Retail & commerce
Loyalty apps, click & collect, in-store sales tools. We have delivered for national retailers including Decathlon.
In short
55 · agency is an independent French digital studio founded in 2013, with its Paris office at 33 rue La Fayette in the 9th arrondissement. We design and build iOS and Android applications, premium websites and custom AI systems.
More than 150 projects delivered and 80+ apps published on the App Store and Google Play. Budgets from €15,000 for a mobile MVP. Free written proposal within 24 hours, in English or French.
Working with us from abroad
A European studio, without the friction.
Hiring a development partner in another country usually means three headaches: legal exposure, time-zone lag and language. Here is how each one is handled.
- EU data residency. Hosting in France or the EU, no transfer outside the Union to justify.
- GDPR by default. Processing records, legal basis and retention documented at scoping, not retrofitted.
- English-speaking team. Meetings, documentation, code comments and contracts in English.
- Overlapping hours. Full overlap with Europe and the UK, an afternoon window with US Eastern.
- EU contract law. IP transfer, liability and reversibility enforceable in an EU court.
- Public pricing. Our rate ranges are published, not hidden behind a form.
Paris office
55 · agency33 rue La Fayette
75009 Paris
France
Phone:
+33 7 56 84 91 14
Email:
hi@55.agency
Hours:
Monday to Friday, 9 am – 7 pm CET
Métro Cadet (line 7) and Grands Boulevards (lines 8 and 9). Ten minutes on foot from Gare du Nord — two hours fifteen from London St Pancras.
Where our experience
runs deepest.
We do not approach an industrial field tool the way we approach a consumer app. These are the domains where we have the most delivered work behind us.
Finance & insurance
Onboarding journeys, customer portals, strong authentication, core-system integration. Security and auditability handled from scoping.
Travel, hospitality & luxury
Booking, digital concierge, multilingual journeys and seasonal load peaks — a speciality of our Côte d'Azur office.
SaaS & startups
MVP in 4 to 8 weeks to validate the market, then scaling in step with your funding rounds.
Industry & logistics
Field applications with genuine offline mode, barcode and NFC scanning, ERP integration — the core of our Lyon office.
AI-enabled products
Assistants grounded in your data, document automation and autonomous agents. See our AI expertise.
Paris, Nice, Lyon.
Projects are run from the office closest to you, with one team and one rate card. The detailed French-language pages for each city are linked below.
Paris
Startups, scale-ups and the digital teams of large groups. Retail, finance, media and luxury.
33 rue La Fayette, 75009 ParisNice · Côte d'Azur
Tourism, hospitality, real estate and yachting. Close to Sophia Antipolis and Monaco.
55 Promenade de la Plage, 06800 Cagnes-sur-MerLyon
Industry, healthcare, logistics and distribution across the Auvergne-Rhône-Alpes region.
48 rue des Charmettes, 69100 VilleurbanneFrequently asked questions
Do you work with clients outside France?
Yes — a significant share of our work comes from Europe, the United Kingdom, Switzerland and North America. Project meetings run in English, documentation and code comments are written in English on request, and contracts can be issued in English.
For North American clients we keep a guaranteed overlap window each afternoon, Paris time.
Why choose a French agency rather than an offshore team?
Three practical reasons rather than patriotic ones.
- Data stays in the EU. No international transfer to justify, no Standard Contractual Clauses to negotiate, GDPR compliance by default.
- Time zone. Paris overlaps the full working day with the rest of Europe and half of it with the US East Coast — problems get solved the same day, not the next.
- Same legal framework. Contracts, IP transfer and liability under EU law, enforceable in an EU court.
Our day rates sit above offshore rates and below London or Berlin agency rates.
What are your rates?
Fixed-price projects start at €15,000 for a mobile MVP, €35,000 to €80,000 for a full iOS and Android application, and €8,000 for a premium website. Time-and-materials engagements are quoted per profile.
Full ranges are public on our pricing page — we do not hide them behind a contact form.
Who owns the intellectual property?
You do, in full. IP transfer is contractual and total: source code, designs, and the store accounts, which are opened in your company's name. Code ships to your own Git repository with build and deployment scripts.
How do we start?
A 30-minute call to qualify the need, then a written proposal within 24 hours. If the project goes ahead, we run a paid scoping workshop (1 to 2 weeks) that produces a firm scope and a firm price. No open-ended time-and-materials by default.
Can you sign an NDA?
Yes, before any detailed discussion, and we can work under your own template. We routinely sign confidentiality agreements with enterprise clients and are used to security reviews, penetration tests and reversibility clauses.
Related pages
Working from abroad?
Let's talk — proposal within 24 hours.
A 30-minute call in English is enough to frame the scope and give you a reliable budget range.