# Bosser Expertise

> BOSSER EXPERTISE, trading as Comptasanté, is an active Nantes-based French SAS accounting firm founded in 2014 that provides online accounting, tax and administrative support specifically for liberal healthcare professionals.

Company page on Leadbay: https://mad-max.leadbay.ai/company/comptasante.fr · loaded 2026-10-28

## At a glance

- Website: https://comptasante.fr
- Team based in: Nantes (Leadbay's record and 2 more)
- Incorporated: Nantes, France (register)
- Registry: SIREN 800 204 935
- Founded: 2014 (agence-api.ouest-france.fr and 2 more)
- Industry: Accounting
- Employees: 21 (employees and founders, investors not counted; expertcomptapro.fr; Sources disagree: 40 (agence-api.ouest-france.fr), 84 (comptasante.fr, a company database))
- Seen in its site's code: Google Tag Manager (googletagmanager.com/gtm.js), Google Analytics (googletagmanager.com/gtag/js), WordPress (/wp-content/), Framer (framerusercontent.com), HubSpot (TXT include:coaxis.com include:spf.protection.outlook.com include:spf.sendinblue.com include:145483855.spf04.hubspot), Brevo (TXT sendinblue.com) (read 2026-10-30)
- Phone: 02 40 34 57 37
- Email: contact@comptasante.fr
- Address: 22 BOULEVARD DE BERLIN, 44000, NANTES, fr

## What it sells, to whom

- BOSSER EXPERTISE, trading as Comptasanté, is an active Nantes-based French SAS accounting firm founded in 2014 that provides online accounting, tax and administrative support specifically for liberal healthcare professionals. ([comptasante.fr](https://comptasante.fr/), [data.inpi.fr](https://data.inpi.fr/print/companies/800204935), [comptasante.fr](https://comptasante.fr/rappel-imm%C3%A9diat/))

## Products and services

- Comptasanté online accounting service for liberal healthcare professionals. ([comptasante.fr](https://comptasante.fr/), [comptasante.fr](https://comptasante.fr/rappel-imm%C3%A9diat/), [comptasante.fr](https://comptasante.fr/un-comptable-referent))
- Bookkeeping and accounting maintenance. ([comptasante.fr](https://comptasante.fr/), [comptasante.fr](https://comptasante.fr/rappel-imm%C3%A9diat/), [comptasante.fr](https://comptasante.fr/un-comptable-referent))
- Tax filings, including the 2035 professional-income return. ([comptasante.fr](https://comptasante.fr/), [comptasante.fr](https://comptasante.fr/rappel-imm%C3%A9diat/), [comptasante.fr](https://comptasante.fr/un-comptable-referent))
- Social declarations and support involving URSSAF, CARMF and CARPIMKO. ([comptasante.fr](https://comptasante.fr/), [comptasante.fr](https://comptasante.fr/rappel-imm%C3%A9diat/), [comptasante.fr](https://comptasante.fr/un-comptable-referent))
- AGA/document monitoring and income/tax optimization. ([comptasante.fr](https://comptasante.fr/), [comptasante.fr](https://comptasante.fr/rappel-imm%C3%A9diat/), [comptasante.fr](https://comptasante.fr/un-comptable-referent))
- **Business lifecycle support**: setup, salaried-to-liberal transition, association, legal-status changes, professional-premises acquisition and retirement/transfer planning. ([comptasante.fr](https://comptasante.fr/), [comptasante.fr](https://comptasante.fr/rappel-imm%C3%A9diat/), [comptasante.fr](https://comptasante.fr/un-comptable-referent))
- Dedicated accountant/reference-contact model with remote service across France and overseas territories. ([comptasante.fr](https://comptasante.fr/), [comptasante.fr](https://comptasante.fr/rappel-imm%C3%A9diat/), [comptasante.fr](https://comptasante.fr/un-comptable-referent))

