Square-One

What Square-One does

Square-One (legal entity SquareOne, SAS) is a French digital services company (ESN — Entreprise de Services du Numérique) headquartered at Tour W, Paris La Défense. Founded around 2017-2018, the firm delivers consulting, integration, and managed services across three core practices: Big Data & AI, Cybersecurity, and Cloud C&SI. Its service portfolio spans predictive analytics, generative AI, MLOps, AI Act governance, security operations (SOC, vulnerability management, incident response), and cloud architecture/migration, with regulated-environment expertise in frameworks including RGPD, NIS2, DORA, and the AI Act.

The firm operates a hybrid delivery model combining permanent employees (CDI) and vetted freelance consultants, supported by a bench of 350+ senior engineers. Customer concentration is anchored in mid-to-large French enterprises and public-sector organizations — disclosed logos include Groupe BPCE, Thales, Sopra Steria, a French Ministry department, SACEM, OVHcloud, Orano, Framatome, Dexia, Dassault Aviation, Autoliv, Allianz France, La Poste, and TotalEnergies — with 40+ active enterprise clients reported. Revenue mechanics are standard ESN: billable day-rate engagements, multi-year staff-augmentation and managed-service contracts, and project-based integration work, scaled through acquisition (notably the July 2023 acquisition of StarTec Informatique).

The company pursues an explicit ESG and quality positioning: it is ranked 97th in the Top 100 French ESN (2024), is a member of Bpifrance's Club Excellence, has signed the Diversity Charter (February 2025), published its first Carbon Assessment (March 2025), joined the Coq Vert community (2024), and was upgraded to EcoVadis Platinum in April 2026 (from Gold in May 2025). The "Vision 5-2030" strategic roadmap formalizes growth priorities across its three practices and ESG commitments.

Name

Square-One

Legal name

SquareOne

Website

https://square-one.fr

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

51–100 employees

Short description

Square-One is a Paris-based French IT services firm (ESN) delivering Big Data/AI, cybersecurity, and cloud consulting to 40+ enterprise and public-sector clients, including Thales, Groupe BPCE, and TotalEnergies, with 350+ senior consultants.

Ownership category

akta.pro rank

Product category

IT Consulting Services

NAICS

Computer Systems Design and Related Services (54151), Custom Computer Programming Services (541511)

SIC

Services-Management Consulting Services (8742), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Data, Analytics & AI Consulting (BPAHAEAF)

akta.pro secondary industry

Enterprise Architecture & IT Operating Model (BPAHAEAB)

Keywords

• IT consulting services
• Cybersecurity consulting
• Cloud migration
• Data engineering
• Digital transformation

Headquarters

HQ city

Boulogne-billancourt

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional IT Consulting Services: SquareOne generates revenue primarily through billable consulting engagements delivered by its engineers at client sites. Consultants are placed as technical assistance under CDI (permanent contracts) or freelance arrangements. Revenue is driven by day rates charged to clients for Data & AI, Cybersecurity, and Cloud expertise.
2. Staffing / Technical Assistance: As an ESN, SquareOne provides IT staffing services where its consultants are embedded in client organizations as technical assistance. This model generates recurring revenue based on consultant assignments and project duration.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

SquareOne is an IT services firm (ESN) providing consulting and technical assistance across three core practices: Big Data & AI, Cybersecurity, and Cloud C&SI. The company deploys 350+ senior engineers as embedded consultants at client sites to execute strategic digital transformation projects for large French enterprise accounts (grands comptes). Services span data governance and AI implementation, cybersecurity and DevSecOps hardening, and cloud migration and cloud-native development with regulatory compliance expertise (RGPD, NIS2, DORA, AI Act).

Product overview

SquareOne is an agile IT Services Company (ESN) providing consulting and professional services across three core domains: Big Data & IA, Cybersécurité (Cybersecurity), and Cloud C&SI (Cloud Computing & Systems Integration). These three practices form the foundation of its service portfolio, each offering end-to-end capabilities from strategy and advisory through implementation, deployment, and operational support. The company serves major accounts (grands comptes) in sectors including finance, energy, public sector, healthcare, aerospace and defense, with a focus on complex, regulated, and high-impact digital transformation projects. Services are delivered through senior consultants who combine technical expertise with regulatory knowledge (DORA, AI Act, RGPD, NIS2) and are organized into specialized communities (Cloud, Data-IA, Cybersécurité) for knowledge sharing and career development.

