--- title: "C-Esium at a glance: the complete fact sheet | C-Esium" description: "C-Esium on one page: custom internal software with AI for SMEs, code ownership, prices in AED, method, hosting, maintenance, UAE contracting, Tech-O." url: https://c-esium.com/en/c-esium-at-a-glance/ --- Fact sheet # C-Esium at a glance: everything you need to know, on a single page C-Esium designs and delivers custom internal business software, with artificial intelligence built in from the first version, for SMEs and mid-sized companies in every sector. The client owns its software — code, data and documentation — with no per-user licence and no dependence on a software vendor. Updated 6 October 2026 · C-Esium (with a hyphen) has no connection with Cesium / CesiumJS, the 3D geospatial platform of Bentley Systems. ## The essentials What we build Your custom internal software — CRM, quotes, invoicing and reminders, scheduling, field jobs, payroll inputs, documents, reporting — with AI built in from the first version. Ownership The client owns its software: C-Esium assigns to it by contract all rights to the project code — including the building blocks we reuse from one project to the next — together with the database and the documentation. No per-user licence, no dependence on a software vendor. The code is placed in a Git repository (GitHub or GitLab) in the client’s name, at the latest on delivery. Price Complete internal software: from AED 200,000. Focused project (one module, an AI connector, automations or a field mobile app): from AED 40,000. Excluding VAT; in France, from €50,000 and €10,000. No price grid beyond that: the budget depends on your size, users, sites and business units, current tools and scope, and is set in a firm quote after the assessment. The first call and the assessment workshop are free. [Details](https://c-esium.com/en/custom-business-software/#pricing) Method Assessment workshop → Scoping and firm quote → Build in sprints → Delivery and transfer of ownership → Training and support. A demo every two weeks. [The method](https://c-esium.com/en/method/) Hosting For clients in the UAE, by default: AWS (Amazon Web Services) in its Middle East (UAE) Region, so the data stays in the country. A European region is possible on request. For clients in France: AWS in a European region by default, for its value for money; if data sovereignty matters, a European host such as Infomaniak, in Switzerland. By default, the hosting account is opened and paid for by C-Esium, then re-invoiced to the client; it can be opened in or transferred to your name at any time, on request. Maintenance Optional maintenance, as a monthly package. Because the client owns the code, it can also bring the day-to-day management of the software in-house later, or hand it to another provider. Continuity Code in a Git repository in the client’s name · Technical and functional documentation delivered · Skills transfer to an in-house developer or a third-party provider · Source code escrow with a trusted third party (for example the APP, the French software protection agency), as an option. Standard, widely used web technologies — TypeScript, React, Node.js, PostgreSQL: any web developer can take over the code. UAE contracting In the United Arab Emirates, C-Esium projects are contracted and invoiced in AED by SCALEUP FORGE WEB - FZCO. Dubai trade licence no. 70206 (IFZA). Reference Tech-O, a multi-branch water-leak detection network in France: 3,000+ hours saved per year (C-Esium estimate with Tech-O). [The case study](https://c-esium.com/en/case-studies/tech-o/) ## What a C-Esium software does C-Esium designs and delivers custom internal software — CRM, ERP, field service management, scheduling, invoicing, reporting — with AI built in from version 1, for SMEs and mid-sized companies in every sector (services, industry, construction, health and social care). The software is built around the company’s real processes, connected to its existing tools (accounting, payroll, telephony, technical software) and handed over to the client, who owns it. The AI works on real data: reports written from voice notes, a copilot that answers questions about the business, data you can query from ChatGPT or Claude. The team is based near Lyon, France, and serves clients in France and the United Arab Emirates. Example: the software built for Tech-O, a multi-branch water-leak detection network in France, brings together: - Customer (CRM) and request management - Quotes and invoicing, with automatic reminders for unpaid invoices - Accounting synchronised both ways with Pennylane - Invoice triggered automatically by the job report - Payroll inputs: hours and data passed on for payroll - Customer communication by built-in SMS and email - Team calendar