 notaries and over 60 collaborators to support clients in all their projects | Legal Services | 🇫🇷 Bruz | 36 | 1973 |
| 5 | [DUGUESCLIN NOTAIRES](https://www.tamtam.ai/c/duguesclin-notaires) (notaires-duguesclin.fr)<br>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 | 🇫🇷 Rennes | 31 | 1610 |
| 6 | [Carcreff, Société d'Avocats](https://www.tamtam.ai/c/carcreff-societe-d-avocats) (carcreff-avocats.com)<br>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 | 🇫🇷 Rennes | 28 | 1971 |
| 7 | [CABINET LE GUEN & ASSOCIES](https://www.tamtam.ai/c/cabinet-le-guen-and-associes) (leguen-ip.com)<br>International industrial property services specializing in patent filing, trademark protection, legal auditing, and strategic portfolio management across electronics, biotechnology, and mechanical engineering sectors. | Legal Services | 🇫🇷 Saint-Malo | 22 | 1970 |
| 8 | [SCP Lemale - Desmullier - Mercadier : HBS Étude d'Huissier de Justice](https://www.tamtam.ai/c/scp-lemale-desmullier-mercadier-hbs-etude-d-huissier-de-justice) (ldm-huissiers-bretagne.com)<br>A team of three Associate Bailiffs of Justice, along with over 10 employees, offer legal services in Morbihan, Bretagne region, France | Legal Services | 🇫🇷 Vannes | 12 | 1993 |
| 9 | [Capnot Notaires - L’Expertise Notariale](https://www.tamtam.ai/c/capnot-notaires-l-expertise-notariale) (capnot.fr)<br>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 | 🇫🇷 Rennes | 12 | 2015 |
| 10 | [Etude du Mail - Notaires](https://www.tamtam.ai/c/etude-du-mail-notaires) (etudedumail.notaires.fr)<br>A team of notaries in Brittany offers legal advice, drafts and seals deeds, assists with international legal matters, and helps with real estate transactions | Real Estate | 🇫🇷 Combourg | 8 |  |
| 11 | [SPARLANN](https://www.tamtam.ai/c/sparlann) (sparlann.com)<br>SPARLANN is a law firm in Rennes specializing in intellectual property, digital law, trademarks, copyrights, contracts, personal data, and domain names | Law Practice | 🇫🇷 Rennes | 8 |  |
| 12 | [Cabinet Avolitis](https://www.tamtam.ai/c/cabinet-avolitis) (avolitis.com)<br>Established in 1979 and registered with the RENNES bar association, the company Avolitis advises and assists businesses, institutions, and individuals | Law Practice | 🇫🇷 Rennes | 8 | 1979 |
| 13 | [Not'Ouest - Notaires à Le Rheu et Chavagne](https://www.tamtam.ai/c/not-ouest-notaires-a-le-rheu-et-chavagne)<br>Established for almost 100 years in Le Rheu and 2023 in Chavagne, dedicated notarial team serving clients with proximity, accessibility, and personalized service for secure projects | Legal Services | 🇫🇷 Le Rheu | 8 |  |
| 14 | [PHENIX AVOCATS](https://www.tamtam.ai/c/phenix-avocats) (phenix-avocats.fr)<br>Law firm in Rennes specializing in labor law and social security, providing advice and representation in legal matters related to employment | Law Practice | 🇫🇷 Rennes | 7 | 2014 |
| 15 | [Clinique du Droit de Rennes](https://www.tamtam.ai/c/clinique-du-droit-de-rennes) (cliniquedudroit-rennes.fr)<br>The company is an association that provides free legal information through law students, supervised by legal professionals, to individuals and businesses | Legal Services | 🇫🇷 Rennes | 6 | 2018 |
| 16 | [Legisteam Tregor - Guilloux / Vourron / Le Noan / Lena - Notaires](https://www.tamtam.ai/c/legisteam-tregor-guilloux-vourron-le-noan-lena-notaires) (notaires.fr)<br>Notary office based in Lannion, France, offering services nationwide Specializing in legal document preparation and authentication for clients | Legal Services | 🇫🇷 Lannion | 6 |  |
