Oresys

What Oresys does

Oresys is a French independent management consulting firm founded in 1981 and headquartered at 48 Rue de Londres, Paris. The firm specializes in transformation, organization, and information systems consulting, serving CAC 40 large enterprises and ETI (mid-size companies) across France and Switzerland through a network of 8 regional offices (Paris, Lausanne, Geneva, Lille, Lyon, Marseille, Nantes, Toulouse, Strasbourg). Oresys employs approximately 370 consultants delivering around 680 missions per year to roughly 110 clients.

The firm's core offering is professional services consulting across the full transformation lifecycle: strategic framing, enterprise architecture, organization and process optimization, project management, change management, data strategy and AI/BI/DataViz, PPM/SPM/GPI advisory, managerial transformation, environmental transition, and asset management. Oresys backs its engagements with proprietary methodologies and tools, including Transformation Confiante (a registered trust-based transformation philosophy), Right Analytics (BI/dataviz platform), RightChange (change impact analysis), POP (project planning centered on employee fulfillment), Oresys Studio (communication support), PartnerBooster (stakeholder management), and Learning Box (training design). Long-tenured certified partnerships with Planisware (25 years) and Triskell (10 years) anchor the PPM practice. International delivery is enabled through Cordence Worldwide, a network created by Oresys in 2005 that now comprises 8 member firms with 3,500 consultants across 22 countries.

Oresys operates a project-based professional services revenue model with quote-based, multi-year enterprise engagements. The firm reports FY2025 revenue of €65 million. Go-to-market is sales-led and partner-driven through regional offices, supported by thought leadership content (white papers), client case studies, webinars, and the Cordence network for cross-border needs. Talent retention is positioned as a differentiator, with turnover reported at 2x lower than the consulting market average. Certifications include ISO 9001 (held since 1995, the first in French consulting) and Qualiopi (renewed October 2025 for three years).

Name

Oresys

Legal name

Oresys

Website

https://oresys.eu

Company type

Private

Founded year

1981

Operating status

Operating

Headcount range

251–500 employees

Short description

Oresys is a French independent management consulting firm founded in 1981 that delivers transformation, organization, and information systems consulting to CAC 40 groups and mid-size enterprises across France and Switzerland via 8 offices and ~370 consultants.

Ownership category

akta.pro rank

Product category

Management Consulting

NAICS

Administrative Management and General Management Consulting Services (541611), Human Resources Consulting Services (541612)

SIC

Services-Management Consulting Services (8742), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

HR Strategy & Operating Model Design (BPACAJAA)

akta.pro secondary industries

People Analytics, Assessment & Psychometrics Consulting (BPAHAGAH), HR Technology (HRIS/HCM) Advisory & Implementation (BPAHAGAG), Marketing Technology (MarTech) Strategy & Stack Advisory (MPAAAFAJ)

Keywords

• Management consulting services
• Enterprise transformation consulting
• Change management advisory
• Enterprise architecture consulting
• Data and analytics consulting

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices9 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Consulting Services: Professional consulting services billed on a project/engagement basis. Revenue is generated through billable consultant hours on transformation, organization, process, project management, change management, data, and IT advisory engagements. Pricing is quote-based and not publicly disclosed.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels7 records

Core offering

Oresys is an independent management consulting firm that sells transformation, organization, and information systems consulting services to large enterprises and mid-size companies. Engagements span enterprise architecture, business process optimization, project framing and management, change management, data strategy, PPM/SPM, managerial transformation, environmental transition, and asset management, delivered through proprietary methodologies (Transformation Confiante, RightChange, Right Analytics, POP, Learning Box, PartnerBooster) and partner-certified expertise with tools such as Planisware, Triskell, Power BI, Qlik, Tableau, SAP, and Salesforce.

Product overview

Oresys is an independent consulting firm (cabinet de conseil) specializing in transformation, organization, and information systems consulting. Founded in 1981, the company serves CAC 40 groups and mid-size enterprises (ETI) in France and internationally through its network of offices. Oresys does not offer a unified software platform or modules; instead, it provides a portfolio of consulting service offerings organized around core methodologies and sector expertise. The company's service portfolio includes Transformation Consulting, Enterprise Architecture, Organization & Process Optimization, Project Management, Change Management, Data Services (BI/Dataviz/DataScience), PPM/PFM/GPI Advisory, Managerial Transformation, Environmental Transition, and Asset Management. These services are delivered through proprietary methodologies such as 'Transformation Confiante' (Trusting Transformation), 'Right Change', 'Right Analytics', 'POP', 'Learning Box', and 'PartnerBooster', supplemented by expertise with third-party tools like Planisware, Triskell, Power BI, Qlik, Tableau, and SAP/Salesforce/Oracle ecosystems.

