The strength of a national network with Synerga

Our purpose

Synerga is a national group of independent accounting and statutory audit firms. Since its creation, our ambition has been simple: to enable each member firm to benefit from the strength of a collective while retaining its independence.

In a constantly changing environment, firms must face many challenges: digital transformation, artificial intelligence, e-invoicing, changing client expectations, the attractiveness of the profession, and the development of new engagements.

We are convinced these challenges are better met together.

That is why Synerga brings its members together around a dynamic of sharing, pooling and co-building, to help each firm anticipate changes in the profession, develop its practice and grow its teams.

The values that drive the group

Independence

Each member firm retains its identity, organisation and freedom of decision. Synerga is not an imposed model, but a collective serving its members.

Sharing

Sharing experiences, knowledge and best practices is at the heart of how the group operates. We believe in the value of collective intelligence.

Innovation

We support firms as the profession evolves and help them anticipate the transformations impacting the sector.

Commitment

The strength of the group rests on the involvement of its members. Our meetings enable everyone to contribute to the collective momentum.

Our governance

The Board of Directors

In addition to defining the group’s main strategic directions, it ensures its sound development on a day-to-day basis.

The Executive Committee

It ensures project follow-up and oversees the joint initiatives carried out for member firms throughout the year.

The permanent team

It supports members on a daily basis and coordinates events, committees, training and projects.

The group’s stakeholders

All members SYNERGA

Yes, because within Synerga, all members are stakeholders 😉 Everyone takes part in the various initiatives offered by Synerga: general meetings, the annual convention, working groups, committees… Synerga’s Board is also open to anyone who wishes to get involved. And beyond the partners, employees are also part of the movement; their flagship moment is the annual university, attended by both partners and employees.

Adresse

Mail. : synerga@synerga.net Email copied!

Yes, because within Synerga, all members are stakeholders 😉

Everyone takes part in the various initiatives offered by Synerga: general meetings, the annual convention, working groups, committees… Synerga’s Board is also open to anyone who wishes to get involved.

And beyond the partners, employees are also part of the movement; their flagship moment is the annual university, attended by both partners and employees.

Cécile LAVIALE-ROLLIN

President of Synerga

Since January 2023, Cécile LAVIALE-ROLLIN has been elected President of Synerga. The Board of Directors renewed its confidence in her at our General Assembly in January 2026 for a further three years. She is a Partner at the LAVIALE firm, with offices in Le Havre, Paris, Evry and Mennecy.

Adresse

LAVIALE FIRM,
1 quai George V
76600 LE HAVRE

Mail. : synerga@synerga.net Email copied!

The Board of Directors

Thank you for your commitment!

Synerga’s Board of Directors is made up of women and men who are chartered accountants and statutory auditors, fully committed to serving the collective. As volunteers who are actively involved, they put their expertise, experience and energy at the service of the independence, development and future of member firms.

Adresse

The permanent team SYNERGA

A dynamic permanent team to lead, coordinate and promote the network.

Adresse

44 rue François Cevert
Building B, 1st floor
49000 ANGERS

Tel. : 02 41 44 02 88

Mail. : synerga@synerga.net Email copied!

How we operate

Synerga operates on a simple principle: share to move forward together.

Firms join the group

They join a network of independent firms that share the same challenges and ambitions.

Members take part in committees

Partners and employees exchange, work together and share feedback.

Work is pooled

The thinking, tools, methodologies, benchmarks and deliverables produced are made available to all.

Each firm benefits from the collective

Members save time, make decisions with greater confidence, and draw on the collective experience.

Our member firms

Present throughout France, Synerga’s member firms share the same ambition: to remain independent while benefiting from the strength of a committed collective.

Discover the firms that make up the group.

