Castelis
Castelis is a French IT services firm designing and operating tailor-made information systems — custom software development, AI agents, managed cybersecurity (SOC), and cloud infrastructure — for mid-market and enterprise clients in France and internationally.
- Company typePrivate
- Founded1999
- HeadquartersIvry-sur-seine, France
- Headcount51–100
- GTM typeB2B
- OfferingServices
What Castelis does
Castelis, founded in 1999 and headquartered in Ivry-sur-Seine, France, is a private SAS IT services company specializing in the design, development, deployment, and maintenance of tailor-made information systems. Since 2022 it has operated as a core subsidiary of Hunik Group, a French diversified digital services conglomerate encompassing seven specialist entities (Castelis, Access it, Sudalis, Treez, Ylly, Yoozly, Everbrand) with approximately 250 employees and additional delivery presence in the Philippines through Castelis Asia Inc. (Manila, 2020). Its portfolio comprises five core service lines: custom development (business applications, websites, ERP audit/integration, UX/UI design), custom AI solutions (AI agents, automations, data pipelines, MLOps), managed cybersecurity including a 24/7 SOC, infrastructure and cloud services (migration, managed services, FinOps) across Microsoft Azure, AWS, and Google Cloud, and remote staff augmentation.
The company monetizes primarily through professional services and managed services contracts — project-based, quote-driven pricing aligned to scope, team composition, and duration, often structured as multi-year engagements. Go-to-market is enterprise field sales plus thought leadership (technical blog, LinkedIn, YouTube, webinars) and event participation (Sitecore Symposium, Sitecore User Group France). Its target buyers are mid-market and enterprise companies in France and internationally across transportation, cosmetics, pharmaceuticals, professional services, asset management, energy, retail, and media; named enterprise clients include L'Oréal, Kérastase, Sanofi, SNCF, Deloitte, Qualiconsult, Apave, Quadient, and Comgest. Differentiation rests on ISO 27001:2022 certification, CyberVadis Platinum Medal 2025 (983/1000), data hosted in France, ≥99.9% SLA on managed services, and 25+ years of accumulated delivery experience on platforms such as Sitecore, Contentstack, Microsoft Sentinel, and Cloudflare.
Castelis firmographics
Firmographics- Name
- Castelis
- Legal name
- CASTELIS
- Website
- https://castelis.com
- Company type
- Private
- Founded year
- 1999
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Castelis is a French IT services firm designing and operating tailor-made information systems — custom software development, AI agents, managed cybersecurity (SOC), and cloud infrastructure — for mid-market and enterprise clients in France and internationally.
- Ownership category
- akta.pro rank
Where Castelis is headquartered
LocationHeadquarters
- HQ city
- Ivry-sur-seine
- HQ country
- France
- HQ region
- Europe
Offices2 records
Markets served
Castelis business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure
Revenue model
- Custom Software Development Services: Design, development, deployment and maintenance of custom business applications, websites, and digital solutions for industrial and service sector clients. Projects are scoped, delivered on time with budget control.
- Managed IT Infrastructure Services: Ongoing managed services including cloud infrastructure management, 24/7 supervision and monitoring, technical maintenance (TMA), with SLA guarantees.
- Cybersecurity Services: Security operations center (SOC) managed services, technical security audits, governance and compliance services, and dedicated cybersecurity staffing.
- AI and Data Solutions: Data pipelines, AI agents, MLOps and industrializing AI solutions from architecture to production with measurable business impact.
- Remote Staff Augmentation: Remote IT staffing and staff augmentation to strengthen client teams without recruitment delays.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom project-based pricing tailored to scope and complexity |
Go-to-market motion3 records
Distribution channels3 records
Marketing channels10 records
Castelis product offering
Product offeringCore offering
Castelis is a French IT services company that designs, develops, deploys, and maintains tailor-made information systems for mid-market and enterprise clients. Its core offerings span custom software development (business applications, websites, ERP integration, UX/UI design), AI solutions (custom agents, automations, MLOps, data pipelines), cybersecurity (managed SOC, GRC, technical audits), and managed cloud infrastructure (migration, FinOps, performance optimization with 24/7 monitoring). Projects are scoped, quoted, and delivered on time with budget control, often complemented by remote staff augmentation services.
Product overview
Castelis is an IT services company offering custom development, cloud infrastructure, cybersecurity, and AI/data solutions. The portfolio includes custom development services (applications, websites, ERP integration, UX/UI design), custom AI solutions (AI agents and automations, data pipelines, MLOps), managed SOC and cybersecurity services (GRC, audits, expertise staffing), and infrastructure services (FinOps, performance, managed services). The company operates as a services provider rather than a packaged software vendor, delivering solutions through technology partnerships with Sitecore, Contentstack, Microsoft Azure/AWS/Google Cloud, Cloudflare, Microsoft Sentinel, Chronos, and DMARC Advisor.
Differentiator
Problem solved
Functional benefit
Products and services
- Custom Development Services
Quantifiable outcome
- ≥99.9% SLA guaranteed for high availability
- +4 more outcomes
Companies that use Castelis
Customer profileNamed customers18 records
Segments3 records
Ideal customer profiles2 records
Castelis technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration10 records
AI capability7 records
Feature4 records
Castelis partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered core and minor.
- CloudflarecoreCloudflare partnership for network security and application performance. Castelis was named Cloudflare MSP Partner of the Year 2022, demonstrating deep integration expertise in deploying Cloudflare's security and performance solutions.