Differentiator

Problem solved

Functional benefit

Products and services

• Transformation Consulting Services
• Enterprise Architecture Advisory
• Organization and Process Consulting
• Project Framing (Cadrage)
• Project Management (Conduite de Projet)
• Change Management and Deployment
• Data Services (BI, Dataviz, DataScience)
• Data Roadmap and Strategy
• PPM / PFM / GPI Advisory
• Managerial Transformation
• Environmental Transition Consulting
• Asset Management Consulting

Quantifiable outcome

• METRO France: average delivery time reduced by half following e-commerce process optimization engagement
• +13 more outcomes

Named customers50 records

Segments13 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability8 records

Feature8 records

Partnerships

Five partnerships are on record, tiered minor and core.

• Regus (Workspace Provider)minorOthers · 1 January 2024Oresys Switzerland opened its new Geneva office at Regus on the Pont-Rouge esplanade in October 2025. Regus provides flexible workspace and meeting facilities for Oresys' Geneva team.
• Triskell (Certified Partner)coreImplementation/ SI/ Consulting Partner · 1 January 2015Certified Triskell partner for 10 years, Oresys provides comprehensive implementation and consulting services for Triskell Software deployment. The partnership supports Oresys' strategic portfolio management (SPM/PFM) offerings, with Triskell centers of competence in Paris, Lille, Lyon, Nantes, Toulouse, Brussels, Lausanne, and Marseille.
• Cordence WorldwidecoreStrategic or Co-development Partner · 1 January 2005Oresys created Cordence Worldwide in 2005 to accompany its clients internationally. Today, Cordence is a network of 8 member firms with 3,500 consultants operating across 22 countries. Members share the same quality and commitment requirements towards their clients. The network enables Oresys to provide global reach while maintaining consistent service standards. Key benefits include access to a worldwide expert network, innovation beyond borders, international best practice benchmarking, and local accompaniment in client transformations.
• Club Urba-EAminorStrategic or Co-development Partner · 1 January 2000Co-founded and animated by Oresys since 2000, Club Urba-EA is an Enterprise Architecture community of practice with more than 70 member companies sharing experiences. Oresys uses this community to develop its EA know-how and share best practices across members. The club provides a platform for knowledge exchange and innovation in enterprise architecture methods.
• Planisware (Certified Partner)coreImplementation/ SI/ Consulting Partner · 1 January 2000Certified Planisware partner for 25 years, Oresys has deep and comprehensive knowledge of Planisware Enterprise including the E7 version. Oresys deploys Planisware for PPM and portfolio management implementations for large industrial and corporate clients. The partnership is central to Oresys' PPM service offering.

Scale indicators14 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Wavestone: French-headquartered independent consulting firm with a similar transformation, organization, and digital consulting profile, serving CAC 40 and large enterprises in France and internationally. Closely comparable in scale, positioning, and client base.
• Sia Partners: Paris-origin independent management and AI consulting firm serving large enterprises across transformation, data, and digital. Comparable independent positioning, similar sector breadth, and overlapping CAC 40 client base.
• Onepoint: French independent consulting and digital transformation firm with comparable size and similar mix of strategy, technology, and organizational transformation engagements for major French enterprises.
• Talan: French consulting and technology services firm offering transformation, data, AI, and innovation consulting with comparable mid-market and CAC 40 client focus. Similar culture of French independent consultancy with international reach.
• Devoteam: European IT and digital transformation consulting firm with comparable size, French roots, and overlap with Oresys on cloud, data, AI, and enterprise transformation mandates for CAC 40 clients.

Broad incumbents

• Capgemini Invent: Digital transformation consulting arm of Capgemini, competing head-to-head with Oresys on large enterprise transformation, data, and innovation mandates. Operates at significantly larger scale with global delivery capability.
• Roland Berger: European-headquartered strategic and operational consulting firm competing for transformation, organizational, and performance improvement engagements with French and European large enterprises.
• Accenture Strategy & Consulting: Global consulting incumbent offering end-to-end transformation, technology, and operations services; competes with Oresys for CAC 40 mandates, particularly on multi-region, large-budget programs.

Regional players

• Sopra Steria Consulting: European-headquartered IT and transformation consulting firm with strong French presence and similar sector breadth including banking, public sector, energy, and transportation. Comparable in size and French enterprise focus.

Emerging players

• Alvarez & Marsal: Global professional services firm with growing European consulting practice competing for performance improvement, transformation, and operational restructuring engagements at large European enterprises.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/oresys
• YouTubeyoutube.com/user/Oresys1?app=desktop
• LinkedInlinkedin.com/company/165338/admin

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles22 records

Subsidiaries1 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 Oresys