Your web projects enhanced by AI

Castelis designs, secures and operates your digital solutions, from custom applications to AI agents in production. A single point of contact for your most ambitious projects, in France and internationally.

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+500 projects delivered

Since 1999, in France and internationally

+5 business sectors

Dev, cyber, cloud, data and UX under one roof

Certified security

ISO 27001:2022, GDPR and CyberVadis Platinum Medal 2025

# They chose our expertise

/ Our Clients

# Our Expertise

/ From concept to production

A single partner to move from use case to a production-ready product with measurable results, controlled compliance and optimised costs.

Custom Development

Websites, business applications, ERP and mobile. Solutions that integrate into your processes and evolve with your business needs.

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Cybersecurity

Governance, technical security, detection and response. ISO 27001:2022 certified, GDPR compliant and CyberVadis Platinum 2025 recognised.

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Cloud Infrastructure

Cloud migration, managed services and optimisation, with 24/7 monitoring, guaranteed SLAs and data hosted in France.

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Data & AI

Data pipelines, AI agents and MLOps. From architecture to industrialisation, for use cases with measurable impact on your business.

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Your challenges, our methodologies

Migrate or optimise your Cloud

Reduce costs and gain agility with a cloud infrastructure tailored to your needs.

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Secure & monitor your IS

Protect your systems, anticipate incidents and stay in control of your IT security.

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Leverage Data & AI

Transform your data into performance drivers with operational AI solutions.

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Build or optimise a business application

Tools that adapt to your business processes and evolve with your needs.

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Build or optimise a website

An online presence that drives traffic, engages your visitors and converts.

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Successfully navigate e-invoicing reform

Anticipate the legal requirement and implement a compliant solution without business disruption.

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# OUR APPROACH

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An integrated approach, from scoping to operations

Castelis is involved throughout the entire lifecycle of your digital projects: design, development, security and optimisation. Every project is scoped, managed and delivered with rigour, by multidisciplinary teams engaged from start to finish.

Deadlines met, budgets controlled
Teams dedicated to your context
A single point of contact from design to operations

Talk to an expert

An integrated approach, from scoping to operations

+500

Projects delivered

Since 1999

24/7

Run & SOC

Continuous monitoring

≥99,9%

Guaranteed SLA

High availability

Business sectors

Multi-industry

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Dedicated experts at every stage of your project

250 professionals with complementary profiles: developers, cloud architects, cyber experts, data scientists and designers, who share a common commitment: understanding your context before delivering. Each engagement is led by experienced professionals, involved from design through to operations.

Talk to an expert

Dedicated experts at every stage of your project

# PARTNERS

/ An ecosystem to go further, faster

We work with recognised ecosystems to build solid solutions: CMS/DXP, cloud tools, data platforms and collaborative services. These partnerships accelerate your projects, secure integrations and simplify governance. You benefit from proven best practices, modern tools and lasting support to evolve your product.

# They trust us

Eric Pagan

Chief Financial Officer • Groupe Qualiconsult

“ Castelis demonstrated its flexibility, its commitment to projects and its project management expertise. This is what naturally led us to them. ”

Fabrizio Gallina

Digital IT Manager • Prévoir

“ What was truly appreciated with the Castelis Dev Team was their level of commitment, their skills, their responsiveness and their mindset. ”

#INSIGHTS

/ Resources

Cloud Artificial Intelligence

Castelis Team time_grey

7 min

05 May 2026

From AIOps to AgentOps: When AI No Longer Advises, It Acts

AI Shifts from Copilot to Pilot AIOps has transformed IT operations by bringing prediction and intelligent correlation. Anomaly detection, automated…

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Artificial Intelligence Cloud

Castelis Team time_grey

8 min

29 Apr 2026

From DevOps to AIOps: How AI is Transforming IT Operations

DevOps Overwhelmed by Modern Complexity DevOps has revolutionized IT operations since 2010: Dev+Ops collaboration, automation, continuous delivery. But a new…

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Artificial Intelligence Custom development

Castelis Team time_grey

16 min

18 Feb 2026

10 AI Agents, 4 Hours, $30: A Field Report on OpenClaw

Architecture, timeouts, mémoire, orchestration : les leçons techniques d’un pipeline multi-agent déployé en conditions réelles.

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View all articles

CONTACT

Let's talk about your project

Describe your need to us, and our experts will get back to you within 24 hours.

Technical expertise

25+ years of experience, certified with leading technology partners

Proven methodology

500+ projects delivered, 95% client satisfaction, deadlines met

Ongoing support

Responsive maintenance, team training, 24/7 monitoring

Satisfaction rating

4.8/5

Your web projects enhanced by AI

+500 projects delivered

+5 business sectors

Certified security

/ Our Clients

/ From concept to production

Custom Development

Cybersecurity

Cloud Infrastructure

Data & AI

Your challenges, our methodologies

Migrate or optimise your Cloud

Secure & monitor your IS

Leverage Data & AI

Build or optimise a business application

Build or optimise a website

Successfully navigate e-invoicing reform

/ An integrated approach, from scoping to operations

Projects delivered

Run & SOC

Guaranteed SLA

Business sectors

/ Dedicated experts at every stage of your project

/ An ecosystem to go further, faster

/ Resources

From AIOps to AgentOps: When AI No Longer Advises, It Acts

From DevOps to AIOps: How AI is Transforming IT Operations

10 AI Agents, 4 Hours, $30: A Field Report on OpenClaw

Let's talk about your project

Why choose us?

Technical expertise

Proven methodology

Ongoing support

/
An integrated approach, from scoping to operations

/
Dedicated experts at every stage of your project