- Microsoft AzurecoreStrategic technology partnership for cloud infrastructure using Microsoft Azure platform. Azure certifications held by team members.
- AWS (Amazon Web Services)coreAWS cloud platform partnership providing flexible deployment options across Amazon Web Services infrastructure.
- Google CloudcoreGoogle Cloud platform partnership for cloud infrastructure and data/AI solutions.
- SitecorecoreSitecore DXP (Digital Experience Platform) partnership for customer experience management, content personalization and headless CMS implementations. Castelis has deployed multiple Sitecore implementations for major clients including L'Oréal, and organized Sitecore User Group France events.
- ContentstackcoreContentstack headless CMS partnership for delivering content across multiple channels with API-first architecture.
- Microsoft SentinelcoreMicrosoft Sentinel SIEM cloud partnership for cyber threat detection and response solutions.
- Hunik GroupcoreHunik Group is the parent organization of Castelis. Formed in 2022, Hunik Group encompasses 7 specialist companies (Castelis, Access it, Sudalis, Treez, Ylly, Yoozly, Everbrand) with presence in France (Paris, Lille, Nantes, Lyon, Toulouse) and Asia (Philippines). Castelis specializes in custom solution development with expertise in finance, e-commerce and accounting management.
- LucernysminorJoint venture 'La Tech Agency' with Lucernys for digital technology projects and shared expertise.
- Welcome to The JungleminorWelcome to The Jungle is used by Castelis as a recruitment platform for job postings and employer branding.
- HubSpotminorHubSpot CRM and marketing automation platform used by Castelis for customer relationship management and marketing operations.
Scale indicators8 records
Recent moves7 records
Expansion highlights6 records
Castelis competitors and assessment
Company assessmentDirect peers
- Devoteam: French-headquartered IT services firm with comparable mid-market and enterprise focus on cloud, cybersecurity, data/AI and digital transformation. Closest direct peer given similar size, customer profile and service portfolio.
- Talan: Paris-based international consulting and tech services group offering custom development, cloud, data and AI to mid-market and enterprise clients in France. Overlaps closely with Castelis on enterprise digital transformation and data/AI capabilities.
- Smile (Smile Open Source Solutions): French digital services and open-source specialist covering custom development, cloud, cybersecurity and CMS/DXP (including Sitecore). Comparable scale and customer profile to Castelis with strong French mid-market presence.
Broad incumbents
- Sopra Steria: One of the largest French IT services firms with broad capabilities in custom development, cloud, cybersecurity, AI/automation and ERP across enterprise and public sector. Competes with Castelis on large enterprise and public sector RFPs.
- Capgemini: Global IT services giant with significant French operations covering custom development, cloud, cybersecurity, data/AI and digital engineering. Larger-scale competitor that often competes for the same enterprise accounts as Castelis.
- Atos: Major French-headquartered IT services provider with managed infrastructure, cybersecurity, cloud and digital transformation offerings. Overlaps with Castelis in cybersecurity services and managed infrastructure.
- Accenture France: Global consulting and IT services leader with large French practice spanning custom development, cloud, security and AI/automation. Competes for the largest enterprise and multinational accounts targeted by Castelis.
- Alkera (formerly AKKA Technologies / Capgemini Engineering): European engineering and digital services firm with French roots and broad digital transformation, cloud and embedded systems capabilities. Comparable in scale and customer profile to Castelis at the group level.
- Onepoint: French-headquartered consulting and technology services group covering digital transformation, cloud, cybersecurity and data/AI for large enterprise and public sector. Increasingly overlaps with Castelis on enterprise transformation mandates.
Emerging players
- Orange Cyberdefense: Specialist cybersecurity subsidiary of Orange providing managed SOC, threat detection and incident response across France and Europe. Direct overlap with Castelis' managed SOC and cybersecurity services line.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks3 records
Key highlights7 records
Customer concentration
Castelis social profiles
Digital presenceCastelis compliance and trust
Trust signalCompliance2 records
Castelis financial estimates
Financial estimateRevenue estimate
Valuation estimate
Castelis leadership team
Management profileNumber of profiles
Profiles1 record
Castelis funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Castelis 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 Castelis
What does Castelis do?
Castelis is a French IT services company that designs, develops, deploys, and maintains tailor-made information systems for mid-market and enterprise clients. Its core offerings span custom software development (business applications, websites, ERP integration, UX/UI design), AI solutions (custom agents, automations, MLOps, data pipelines), cybersecurity (managed SOC, GRC, technical audits), and managed cloud infrastructure (migration, FinOps, performance optimization with 24/7 monitoring). Projects are scoped, quoted, and delivered on time with budget control, often complemented by remote staff augmentation services.
Is Castelis a public or private company?
Castelis is a private company. It is classified as corporate owned and is currently operating.
When was Castelis founded?
Castelis was founded in 1999. It employs 51 to 100 people.
Where is Castelis based?
Castelis is headquartered in Ivry-sur-seine, France, in the Europe region.
How does Castelis make money?
Five revenue lines are on record. Custom Software Development Services are the primary driver. The others are managed IT Infrastructure Services, cybersecurity Services, AI and Data Solutions and remote Staff Augmentation.
Who are Castelis's main competitors?
Direct peers on record are Devoteam, Talan and Smile (Smile Open Source Solutions). Broad incumbents are Sopra Steria, Capgemini, Atos, Accenture France, Alkera (formerly AKKA Technologies / Capgemini Engineering) and Onepoint. Orange Cyberdefense is listed as an emerging player.
Does Castelis have an API?
No public API is recorded for Castelis.