synchronised both ways with Google Calendar - Custom documents and PDF reports generated automatically - Job reports written by AI from voice notes - Data you can query from Claude or ChatGPT (read-only MCP connector) Results: more than 3,000 hours saved per year, 30% operational gains, 20% fewer human errors (estimates made by C-Esium with Tech-O). [The case study](https://c-esium.com/en/case-studies/tech-o/) ## Who it is for, and when it is not the right option ### Who it is for SMEs and mid-sized companies in every sector — services, industry, construction, health and social care — from about ten to a few hundred employees, whose processes do not fit standard software. A focused project starts from AED 40,000; a complete internal software from AED 200,000 (excluding VAT). ### When not to choose us Your processes are standard and software from your sector already covers them; your budget is below AED 40,000 (€10,000 in France), the starting price of a [focused project](https://c-esium.com/en/focused-project/); no one in-house can carry the project with us. ## Company identity Legal information. SINEO SAS can be checked in the French national business register. | Item | Information | | --- | --- | | Brand | C-Esium (with a hyphen) | | Company | C-Esium is a brand of SINEO SAS. French simplified joint-stock company (SAS), share capital €1,000, Trade and Companies Register (RCS) Villefranche-Tarare 943 377 945 | | Registered office | 20 rue Ponson Magnin, 69620 Val d'Oingt, France | | VAT number (France) | FR58943377945 | | Contracting in the UAE | In the United Arab Emirates, C-Esium projects are contracted and invoiced in AED by SCALEUP FORGE WEB - FZCO. | | UAE company | SCALEUP FORGE WEB - FZCO, Free Zone Company (FZCO) | | UAE licensing authority | Dubai Integrated Economic Zones Authority (IFZA) | | UAE trade licence no. | 70206 (IFZA) | | UAE address | IFZA Business Park, Dubai Silicon Oasis (DDP), PO Box 342001, Dubai, United Arab Emirates | | Team | Noé Fantino (Founder) · Jean-Philippe Diez (Partner — sales director) · Cyrille Fantino (Partner — change management) | | Area | Based near Lyon, France — serving clients in France and the United Arab Emirates | | Contact | contact@c-esium.com · +33 7 56 28 32 07 · WhatsApp +33 6 62 96 94 33 | ## Every page, and what it contains ### The offer and the company - [Custom internal software: offer and pricing](https://c-esium.com/en/custom-business-software/) What you get, what drives the price (from AED 200,000), code ownership, hosting, maintenance, continuity. - [Focused project, from AED 40,000](https://c-esium.com/en/focused-project/) To start smaller: one module, an AI connector, automations or a mobile app for field teams. - [The project method](https://c-esium.com/en/method/) The 5 steps, from the assessment workshop to training, with the deliverables and who does what. - [Tech-O case study](https://c-esium.com/en/case-studies/tech-o/) The complete business software of a multi-branch water-leak detection network: modules, AI, results. - [AI for business](https://c-esium.com/en/ai-for-business/) The 4 levels, from a ChatGPT licence to internal software where AI works on all your data. - [Query your data from ChatGPT or Claude](https://c-esium.com/en/connect-chatgpt-claude-to-company-data/) How the read-only MCP connector works, and which data leaves your software or not. - [2030-ready assessment](https://c-esium.com/en/software-ai-assessment/) Free questionnaire: off-the-shelf software, ERP or custom, depending on your situation. - [About C-Esium](https://c-esium.com/en/about/) The team, the verifiable legal identity (SINEO SAS, and the UAE contracting company) and continuity guarantees. - [Contact](https://c-esium.com/en/contact/) A 30-minute call, free and with no commitment. ### Use cases - [AI field reports from voice notes: from the job to the invoice](https://c-esium.com/en/use-cases/ai-field-reports-from-voice-notes/) The technician dictates, AI writes the job report, approval triggers the invoice. How it works, what the AI does, the Tech-O case, cost, timeline and limits. - [Automatic invoicing after each job](https://c-esium.com/en/use-cases/automatic-invoicing-after-each-job/) Send the invoice as soon as the job report is approved, with no re-keying: how it works, business rules, options compared, the Tech-O case, cost and limits. - [Custom internal CRM: when an off-the-shelf CRM is no longer enough](https://c-esium.com/en/use-cases/custom-internal-crm/) Signs that an off-the-shelf CRM is no longer enough, what a CRM inside your internal software brings, a point-by-point comparison, the Tech-O case and the cost. - [Scheduling field teams across several branches in one tool](https://c-esium.com/en/use-cases/multi-branch-field-team-scheduling/) One