| 17 | [HERMINE NOTAIRES](https://www.tamtam.ai/c/hermine-notaires)<br>A team of notaries and legal assistants providing support for all legal and estate matters, along with a real estate negotiation service | Legal Services | 🇫🇷 Saint-Grégoire | 6 | 2003 |
| 18 | [GORIOUX GRALL & ASSOCIES](https://www.tamtam.ai/c/gorioux-grall-and-associes) (gorioux.com)<br>A French accounting firm located in Bretagne, specializing in providing accounting services to clients in the region of Guipavas | Accounting | 🇫🇷 Guipavas | 5 |  |
| 19 | [KEROSE - Cabinet d'Avocats](https://www.tamtam.ai/c/kerose-cabinet-d-avocats) (kerose.eu)<br>Independent business law firm providing tailored solutions, attentive to projects, questions, and challenges, supporting clients throughout decision-making, innovation, and value creation processes | Law Practice | 🇫🇷 Rennes | 5 | 2020 |
| 20 | [HSA - Cabinet d'Avocats](https://www.tamtam.ai/c/hsa-cabinet-d-avocats) (cabinethsa.fr)<br>A law firm specializing in business law with a focus on company, commercial, tax, and real estate law, emphasizing responsiveness, efficiency, and expertise | Legal Services | 🇫🇷 Rennes | 5 | 2011 |
| 21 | [INVICTAE Avocats](https://www.tamtam.ai/c/invictae-avocats) (invictae-avocat.com)<br>An employment law firm in Rennes dedicated to defending the interests of employers, employees, and employee representative bodies in all aspects of labor law | Law Practice | 🇫🇷 Rennes | 4 | 2017 |
| 22 | [BRETAGNE HUISSIERS](https://www.tamtam.ai/c/bretagne-huissiers)<br>Legal services provider in Saint Brieuc, Bretagne, offering assistance with legal matters and civil enforcement through expert huissiers services | Legal Services | 🇫🇷 Saint-Brieuc | 4 |  |
| 23 | [Office notarial Laurent KERMAGORET](https://www.tamtam.ai/c/office-notarial-laurent-kermagoret) (kermagoret-vannes.notaires.fr)<br>Established in 2016, this notary office specializes in real estate, family law, and business law, offering proximity, reactivity, and reserved parking for clients | Legal Services | 🇫🇷 Vannes | 3 | 2016 |
| 24 | [Cabinet AEDICTA](https://www.tamtam.ai/c/cabinet-aedicta) (aedicta-avocats.com)<br>Law firm in Rennes, providing legal assistance to individuals and businesses in Ille et Vilaine and Brittany, France | Law Practice | 🇫🇷 Rennes | 3 | 2023 |
| 25 | [LEXARMOR](https://www.tamtam.ai/c/lexarmor) (lexarmor.fr)<br>Official page of a law firm in Brest, providing general legal services with passionate attorneys registered at the Bar Association | Law Practice | 🇫🇷 Saint-Martin-des-Champs | 2 |  |
| 26 | [CLYPEUS](https://www.tamtam.ai/c/clypeus)<br>CLYPEUS is a legal services company based in Rennes, France, specializing in providing legal support and advice to clients | Legal Services | 🇫🇷 Rennes | 2 |  |
| 27 | [SELARL LEXOMNIA](https://www.tamtam.ai/c/selarl-lexomnia) (lexomnia.fr)<br>Legal practice in BREST with 2 lawyers specializing in Banking Law, Civil Litigation, Construction Law, Family Law, and Contract Law | Law Practice | 🇫🇷 Brest | 1 |  |

## 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 13, 2026.

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## The same list elsewhere in France

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## The same list elsewhere

- [Law firms in the world](https://www.tamtam.ai/l/law-firms-in-the-world) (3,223)
- [Law firms in Europe](https://www.tamtam.ai/l/law-firms-in-europe) (1,618)

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Source: https://www.tamtam.ai/l/law-firms-brittany