ACE Rixheim

6 rue de l'Aérodrome
68170 RIXHEIM

03 89 44 68 87

ACE Strasbourg

1 Place de la porte blanche
67000 STRASBOURG

03 88 23 50 00

ACTUARES Pontchâteau

11 rue Benjamin Franklin
PA de l’Abbaye
44160 PONTCHATEAU

0240880049

ACTUARES Sainte-Luce-sur-Loire

19 rue Marcel Dassault
Maison Neuve Business Park
44986 SAINTE LUCE SUR LOIRE

02 40 88 00 49

AD VALORIS Avranches

39 Division Leclerc Street
50300 AVRANCHES

0233905000

AD VALORIS Granville

1853 Route de Villedieu
50400 Granville

0233911570

AD VALORIS St Hilaire du Harcouet

46, Place Nationale
50600 SAINT HILAIRE DU HARCOUET

02 33 60 93 87

ADAERIS Angers

9 Place de la Laiterie
49100 ANGERS

0241741051

ADAERIS Carquefou

ZA La Fleuriaye
15, avenue Jean Rouxel
BP 50731
44481 CARQUEFOU

02 52 35 22 49

ADG NORMANDIE Dieppe

11 Route de l'Escarpe
76200 DIEPPE

02 35 84 60 43

ADG NORMANDIE Mont St Aignan

12 rue Linus Carl Pauling - Parc de la Vatine
76130 MONT SAINT AIGNAN

02 35 12 87 87

ADS Advisory Limoges

16 rue Charles Gide
87000 LIMOGES

05 55 34 50 42

ALTEA ST CYR SUR LOIRE

59 rue du Murier
37540 ST CYR SUR LOIRE

02 47 88 45 00

API Expertise – Valognes

1 C Binguet Street
50700 VALOGNES

02.33.77.31.60

API Expertises – Saint-Lô

77 rue Yvonne Godard
50003 SAINT-LÔ

02 33 77 31 60

AVENIR EXPERTISES Colmar

2 Boulevard du Champ de Mars
68000 COLMAR

03 89 65 90 10

AVENIR EXPERTISES Rixheim

6 rue de l'Aérodrome
68170 RIXHEIM

0389659010

BARRANDON & ASSOCIATES St Yrieix la Perche

15 Ave Jules Ferry
87500 SAINT YRIEIX LA PERCHE

0555342868

BARRANDON & ASSOCIES Limoges

20 rue Charles Gide
87000 LIMOGES

05 55 34 28 68

BTB Advisory Clermont-Ferrand

18 Jean Claret Street
63000 CLERMONT-FERRAND

BTB Advisory La Monnerie Le Montel

4 rue du 19 Mars 1962
BP 32
63650 LA MONNERIE LE MONTEL

0473514949

BTB Advisory Pont-du-Château

14 Rue de l'Abeille
63430 PONT-DU-CHATEAU

0443550513

BTB Advisory Romagnat

15 A rue Cugnot
63540 ROMAGNAT

0473353250

BTB Advisory Thiers

6 Rue du Champ du Bail
63300 THIERS

0473801276

CGR Expertise Bourges

Parc Comitec
1 Jean François Champollion Street
18000 Bourges

0248704760

CHARDON-ROCHE Le Puy-en-Velay

21 bis place Michelet
43000 LE PUY-EN-VELAY

0471054292

CHAUSSINAND Annonay

63 avenue de l'Europe
07100 ANNONAY

047532200

CHAUSSINAND Monistrol-sur-Loire

5 Rue Général de Chabron
43120 MONISTROL-SUR-LOIRE

04 75 33 22 00

CIMERGENCE Briançon

South Activity Center
51 Tabellions Street
05100 BRIANCON

0492202238

COHESIO Plérin

Eleusis Business Center
Building 6B
1 rue Pierre et Marie Curie
22190 PLERIN

02 96 58 62 10

COHESIO Quimper

Building "Les Galaxies"
38 Marcel Paul Street
29000 QUIMPER

02 98 10 09 43

COHESIO Rennes

105 avenue Henri Fréville
BP 90142
35201 RENNES CEDEX

02 99 50 31 92

COHESIO Vannes

3, François-Joseph Broussais Walk
56000 VANNES

02 22 48 11 70

DEC Caen

82 Bd Dunois
14000 CAEN

0231748050

DEC Le Havre

309 Aristide Briand Street
76600 LE HAVRE

0235248898

DEC Mont St Aignan

7 rue Andréï Sakharov
76130 MONT SAINT AIGNAN

0235614500

Décisia Plérin

Eleusis Business Center
Building 6B
1 rue Pierre et Marie Curie
22190 PLERIN

DILIGENTIA Armentières

51 rue de Lille
59280 ARMENTIERES

0320772479

DILIGENTIA Audit & Consolidation PARIS

46 rue Raffet
75016 PARIS

DILIGENTIA Hazebrouck

27 Warein Street
59190 HAZEBROUCK

0328509090

DILIGENTIA Lille

111 Berthe Morisot Street
59000 LILLE

0320170550

DILIGENTIA Sains-en-Gohelle

3 Town Hall Square
62114 SAINS-EN-GOHELLE

03 21 58 10 33

DILIGENTIA SJA Paris

8 rue de la Michodière
75002 PARIS

0681508961

DILIGENTIA St Laurent Blangy

25 rue René Cassin
62223 SAINT LAURENT BLANGY

0321581033

EFAC Pau

49 Pierrre de Belsunce Ave
