PSI

What PSI does

PSI (legal name Partenariat Services Informatiques) is a French IT services firm (ESN) founded in 1993 and headquartered in Eu, Normandy. The company develops and distributes a proprietary integrated management software suite targeting French very small businesses (TPE) and small-to-medium enterprises (PME), built on the in-house HyperFile database platform. Its core products are Infacto (commercial management / ERP covering quote-to-delivery workflow), Aubade (multi-company accounting), and Arpège (payroll and social declarations for companies up to 500 employees), supplemented by sector-specific modules: PSI-GT for transport, Environna for waste management with TrackDéchets government integration, TiGiVi for fire protection, and a weighbridge management module. In 2026 the company added e.PsiFlow, an electronic invoicing solution positioned for the French e-invoicing reform.

PSI's business model combines annual software subscriptions and per-payslip recurring fees (Arpège at 6–14€ HT per payslip per month depending on employee count, plus 650€ HT/year network license), one-off custom development engagements, and IT infrastructure services spanning network setup, hardware resale via Dell and HP partnerships, and security/backup integration through Acronis, ESET, and Veeam. Distribution is entirely direct, sold through phone, email, in-person demonstration events in Normandy venues such as La Chocolaterie in Eu, and a regional sales-led motion. The company is a privately-held SAS with no disclosed institutional investors, funding rounds, acquisitions, or parent company; the publication director is listed as Legrix Sandrine. Revenue, customer count, and detailed headcount are not publicly disclosed, and PSI is classified as a Très Petite Entreprise (TPE) with 1–10 employees.

Name

PSI

Legal name

Partenariat Services Informatiques

Website

https://p-s-i.com

Company type

Private

Founded year

1993

Operating status

Operating

Headcount range

1–10 employees

Short description

PSI (Partenariat Services Informatiques) is a French ESN founded in 1993 that develops and sells proprietary management software (Infacto ERP, Aubade accounting, Arpège payroll) and IT infrastructure services to TPEs and SMEs in France.

Ownership category

akta.pro rank

Product category

Business Management Software

NAICS

Software Publishers (5132), Custom Computer Programming Services (541511)

SIC

Services-Computer Programming Services (7371)

akta.pro primary industry

Core ERP Suites (Financials, Procurement, Projects) (HDAEAEAA)

Keywords

• Business management software
• Payroll software
• Accounting software
• IT infrastructure services
• Web development

Headquarters

HQ city

Eu

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software Licenses and Subscriptions: PSI generates revenue through perpetual software licenses (e.g., annual contracts at 650€ HT for network version) and recurring monthly subscriptions for payroll software (6-14€ HT per payslip per month depending on company size).
2. Professional Services: Services include needs analysis, solution proposal, hardware/software installation, team training, commissioning, and ongoing technical assistance for the full lifecycle of customer projects.
3. Custom Software Development: PSI develops bespoke business management software (accounting, commercial management) and custom websites tailored to customer needs.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

PSI develops and distributes proprietary business management software for French small and medium enterprises (TPE/PME), including Infacto (ERP/commercial management), AuBade (accounting), and Arpège (payroll), alongside sector-specific modules (transport, waste management, fire protection). The company also provides IT infrastructure services (network setup, hardware installation, security, backups) and custom software and website development. Offerings are delivered with full lifecycle support from needs analysis through training and ongoing assistance.

Product overview

PSI (Partenariat Service Informatique) is a French IT services company (ESN) founded in 1993, specializing in business management software for small and medium enterprises. The product portfolio centers on three core proprietary software products: Infacto (commercial/ERP management), AuBade (accounting), and ArPège (payroll), all built on the HyperFile database. These three products are designed to interface with each other, with Infacto syncing real-time updates to the AuBade accounting module. The company also offers sector-specific add-on modules including PSI-GT (transport), Environna (waste management with TrackDéchets integration), TiGiVi (fire protection), and a weighbridge management system. PSI provides additional services including network infrastructure setup, custom software and website development, and hardware installation/maintenance.

Differentiator

Problem solved

Functional benefit

Brands

• Infacto: ERP solution for TPE and PME with modules for purchases, sales (orders, deliveries, invoices), commercial management, stock management, and production tracking.
• Arpège
• Aubade
• PSI-GT
• Environna
• TiGiVi
• e.PsiFlow

Products and services

• Infacto

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature6 records

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Sage: Sage is a dominant UK-headquartered but France-strong accounting and ERP software publisher serving SMEs and mid-market with Sage 50/100/Entreprise/Cloud offerings. It is directly comparable to PSI because it competes head-to-head in the French TPE/PME accounting and commercial management category where PSI's Aubade and Infacto operate.
• Cegid: Cegid is a major French cloud-native ERP, payroll, and finance software provider serving SMEs and mid-market with solutions like Cegid Loop, Cegid Payroll, and Quadra. It directly competes with PSI's Arpège payroll, Aubade accounting, and Infacto ERP offerings, particularly for French SMEs needing regulatory compliance.

Emerging players

• Pennylane: Pennylane is a fast-growing French cloud-based accounting and financial management platform for SMEs and their accountants. It is comparable to PSI because it targets the same French TPE/PME accounting segment but with a modern SaaS approach, positioning it as a disruptive threat to legacy publishers like PSI.
• Dougs: Dougs is a French online accounting and financial management service aimed at TPEs and small businesses, combining software with human accountant support. It competes with PSI for the same small-business French customer base that needs accessible accounting without in-house expertise.

Direct peers

• Quadratus: Quadratus is a French software publisher providing accounting, payroll, and commercial management solutions targeted at TPEs and small businesses. It is a direct peer because it shares PSI's customer profile, regulatory specialization (DSN, French accounting standards), and software-suite approach.
• Odoo: Odoo is a globally adopted open-source ERP platform with broad SME adoption, offering accounting, sales, inventory, payroll add-ons, and a marketplace of vertical modules. It competes directly with PSI's Infacto ERP and its vertical add-ons (PSI-GT, Environna, TiGiVi) at the lower end of the French SME market.
• Cogilog: Cogilog is a French accounting and management software publisher for SMEs and independent professionals, with products comparable to PSI's Aubade and Arpège. It is a direct peer in the French TPE accounting/payroll software segment.
• ACESI (groupe Numen): ACESI is a French regional IT services and software company serving SMEs with accounting, payroll, and management solutions, similar to PSI's profile as a small French ESN offering proprietary management software. Comparable as a same-size, same-segment regional competitor.
• EBP Informatique: EBP is a French software publisher specializing in accounting, payroll, and commercial management solutions for very small businesses (TPE) and small enterprises. It is one of the closest direct comparables to PSI because both target the same French TPE/PME segment with on-premise and SaaS accounting/commercial/payroll bundles at similar price points.

Regional players

• ISAGRI: ISAGRI is a major French software publisher specializing in management solutions for agricultural businesses (farms, cooperatives, agricultural SMEs). It is comparable to PSI as a French regional publisher of vertical management software with regulatory tailoring, though in a different sector (agriculture vs. generalist SMEs).

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights5 records

Customer concentration

• Facebookfacebook.com/partenariatserviceinformatique
• Instagraminstagram.com/_p.s.i_76/?igshid=YmMyMTA2M2Y%3D
• LinkedInlinkedin.com/company/partenariat-service-informatique

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 PSI