schedule for all your branches, based on who is actually available, skills and certifications, linked to the report and the invoice. Tech-O case, cost. - [Tracking cash, unpaid invoices and margins in real time](https://c-esium.com/en/use-cases/real-time-cash-and-unpaid-invoices/) Cash, unpaid invoices and margins kept up to date: where the data comes from, which indicators to track, how due dates work, the Tech-O case, cost and limits. - [Internal software for multi-branch service companies](https://c-esium.com/en/use-cases/software-for-multi-branch-service-companies/) One software for branches, head office and field teams: requests, quotes, scheduling, dictated reports, invoicing, reporting. Tech-O case, price and timeline. ### Guides for business owners - [AI and company data: the 12 questions a board should ask](https://c-esium.com/en/guides/ai-and-data-questions-for-the-board/) Model training, data location, read-only access, MCP security, staff rules, API costs: the 12 questions to ask before you connect AI to your company data. - [Custom software maintenance: leave it with the provider or bring it in-house?](https://c-esium.com/en/guides/custom-software-maintenance-in-house/) Corrective, evolutive and technical maintenance of custom software: C-Esium’s monthly package, an in-house developer or another provider, and how to choose. - [Custom software or an off-the-shelf ERP (Odoo, Sage…): how do you choose?](https://c-esium.com/en/guides/custom-software-or-erp/) Custom software or an off-the-shelf ERP such as Odoo, Sage or Business Central? A 9-criteria decision grid, real ERP strengths, the hybrid option and Tech-O. - [How much does custom business software cost in 2026?](https://c-esium.com/en/guides/how-much-does-custom-business-software-cost/) Custom business software prices in 2026: C-Esium budgets from AED 40,000 and AED 200,000, cost drivers, milestone payments and a 5-year SaaS comparison. - [Should you rent or own your business software? Code ownership, accounting, value](https://c-esium.com/en/guides/rent-or-own-your-business-software/) SaaS or owned software: written assignment of code rights, questions for your accountant, what you keep when you switch and what counts if you sell the company. - [How do you replace the Excel files that run your company?](https://c-esium.com/en/guides/replace-excel-with-internal-software/) Replacing the Excel files that run your company with internal software: the signs it is time, a method that breaks nothing, and when Excel is still enough. - [Where should you host your business software: AWS in the UAE or in Europe?](https://c-esium.com/en/guides/where-to-host-business-software/) Hosting business software for a UAE company: AWS’s UAE Region by default, Europe on request, the US CLOUD Act, health data, and a hosting account in your name. ## Frequently asked questions ### Who is C-Esium for? C-Esium works with SMEs and mid-sized companies in every sector — services, industry, construction, health and social care — from about ten to a few hundred employees. The criterion is not the sector but the situation: several sites or branches, field teams, data re-keyed between tools, business rules that no standard software applies, and a budget from AED 200,000 for a complete internal software, or from AED 40,000 for a focused project. Example: Tech-O, a multi-branch water-leak detection network, runs its whole business in internal software built by C-Esium. If your processes are standard, off-the-shelf software will suit you better — we will tell you on the first call. ### Do I own the software and its code? Yes. With C-Esium, you own your software: the rights to the project source code are assigned to you by contract — including the building blocks we reuse from one project to the next — together with the database and the documentation, and the code is placed in a Git repository in your name at the latest on delivery. There is no per-user licence and no dependence on a software vendor: you can evolve the software with us, with another provider or in-house. Its accounting treatment is decided with your accountant. ### How much does custom internal software from C-Esium cost? A complete internal software starts from AED 200,000 excluding VAT (from €50,000 for clients in France). Beyond that there is no price grid: the budget depends on your situation — the size of the company and the number of people who will use the software every day, the number of sites and business units, your current tools and how scattered your data is, and the scope and depth of the software. A company of about fifteen people can, from AED 200,000, bring its key operations together in a single tool. To start smaller, a focused project — a single