64320 IDRON

0564270266

EPHISENS Briançon

159th RIA Avenue
Résidence du Parc
05100 Briançon

04 92 21 18 37

EPHISENS Chabottes

Le Tomas - Le Haute Plaine
05260 CHABOTTES

0492538400

EPHISENS Embrun

Les Halles solaires – 18 avenue de la Clapière
05200 EMBRUN

0492434085

EPHISENS Gap

Micropolis - Belle Aureille District
05000 GAP

0492538400

EXALTYS Oberhausbergen

11 rue des tulipes
67205 OBERHAUSBERGEN

0388596101

EXAUR Dardilly

Le Norly 2, Building 1
39 Chemin des Peupliers
69570 DARDILLY

0472848970

FAEC Mulhouse

18 rue du Sauvage
68100 MULHOUSE

03 89 46 42 66

FULL Bourges

Lahitolle Business Centre
6 Rue Maurice Roy
18000 BOURGES

06 27 72 30 60

GEC – SUD CONSEIL.COM Nice

35 rue de Paris
06000 NICE

0492476610

GESCO Ancenis

51 Bd Huchon - BP 10127
44154 ANCENIS-SAINT-GEREON

0240961424

GESCO Angers

44 Rue François Cevert - Building B - 1st floor
49000 ANGERS

0241471516

GESCO Beaupreau

4 rue du Sous-Préfet Barré - BNP 50075
49601 BEAUPREAU-EN-MAUGES

0241633803

GESCO Nantes (Treillières)

13, rue Maria Telkes
44119 Tréllières

0228017670

HUP Meroux Moval

1 TGV Station Avenue
90400 MEROUX MOVAL

contact@hup-rh.fr

JAVER Orléans

8 rue Claude Lewy - CS 50013
45073 ORLEANS

0238518282

LAVIALE Benesville

10 route du Baillage
76560 BENESVILLE

LAVIALE Evry Courcouronnes

2 Jean Mermoz Street - Zac St Guenault
91080 EVRY - COURCOURONNES

0170369680

LAVIALE Le Havre

Le Normandie Building
1 George V Quay
76051 LE HAVRE

0170369660

LAVIALE Paris

2 Villa de Lourcine
75014 PARIS

0170369696

LE BOURLOUT ADVISORY AND ACCOUNTING Lorient

1 Jean Monnet Place
Building E, 1st floor
56270 PLOEMEUR

0230919747

LE CARRE EXPERT Paris

19 rue d'Antin
75002 PARIS

01 42 29 69 83

LE CARRE EXPERTS Flins sur Seine

348 Sous les Murs du Parc
78410 FLINS SUR SEINE

01 30 63 91 24

LE CARRE EXPERTS Vanves

19 Jules Michelet Street
92170 VANVES

0146450531

LE CARRE EXPERTS Viroflay

100 Avenue du Général LECLERC
78220 VIROFLAY

01 39 24 81 01

LFE2C Chambourcy

80 Route de Mante
78240 CHAMBOURCY

06 17 43 28 30

MARION Saint-Nazaire

101 av François Mitterrand - BP 47
44611 SAINT NAZAIRE

0251100910

MENON Caissargues

100 Route de Nîmes
Avenue du Cambourin
30132 CAISSARGUES

04 99 61 46 14

MENON Montpellier

22 Georges Denizot Street
34090 MONTPELLIER

0499614614

PAIE FAC RH Pau

49 av Pierre de Belsunce
64320 IDRON

05 64 27 02 66

PAPIN & ASSOCIATES Cholet

6 bd Hérault
49300 CHOLET

0241582550

PERSPECTIVES Lamballe

1 Rue de la Déhanne Maroué
22400 LAMBALLE

02 21 81 02 60

ROCHE FERRET ASSOCIATES Saint Agrève

1 place Verdun
07320 SAINT AGREVE

0475302376

ROCHE-FERRET ASSOCIATES Tence

ZA de Leygat - La Gueuse
115 Route des Gorges
43190 TENCE

0471654452

S-ACQUI WECANGO Lherm

27 bis Chemin Larrieu
31600 LHERM

06 71 27 21 71

SAPHILSAUDIT Issy les Moulineaux

7 rue de la Pastorale d'Issy
92130 ISSY LES MOULINEAUX

068035862

SCE AECS Brive la Gaillarde

12 av Roger Roncier
19100 BRIVE LA GAILLARDE

0555233639

SCE ARC ADVISORY PME Meru

1 Rue du Docteur Gey
60110 MERU

03 44 22 11 82

SCE CDA Argentat

4 Avenue du Foch
19400 ARGENTAT

0555281084

SCE Corrèze Tulle

20 quai de Rigny
19000 TULLE

0555268858

SCE SOPEREC Boulazac Isle Manoir

3 avenue François Mitterrand
24750 BOULAZAC ISLE MANOIR

05 53 08 15 77

SCE SOPEREC Perigueux

4 Victor Hugo Street
24000 PERIGUEUX

05 53 08 15 96

SCE Tulle

20 quai de Rigny
19000 TULLE

0555207620

SEREC Billom

41 Rue de la Libération
63160 BILLOM

04 73 73 34 43

SEREC Clermont Ferrand

3 rue Patrick Depailler
Parc technologique La Pardieu
63063 CLERMONT FERRAND

0473285020

SEREC Consulting

Le Saint Cloud 1 entrance 1
Rue de la grange aux grains
03700 BELLERIVE SUR ALLIER

