In Extenso

What In Extenso does

In Extenso is a France-based chartered accountancy firm headquartered in Boulogne-Billancourt and operating as part of the Deloitte network in France. Founded in 1991 and previously known as Planeth, the firm employs between 5,001 and 10,000 people and is described as one of France's largest chartered accountancy practices, serving the country's fragmented market of approximately 19,000 accounting firms and 3.8 million SMEs. It operates through multiple specialized divisions including In Extenso Tourisme, Culture & Hôtellerie (TCH) for advisory services, In Extenso Recrutement, In Extenso Finance & Transmission, In Extenso Innovation Croissance, In Extenso Avocats, and In Extenso Patrimoine.

The firm generates revenue primarily through professional services — chartered accountancy, tax, payroll, and strategic consulting — delivered via engagement-based engagements. The TCH division provides end-to-end advisory across regional strategic planning, market and feasibility studies, project programming and AMO (owner's representative), operational optimization, visitor/audience observatories, financial valuation, and M&A advisory for hotels, tourism properties, and cultural heritage sites. In parallel, In Extenso founded Fulll, a cloud-native SaaS platform offering accounting and payroll software to chartered accountancy firms, targeting the French e-invoicing reform as a structural tailwind. In March 2026, Norway-based Visma acquired a minority strategic stake in Fulll, providing external validation and growth capital.

The company's go-to-market combines direct consulting sales to public-sector clients (regional and departmental councils, municipalities, public institutions) and private operators across tourism, hospitality, and culture, with cross-border delivery in France, Africa, Morocco, and French overseas territories. Marketing channels span the firm's website, social media presence, regular hotel industry observatories and benchmark publications, and webinar series on hospitality trends, all reinforcing brand authority in a specialized vertical.

Name

In Extenso

Legal name

In Extenso

Website

https://inextenso-tch.com

Company type

Private

Founded year

1991

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

In Extenso is a France-based chartered accountancy firm within the Deloitte network, offering accounting, tax, payroll, and consulting services to SMEs alongside specialized tourism, culture, and hospitality advisory (In Extenso TCH) and the Fulll SaaS platform.

Ownership category

akta.pro rank

Product category

Professional Services / Accounting and Advisory

NAICS

Offices of Certified Public Accountants (541211), Finance and Insurance (52)

akta.pro primary industry

General Ledger & Close (Journal Entries, Month-End Close, Reconciliations) (BPAAAGAC)

akta.pro secondary industries

Hospitality (Hotels & Resorts) Asset Management (BPAJAMAE), ESG Governance, Sustainability Reporting & Assurance Advisory (BPAHAFAJ)

Keywords

• Chartered accounting services
• Audit and tax advisory
• Tourism consulting
• Hospitality advisory
• Payroll and HR outsourcing

Headquarters

HQ city

Boulogne-billancourt

HQ country

France

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Chartered Accountancy Services: In Extenso operates as one of France's largest chartered accountancy firms, providing accounting, tax, and payroll services to SMEs. The firm also founded Fulll, a cloud-native accounting and payroll SaaS platform.

Distribution channels1 record

Marketing channels4 records

Core offering

In Extenso is a France-based chartered accounting firm that delivers accounting, audit, tax, payroll, legal, recruitment, and wealth advisory services, with a dedicated tourism, culture, and hospitality (TCH) consulting practice that covers regional strategic planning, market and feasibility studies, project management (AMO), operational optimization, visitor monitoring, financial valuation, and M&A advisory. It complements these services with Fulll, a cloud-native accounting and payroll SaaS platform for SMEs and accounting firms.

Product overview

In Extenso is a diversified professional services group operating primarily as a consulting firm specialized in tourism, culture, and hospitality. The core offering consists of consulting services organized around: strategic planning (regional development, destination strategy), market intelligence (feasibility studies, market research), project delivery (programming, AMO, operational setup), operational excellence (optimization, visitor studies), and transactional advisory (valuations, M&A support). Key sector verticals include lodging and tourism real estate, culture and heritage, and general tourism and leisure. In Extenso also operates through sub-brands including In Extenso TCH (Tourism, Culture & Hospitality) which constitutes the primary consulting division, and fulll, a cloud-native accounting and payroll SaaS platform spun off from In Extenso and focused on the French accounting market.