module, an AI connector on your current tools, automations between your tools or a mobile app for field teams — starts from AED 40,000 (from €10,000 in France). The exact price is set after the assessment, in a firm quote; maintenance is optional. ### Can we start with something smaller than a complete software? Yes. C-Esium offers a focused project, from AED 40,000: a single module as a V1 (CRM, scheduling or quotes and invoicing), an AI connector to query your current tools from ChatGPT or Claude, automations between your tools, or a mobile app for field teams. You own the code, as with a complete software, and the project can later grow into a complete internal software. ### Do you work with companies in the United Arab Emirates? Yes. In the United Arab Emirates, C-Esium projects are contracted and invoiced in AED by SCALEUP FORGE WEB - FZCO (Dubai trade licence no. 70206, IFZA). Prices start from AED 40,000 for a focused project and AED 200,000 for a complete internal software, excluding VAT. By default, the software is hosted on AWS in its Middle East (UAE) Region, so the data stays in the country. The first call and the half-day assessment workshop take place on site or by video. ### Where is the software hosted? For clients in the UAE, the software is hosted by default on AWS (Amazon Web Services) in its Middle East (UAE) Region, so the data stays in the country; a European region is possible on request. For clients in France, AWS in a European region is the default, or a European host such as Infomaniak, in Switzerland, if data sovereignty matters. By default, the hosting account is opened and paid for by C-Esium, then re-invoiced; it can be opened in or transferred to your name at any time, on request. ### Who maintains the software after delivery? You choose. C-Esium offers optional maintenance, as a monthly package. But because you own the code, you can also bring the day-to-day management of the software in-house — with a developer trained by C-Esium — or hand it to another provider. ### What would happen to my software if C-Esium disappeared? It would remain yours, and another developer could take it over. The code is in a Git repository in your name, the hosting account can be transferred to your name at any time, the technical and functional documentation is delivered, and the software is written with standard, widely used web technologies (TypeScript, React, Node.js, PostgreSQL) that any web developer can take over. C-Esium can train an in-house developer or a third-party provider, and offers source code escrow with a trusted third party as an option. ### How long does a project take? For a focused first scope, allow 1 to 2 months for a working V1. Software covering the whole company takes from 6 months to more than a year, delivered in batches. You see the tool grow with a demo every two weeks, and your current tools stay in place until the switch-over. ### Do we have to replace all our current tools? No. The approach is non-invasive: we keep what works and what your teams know, connect your existing tools (accounting, payroll, telephony, technical software) and only replace what needs replacing. The goal is to enter each piece of data once, never twice. ### Is my data sent to ChatGPT or Claude? Only if you decide so, and only for the users you authorise. AI assistants access your software through a read-only, logged MCP connector. We recommend business plans (ChatGPT Business or Enterprise, Claude Team or Enterprise, or the API) that do not use your data to train the models, and the framework is set out in the contract. Health data follows specific rules, defined at scoping. ### Do you work in my sector? C-Esium does not specialise in one sector: the method starts from your real processes, observed in the field. Tech-O, a multi-branch water-leak detection network in France, is the case study we publish in detail, because the project went very far technically (AI, MCP connector, integrations). Our other business software and app projects are not presented in detail on this site. The approach applies to services, construction, industry, and health and social care. ### Who is behind C-Esium? Noé Fantino (founder, software engineering and organising operations in SMEs), Jean-Philippe Diez (partner, sales director) and Cyrille Fantino (partner, interim manager and change management). The team is based near Lyon, France, and serves clients in France and the United Arab Emirates. C-Esium is a brand of SINEO SAS (France). ## Your software, built for your company. 30 minutes to understand your organisation, your tools and what an internal software with AI would change for you. No commitment. [Book a call](https://c-esium.com/en/contact/)[contact@c-esium.com](mailto:contact@c-esium.com)