Differentiator

Problem solved

Functional benefit

Products and services

• Big Data & IA (Data & Artificial Intelligence) Consulting Comprehensive data and AI consulting services covering data governance and regulatory compliance (RGPD, AI Act), industrial data pipelines, data analytics and business intelligence, and machine learning/applied AI for automating processes and optimizing performance. Targets enterprise clients in regulated industries seeking to transform data into a performance engine.
• Cybersecurity Consulting Cybersecurity consulting services including application security via DevSecOps, cloud security with encryption, micro-segmentation, real-time surveillance, and IAM, and regulatory compliance advisory for RGPD, NIS2, DORA, HIPAA, and PCI DSS. Targets enterprise clients in regulated industries (banking, energy, defense, healthcare) requiring cybersecurity hardening and incident response capabilities.
• Cloud C&SI (Cloud Computing & Systems Integration) Consulting Cloud transformation services including cloud migration strategy (public, private, hybrid), cloud-native application development using containers and serverless architectures, and cloud infrastructure management including provisioning, configuration, supervision, and DevOps automation. Includes responsible cloud practices such as eco-designed CI/CD pipelines and energy consumption monitoring. Targets enterprise clients undertaking large-scale cloud transformation.
• SI Ministry Modernization Program Landmark IT modernization engagement for a French ministry encompassing SI architecture redesign, legacy application migration to cloud, DevOps/Agile integration, stakeholder coaching, and ongoing application maintenance. The program involves 150+ IT consultants including 35+ SquareOne collaborators, demonstrating the company's capacity to deliver large-scale, multi-year public-sector transformation.

Quantifiable outcome

• 282 tonnes CO2e carbon footprint measured (FY2023)
• +3 more outcomes

Named customers14 records

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability9 records

Feature4 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Communauté du Coq Vert (Bpifrance / ADEME)coreStrategic or Co-development Partner · 1 January 2024SquareOne joined the Coq Vert community, a select network of companies committed to ecological and energy transition, initiated by Bpifrance and ADEME. Membership involves sharing best practices with committed companies, benefiting from expert eco-responsibility support, and reinforcing the ecological transition through a rigorous selection process.
• Sopra SteriaminorStrategic or Co-development Partner · 1 January 2024SquareOne collaborates with Sopra Steria on the HR Access training program, contributing to the professional development and skill building of its workforce as part of its structured approach to talent development.
• GreenFlexminorStrategic or Co-development Partner · 1 January 2024SquareOne participated in a Fresque Environnement & Santé workshop organized by GreenFlex at the École des Mines de Paris, exploring interactions between climate change, pollution, biodiversity loss, and human health under the One Health concept.
• ADEME (Agence de la Transition Écologique)minorStrategic or Co-development Partner · 1 January 2024SquareOne's participation in the Coq Vert community involves ADEME as a key partner in the initiative. SquareOne benefits from ADEME's expertise in ecological transition and shares its knowledge through the community ecosystem.
• StarTec InformatiquecoreStrategic or Co-development Partner · 1 July 2023SquareOne acquired StarTec Informatique in July 2023, a strategic milestone that strengthened SquareOne's positioning in the French ESN market. The acquisition aimed to build a new ETI (mid-sized enterprise) in Data & AI, Cybersecurity, and Cloud C&SI markets, expanding delivery capacity and client reach.

Scale indicators8 records

Recent moves9 records

Expansion highlights5 records

Broad incumbents

• CGI France: Global IT and business consulting services firm with a significant French operation focused on large enterprise digital transformation, systems integration, and managed services overlapping with SquareOne's Cloud C&SI practice.
• Accenture France: Global consulting and IT services firm with deep presence in French large enterprise and public sector, competing on the same Cloud, Data, and Cybersecurity transformation mandates. Sets the price and capability ceiling SquareOne must position against.
• Capgemini: Global IT services leader with a substantial French footprint, covering Cloud, Data/AI, and Cybersecurity at massive scale. Represents the upper bound of competitive pressure and the consolidation target for SquareOne's ETI ambition.
• Atos: European-headquartered IT services group with a large French presence in Cloud, Cybersecurity, and Digital transformation, serving many of the same grands comptes as SquareOne including public sector and energy clients.
• Sopra Steria: European IT services leader headquartered in France, operating in the same Data, Cybersecurity, and Cloud domains as SquareOne at much larger scale. SquareOne is already a subcontractor on Sopra Steria programs, illustrating the tiered competitive relationship.

Direct peers

• Talan: Paris-based international consulting and ESN with practices in Data, Cloud, and emerging technologies, serving large French accounts. Closely comparable to SquareOne in size, geographic origin, and target client profile.
• Wavestone: French-origin consulting firm with strong cybersecurity, Data/AI, and cloud transformation practices serving large French enterprises and public sector. Direct comparable in client overlap and consulting practice focus, though more management-consulting heavy.
• Devoteam: French-headquartered IT consulting firm with similar focus on Cloud, Data, and Cybersecurity for large enterprises. Directly comparable in positioning as a mid-sized French ESN targeting digital transformation, though at greater scale and with broader European footprint.
• Onepoint: French technology and transformation consultancy with practices spanning Data, Cloud, and Cybersecurity, targeting CAC40 and public sector. Comparable to SquareOne in target market and service mix, with a similar Bpifrance-style growth trajectory.

Emerging players

• Orange Business / Orange Cyberdefense: Telco-owned IT services and cybersecurity arm with strong presence in French enterprise and public sector. Comparable to SquareOne in cybersecurity and Cloud transformation delivery, with deeper resources and telco distribution leverage.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/SquareO70866548
• LinkedInlinkedin.com/company/square-one-fr

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Square-One