## Customers and markets

- **Customers**: More than 11,000 healthcare practitioners, according to Comptasanté’s website/LinkedIn profile., Target customers are liberal healthcare professionals in France, including physicians, dentists, nurses, physiotherapists, speech therapists, midwives, paramedics and psychologists. ([comptasante.fr](https://comptasante.fr/), [comptasante.fr](https://comptasante.fr/rappel-imm%C3%A9diat/), [comptasante.fr](https://comptasante.fr/un-comptable-referent))
- **Markets**: Primary market: liberal/independent healthcare professionals in France. ([comptasante.fr](https://comptasante.fr/), [comptasante.fr](https://comptasante.fr/un-comptable-referent), [psgequity.com](https://psgequity.com/news/corilus-and-sofia-d%C3%A9veloppement-join-forces-to-build-a-leading-european-healthcare-software-platform))
- **Markets**: Specialties explicitly addressed include physicians, nurses, physiotherapists, speech therapists, midwives, osteopaths, dentists and other care professions. ([comptasante.fr](https://comptasante.fr/), [comptasante.fr](https://comptasante.fr/un-comptable-referent), [psgequity.com](https://psgequity.com/news/corilus-and-sofia-d%C3%A9veloppement-join-forces-to-build-a-leading-european-healthcare-software-platform))

## Team

- Youenn Kerambellec, Président
- Mathilde, Responsable Sales
- Antoine, Sales
- Valentin, Sales
- Amandine, Comptable
- Marie, Onboarding
- Valérie, Comptable
- Nadichel Ngoli, Comptable - Contrôleur de gestion | Diplômé Master CCA · [LinkedIn](https://www.linkedin.com/in/nadichel-ngoli-70a924155)

## Where to find more

- [This page in Markdown, for agents](https://mad-max.leadbay.ai/company/comptasante.fr.md)

## Decision makers

- [Youenn Kerambellec](https://mad-max.leadbay.ai/person/youenn-kerambellec--comptasante.fr.md), Président

Work emails and direct phones come with a Leadbay account: https://wow.leadbay.ai/?register=true

Where it comes from: 14 sites read (comptasante.fr, data.inpi.fr, corilus.be, lonasante.com, pappers.fr, societe.com, ikpartners.com, capitalcroissance.fr, …), the French register and the BODACC.

## Best way in

- Call the main line, 02 40 34 57 37: The main line, in Leadbay's record, verified 2026-08-28
- Write to contact@comptasante.fr (generic): A shared mailbox, in Leadbay's record, verified 2026-08-17

## Solvency

From the national register (INSEE, INPI) and the BODACC, read 2026-10-30. SIREN 800204935.

- Status: active, registered 2014-02-18 · SAS
- Procédures collectives: none in the BODACC (no sauvegarde, redressement or liquidation judiciaire)
- Revenue (chiffre d'affaires) 2025: €8,921,028
- Net income (résultat net) 2025: €2,284,985
- Accounts filed (comptes déposés): 2025-12-31, 2024-12-31, 2016-12-31
- Legal officers: SEFAC, Commissaire aux comptes titulaire; YODIRA E.C., Président de SAS
- Grade (Jev): C, moderate risk
- Risk of failure within 12 months (Jev, read 2026-10-25): 8%
- Risk of paying 90 days late within 12 months (Jev): 16%
- Pays its invoices (Jev): Within 30 days
- Cash on hand (Jev): 3 to 12 months of spending
- Debt (Jev): Low
- What Jev read: Active, created 2014-02-18; Profitable in 2025 (résultat net); No procédure collective in the BODACC; Accounts filed for the year closed 2025-12-31 (comptes déposés)

## Working on now

- France-wide, 100% digital accounting for independent healthcare professionals; the site says 11,000+ practitioners accompanied.
- Customer expansion across doctors, physiotherapists, nurses, speech therapists, midwives, osteopaths, dentists and other liberal healthcare professions.
- Helping clients prepare for mandatory e-invoicing: receiving electronic invoices from 1 September 2026 and broader SME obligations from 1 September 2027.
- Building a broader healthcare-software ecosystem after the Corilus–Sofia combination, with accounting/invoicing alongside practice-management, AI and telehealth capabilities.
- Recent content emphasis includes e-invoicing, retirement planning, tax deductions, social contributions and developing a liberal healthcare practice.