04 43 50 01 01

SEREC Montluçon-Commentry

56 Jean Jaurès Street
03600 COMMENTRY

04700583151

SEREC Paris-Roissy

Parc Residence
25 Doctor Paul Bruel Street
95380 LOUVRES

01 34 68 22 61

SEREC Riom

45 Avenue de Clermont
63200 RIOM

04 73 64 52 50

SOIP Muret

3 Bis Pierre Fons Street
31600 Muret

0534641632

STRATEGIS Lannion

Impasse St Pierre
22300 LANNION

02 96 48 75 52

STRATEGIS Paimpol

64 Av. du Général de Gaulle
22500 PAIMPOL

02 96 55 12 63

STRATEGIS Ploumagoar

1 Toullan Bian
22970 PLOUMAGOAR

02 96 11 04 90

SUSSAN & ASSOCIATES Bordeaux

17 Cornac Street
33000 BORDEAUX

05 57 26 20 30

SUSSAN & ASSOCIATES Canéjan

18 Chemin de la Briqueterie
33610 Canéjan

05 57 26 20 30

TENGO Plérin

Eleusis Business Center
Building 6B
1 rue Pierre et Marie Curie
22190 PLERIN

02 96 58 62 10

TOUCHET ASSOCIATES Gap

22 Route des Eyssagnières
05000 GAP

0492514454

WECANGO Toulouse

78 Allée Jean Jaurès - Bâtiment C/E
BP 71028
31000 TOULOUSE

0671272171

WEMA Bartenheim

17 rue de Huningue
68870 BARTENHEIM

03 89 29 33 00

WEMA BOURGOGNE Dijon

7 rue Anatole France
21300 Chenôve

0380743267

WEMA Brunstatt-Didenheim

1 rue de Berlin
68350 BRUNSTATT-DIDENHEIM

03 89 29 33 00

WEMA CALCULUS Strasbourg

44 Avenue du Rhin
67000 STRASBOURG

03 88 43 53 78

WEMA Creutzwald

Parc d'Activités Sud
57150 CREUTZWALD

03 87 29 73 73

WEMA Entzheim

23 rue Icare
67960 ENTZHEIM

03 90 00 33 33

WEMA FRANCHE COMTE Beaumes

1 rue Pierre Regad-Pellagru
25110 BEAUMES LES DAMES

0368890070

WEMA FRANCHE COMTE Besancon

8 rue Madeleine Brès
25000 Besançon

0381806122

WEMA FRANCHE COMTE Montbéliard

51 Avenue des Alliés
25200 Montbéliard

0381844988

WEMA FRANCHE COMTE Ornans

99 rue Pierre Vernier
25290 Ornans

0381621866

WEMA FRANCHE COMTE Pontarlier

4bis rue Arthur Bourdin
25300 Pontarlier

0381467004

WEMA FRANCHE COMTE Valdahon

4 rue de Maulbronn
25800 Valdahon

0381562144

WEMA LORRAINE Sarreguemines

7 place de la Gare
57202 SARREGUEMINES

0387980389

WEMA Metz

Zone Tournebrise
57160 MOULINS LES METZ

03 87 38 36 37

WEMA Morsbach

2 rue Robert Doisneau
57600 MORSBACH

03 87 29 39 39

WEMA Obernai

1 rue de Pully
67210 OBERNAI

03 88 47 62 62

WEMA Paris

43 rue Saint Augustin
75002 PARIS

01 42 33 06 60

WEMA Saint-Louis

9 rue du Temple
68300 SAINT-LOUIS

03 89 29 33 00

WEMA Sarre Union

1 place de la République
BP 30026
67261 SARRE UNION

03 88 00 12 83

WEMA Saverne

9 rue de la Gare
67700 SAVERNE

03 88 02 85 60

WEMA STAV Sarreguemines

310 rue de la Montagne
57200 SARREGUEMINES

03 87 26 27 28

WEMA Strasbourg

7 rue des Corroyeurs
67200 STRASBOURG

03 88 30 12 21

WEMA Wettolsheim

5 rue des Merisiers
ZA Les Erlen
68920 WETTOLSHEIM

03 89 29 33 00

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ACE Rixheim

6 rue de l'Aérodrome
68170 RIXHEIM

03 89 44 68 87

ACE Rixheim

Adress

6 rue de l'Aérodrome
68170 RIXHEIM

Tel. : 03 89 44 68 87

Website : View the website

The strength of a national network with Synerga

Our purpose

The values that drive the group

Our governance

The group’s stakeholders

How we operate

Firms join the group

Members take part in committees

Work is pooled

Each firm benefits from the collective

Our member firms

Our affiliations