Differentiator

Problem solved

Functional benefit

Products and services

• Regional Strategic Planning Tourism development strategy advisory for public authorities and territories, defining positioning, action plans, and governance frameworks.
• Market, Conceptual, Design and Feasibility Studies Feasibility, market, and concept studies for tourism, culture, and hospitality projects, supporting investment decisions and public project validation.
• Programming, Project Management and Operation Set-up (AMO) Project management assistance (assistance à maîtrise d'ouvrage, AMO) including programming, operational set-up, and hotel asset management for new tourism and hospitality operations.
• Operational Optimisation Performance and operational optimization advisory for tourism, hospitality, and cultural venues to improve yield, cost efficiency, and guest experience.
• Visitor Monitoring and Studies Visitor flow monitoring, audience studies, and impact analysis for tourism sites, cultural venues, and regional destinations.
• Financial Valuation Financial valuation services for tourism, hospitality, and cultural assets, supporting transactions, financing, and balance-sheet decisions.
• Sales and Acquisitions Advice M&A advisory for tourism, hospitality, and culture businesses, including sell-side and buy-side mandates, deal structuring, and transaction support.
• Fulll Cloud Accounting and Payroll SaaS Platform Cloud-native SaaS platform for accounting and payroll workflows, targeted at SMEs and accounting firms, with Visma holding a minority stake as of March 2026.

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Four partnerships are on record, tiered core and minor.

• DeloittecoreOthersIn Extenso is part of the Deloitte network, as referenced in their branding and association with Deloitte on their website footer.
• TransaxiocoreStrategic or Co-development PartnerTransaxio is a partner of In Extenso specializing in hotel buying and selling transactions. They operate as a complementary service for hospitality M&A activities.
• FulllcoreStrategic or Co-development PartnerFulll is the cloud-native accounting and payroll SaaS platform founded by In Extenso. It represents In Extenso's digital transformation initiative in the accounting software space, now receiving strategic investment from Visma.
• SomivalminorImplementation/ SI/ Consulting PartnerSomival is a partner in tourism development projects, notably for the Hautes-Alpes strategic focus study on tourist lodging.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Direct peers

• Christie & Co: European hospitality property specialist offering hotel brokerage, valuation, and consultancy services. Comparable to In Extenso TCH for hotel sales/acquisition advisory and feasibility work, particularly in France and broader European markets.
• Cegid: Major French cloud accounting and payroll software provider serving SMEs, accountants, and HR professionals. Direct competitor to Fulll (In Extenso's SaaS spin-off) in the French accounting/payroll software market ahead of mandatory e-invoicing reform.
• Mazars: Major international audit and advisory firm with strong French presence serving mid-market and SME clients. Closely comparable to In Extenso in targeting mid-sized French companies with audit, tax, and advisory services; both operate as alternatives to the Big Four.
• BDO France: Global accounting network with substantial French operations serving SMEs and mid-market clients. Directly comparable to In Extenso's chartered accountancy core offering, with similar client profile and service mix including advisory.
• Horwath HTL: Global hospitality-focused consulting and advisory firm with strong European presence. Most directly comparable peer to In Extenso TCH for hotel feasibility studies, valuations, operator selection, and tourism sector advisory mandates.
• HVS Global Hospitality Services: Leading global hospitality consulting firm specializing in hotel feasibility, valuation, and asset management. Directly comparable to In Extenso TCH's feasibility, financial valuation, and hotel AMO service lines.

Broad incumbents

• KPMG France: Big Four professional services firm with substantial French chartered accountancy and consulting operations. Directly comparable as a competitor for both SME accounting services and strategic consulting mandates in tourism and hospitality.
• EY France: Big Four professional services firm operating across France with audit, tax, consulting, and transactions services. Direct competitor in the French chartered accountancy market and broader advisory services targeting SMEs and enterprises.
• Deloitte France: Parent network of In Extenso and the global Big Four firm with French operations. Directly comparable as a broad professional services and consulting incumbent; In Extenso effectively serves as Deloitte's French member firm and competes for overlapping consulting mandates.
• PwC France: Big Four professional services firm offering audit, tax, and consulting in France. Comparable to In Extenso in serving French SMEs and enterprises with accounting, advisory, and M&A services including hospitality sector mandates.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UCXHDaOa8gVAlx6sYeMDmjgg
• Facebookfacebook.com/inextenso.fr
• LinkedInlinkedin.com/company/in-extenso
• Instagraminstagram.com/in_extenso_tch
• Xx.com/inextenso_tch

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about In Extenso