From: [L’expert-comptable qui facilite votre métier de soignant libéral](https://comptasante.fr/), [Nos rendez-vous mensuels](https://comptasante.fr/ressources/webinaires), [Conseils & actualités pour votre activité libérale](https://comptasante.fr/ressources/blog), [Facturation Électronique Professionnels de Santé : Guide 2026](https://comptasante.fr/ressources/blog/facturation-%C3%A9lectronique-obligations-calendrier-2026), [Corilus and Sofia Développement Join Forces to Build a Leading European Healthcare Software Platform | PSG](https://psgequity.com/news/corilus-and-sofia-d%C3%A9veloppement-join-forces-to-build-a-leading-european-healthcare-software-platform)

## Summary

Bosser Expertise, operating as Comptasanté, is an online accounting firm dedicated exclusively to independent medical and paramedical professionals in France [1][2]. It provides accounting, tax, and social declaration services, combining a digital application with personalized support from a dedicated accountant [3][2]. The company was founded in 2014 in Nantes by Yvan Bosser [1][2]. Since 2022, it has been a subsidiary of the Sofia Développement group, which was acquired by the Belgian firm Corilus in January 2026 [2]. Its primary competitors include local accounting firms and standalone accounting software solutions [2]. As of late 2026, the company supports over 10,000 practitioners [2].

[1]: https://ikpartners.com/company-news/sofia-developpement-invests-in-comptasante/ "Sofia Développement invests in Comptasanté - News - News"
[2]: https://www.lonasante.com/comptasante/ "Comptasanté : avis, tarifs, espace client et contact"
[3]: https://capitalcroissance.fr/2022/03/09/sofia-developpement-investit-au-capital-de-comptasante/ "Sofia Développement investit au capital de Comptasanté • Capital Croissance"
[4]: https://ikpartners.com/wp-content/uploads/2022/03/CP-Sofia-Developpement-Comptasante-vENG_vF.pdf "Sofia Développement invests in Comptasanté"
[5]: https://data.inpi.fr/print/companies/800204935 "ATTESTATION D'IMMATRICULATION AU REGISTRE NATIONAL DES ENTREPRISES"
[6]: https://entrepreneurs.lesechos.fr/gestion-entreprise/social-rh/recrutement-comptasante-embauche-des-profils-atypiques-pour-linnovation-et-le-fun-2017007 "Recrutement : Comptasanté embauche des profils atypiques pour l'innovation et le fun - Entrepreneurs"
[7]: https://compta-infirmiere.fr/ "L'Expert-Comptable 
dédié aux infirmiers libéraux"
[8]: https://linkedin.com/company/comptasante "Comptasanté"

## Sources

- [Bosser Expertise's website](https://comptasante.fr)
- [L’expert-comptable qui facilite votre métier de soignant libéral](https://comptasante.fr/)
- [Nos rendez-vous mensuels](https://comptasante.fr/ressources/webinaires)
- [Conseils & actualités pour votre activité libérale](https://comptasante.fr/ressources/blog)
- [Facturation Électronique Professionnels de Santé : Guide 2026](https://comptasante.fr/ressources/blog/facturation-%C3%A9lectronique-obligations-calendrier-2026)
- [Corilus and Sofia Développement Join Forces to Build a Leading European Healthcare Software Platform | PSG](https://psgequity.com/news/corilus-and-sofia-d%C3%A9veloppement-join-forces-to-build-a-leading-european-healthcare-software-platform)
- [Les différences entre un comptable et un expert-comptable expliquées simplement](https://comptasante.fr/ressources/blog/difference-entre-comptable-expert-comptable)
- [Le conseil n°1 pour les libéraux ? Devenez propriétaire de votre local !](https://comptasante.fr/ressources/blog/le-conseil-n1-pour-les-liberaux-devenez-proprietaire-de-votre-local)