SIERA

What SIERA does

SIERA is a privately held French accounting and business advisory firm headquartered at 1 Rue de Copenhague, Schiltigheim, near Strasbourg, founded in 1998 through a shareholder participation involving former principals of FIDUCIA and FIDUCIAIRE RHENANE. The firm offers six integrated service domains — accounting, tax advisory, HR and payroll, management and digitalization, wealth management, and corporate legal advisory — targeting French small and medium-sized business owners who require year-round multidisciplinary support. Operating with 1–10 employees from a single physical office, SIERA maintains a relationship-led, sales-driven go-to-market with no publicly disclosed pricing, acquiring clients via personal outreach, referrals, and digital channels (website, Facebook, Instagram, LinkedIn, email newsletter).

The firm's technology backbone centers on two proprietary client-facing digital platforms: MEG PLATEFORM By Siera (a portal at siera.mon-expert-en-gestion.fr for document access and business management) and WEB SERVICES By Siera (an extranet at extranet.siera.fr for secure document exchange and real-time activity monitoring). These platforms complement the core professional services offering and enable ongoing client self-service. The firm reports a 5.00/5.00 client satisfaction rating across more than 144 reviews and is GDPR-compliant. There is no evidence of AI/ML capabilities, external funding, or subsidiary operations; SIERA operates as an independent single-entity professional services firm registered in France under RCS Strasbourg 419 662 044 with €100,000 of registered capital.

Name

SIERA

Legal name

SIERA

Website

https://siera.fr

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

1–10 employees

Short description

SIERA is a privately held French accounting and business advisory firm in Schiltigheim (near Strasbourg), founded in 1998, serving SME and PMI owners with accounting, tax, payroll, wealth management, corporate legal, and digital management services via a relationship-led, single-office model.

Ownership category

akta.pro rank

Product category

Professional Accounting & Business Advisory

NAICS

Offices of Certified Public Accountants (541211)

SIC

Services-Management Consulting Services (8742)

akta.pro primary industry

Tax-Focused Wealth Management RIAs (FSAAACAD)

Keywords

• Accounting services
• Tax advisory
• Payroll management
• Wealth management
• Corporate legal services

Headquarters

HQ city

Schiltigheim

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Accounting & Bookkeeping Services: Recurring service fees for ongoing accounting, bookkeeping, and financial statement preparation for business clients throughout the year.
2. Tax Advisory & Compliance: Fees for tax declaration preparation, tax optimization counsel, and fiscal compliance services.
3. HR & Payroll Management: Fees for payroll processing, payslip generation, DSN declarations, and broader HR obligations management.
4. Legal & Corporate Structuring Services: Fees for company formation, statutory modifications, general meeting facilitation, and other corporate legal procedures.
5. Wealth Management & Heritage Advisory: Fees for personal and professional wealth structuring and optimization services.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

SIERA is an accounting and business advisory firm delivering year-round professional services to French entrepreneurs and SME owners across six domains: accounting and bookkeeping, tax advisory and compliance, HR and payroll management, management digitalisation, wealth/patrimony structuring, and corporate legal services. The firm supports its advisory offering with two proprietary digital platforms — MEG PLATEFORM and WEB SERVICES — that enable secure document exchange and real-time business activity monitoring for clients.

Product overview

SIERA is an accounting and business advisory firm offering a portfolio of professional services including accounting, tax advisory, HR and payroll management, wealth management, and legal support. The firm provides two proprietary digital platforms: MEG PLATEFORM By Siera (a client portal for document access and management) and WEB SERVICES By Siera (an extranet for document transmission and real-time activity monitoring). These digital tools complement the core service offerings, enabling clients to interact with the firm and track their business activities online.

Differentiator

Problem solved

Functional benefit

Brands

• MEG PLATEFORM: Digital platform for document access and management by Siera
• WEB SERVICES

Products and services

• Comptabilité (Accounting Services) Full accounting oversight including bookkeeping, annual accounts preparation, and financial activity analysis providing clear visibility into the financial health of a business, delivered to French SME owners and managers.
• Fiscalité (Tax Advisory) Tax management and optimization services including tax declarations, fiscal returns (liasse fiscale), and advisory to secure financial decisions, delivered to French SME owners and managers.
• RH & Paie (HR & Payroll) Social management services covering payslip production, social declarations (DSN), and broader HR obligations support, delivered to French employers and SME owners.
• Gestion & Digitalisation (Management & Digitalisation) Digital tools and management solutions enabling real-time business activity tracking and simplified business administration, delivered to French SME owners and managers.
• Gestion de patrimoine (Wealth Management)

Quantifiable outcome

• 5.00/5.00 average client satisfaction rating from 144+ reviews

Named customers3 records

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Three partnerships are on record, tiered minor.

• ICS-SAminorStrategic or Co-development PartnerICS-SA is listed as a partner on SIERA's website. The partnership allows SIERA to offer complementary specialized services to its clients through a trusted network of professional partners.
• NT2SIminorStrategic or Co-development PartnerNT2SI is listed as a partner on SIERA's website. The partnership contributes to SIERA's comprehensive service ecosystem for business clients.
• Gestion StrategiaminorStrategic or Co-development PartnerGestion Strategia is listed as a partner on SIERA's website, providing strategic management and consulting services within the partner network.

Scale indicators5 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• In Extenso: French network of expert-comptable firms serving SMEs across France with multi-disciplinary services (accounting, tax, payroll, legal). Directly comparable to SIERA in customer segment and service breadth, but operates at much greater scale through a federated partner model.
• Dougs: French online accounting firm targeting entrepreneurs and small business owners with a subscription-based, digitally delivered model. Comparable to SIERA in target customer (French SME owners) and core offering (accounting, tax, payroll), but competes via a fully remote/automated delivery model rather than local office presence.
• Cerfrance: Major French associative network of expert-comptable firms serving agriculture, TPE, and PME with accounting, tax, payroll, and legal services. Comparable to SIERA in customer profile (French small business owners) and multi-disciplinary service offering, but at significantly greater scale.
• AGEXIS: Network of independent French accounting firms (cabinets) serving PME and entrepreneurs across regions with accounting, social, and legal services. Directly comparable to SIERA in target market (regional French SMEs), service mix, and traditional cabinet operating model.

Emerging players

• Pennylane: French fintech building an all-in-one financial management platform for accountants and their SME clients. Comparable to SIERA as it serves the same French SME accounting buyer, but operates as a SaaS platform rather than a traditional cabinet, and could either compete with or empower SIERA's service delivery.
• Indy: French micro-business and freelance accounting platform with automated bookkeeping and tax filing. Comparable to SIERA in the French SMB accounting category but targets the smallest end (auto-entrepreneurs, freelancers) with a self-serve digital model, contrasted with SIERA's advisory-led local service.

Broad incumbents

• KPMG France: Big Four professional services firm with a substantial French practice serving mid-market and SME clients in addition to large enterprises. Comparable to SIERA in offering accounting, tax, payroll, and advisory services to French businesses, but operates at vastly greater scale with a different client mix.
• BDO France: Major international accounting and advisory network with a French practice serving mid-sized companies, including SMEs in the Alsace region. Comparable to SIERA in core accounting/tax/payroll services and French SME target, but with national brand reach and broader advisory capabilities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks4 records

Key highlights2 records

Customer concentration

• Facebookfacebook.com/siera.fr
• LinkedInlinkedin.com/company/siera
• Instagraminstagram.com/siera_expertise_comptable

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

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 SIERA