Square-One
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.
- Company typePrivate
- Founded2018
- HeadquartersBoulogne-billancourt, France
- Headcount51–100
- GTM typeB2B
- OfferingServices
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.
Square-One firmographics
Firmographics- 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
Square-One industry classification
Industry- 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
Where Square-One is headquartered
LocationHeadquarters
- HQ city
- Boulogne-billancourt
- HQ country
- France
- HQ region
- Europe
Offices1 record
Markets served
Square-One business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure
Revenue model
- 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.
- 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
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Enterprise consulting and IT transformation services — project-based professional services |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels4 records
Square-One product offering
Product offeringCore 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
Companies that use Square-One
Customer profileNamed customers14 records
Segments1 record
Ideal customer profiles2 records
Square-One technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability9 records
Feature4 records
Square-One partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core and minor.
- Communauté du Coq Vert (Bpifrance / ADEME)coreSquareOne 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 SteriaminorSquareOne 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.
- GreenFlexminorSquareOne 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)minorSquareOne'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 InformatiquecoreSquareOne 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
Square-One competitors and assessment
Company assessmentBroad 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
Square-One social profiles
Digital presenceSquare-One compliance and trust
Trust signalCompliance4 records
Square-One financial estimates
Financial estimateRevenue estimate
Valuation estimate
Square-One leadership team
Management profileNumber of profiles
Profiles1 record
Square-One subsidiaries and ownership
Company hierarchySubsidiaries1 record
Square-One funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Square-One M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Square-One
What does Square-One do?
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).
Is Square-One a public or private company?
Square-One is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Square-One founded?
Square-One was founded in 2018. It employs 51 to 100 people.
Where is Square-One based?
Square-One is headquartered in Boulogne-billancourt, France, in the Europe region.
How does Square-One make money?
Two revenue lines are on record. Professional IT Consulting Services are the primary driver. The others are staffing / Technical Assistance.
Who are Square-One's main competitors?
Broad incumbents on record are CGI France, Accenture France, Capgemini, Atos and Sopra Steria. Direct peers are Talan, Wavestone, Devoteam and Onepoint. Orange Business / Orange Cyberdefense is listed as an emerging player.
Does Square-One have an API?
No public API is recorded for Square-One.
What industry is Square-One in?
Square-One's product category is IT Consulting Services. Its primary akta.pro industry code is BPAHAEAF, Data, Analytics & AI Consulting, with a secondary code of BPAHAEAB, Enterprise Architecture & IT Operating Model. Its NAICS code is 54151 and its SIC code is 8742.