About Mag&Cie
Your technology partner since 2015
Mag&Cie is a technology consulting firm founded in 2015, specializing in CTO/CPO advisory for companies of all sizes — from early-stage startups to Fortune 500 enterprises. Our expertise combines strategic vision with deep technical skills to help our clients structure, accelerate and secure their technology growth.
What we do
Six practice areas, one bar: shipping what stands up in production.
Fractional tech leadership
Part-time CTO / CPO — scoping, arbitration, hiring, architecture review. We commit long-term, not through a report.
Web and mobile development
Web apps, SaaS, iOS and Android apps shipped end to end — design, code, security, store publishing.
AI integration & agents
Sovereign AI, business agents, MCP, RAG and no-code automations. We prioritize real impact over shiny demos.
Product leadership
Product scoping, roadmap, prioritization, metrics. We align ambition, budget and what the tech can really ship.
Cybersecurity & CISO
Posture audit, GDPR, NIS2, prioritized remediation plan. A part-time CISO for small businesses without an IT department.
Scoping & PoC
MVPs, application PoCs, acceptance testing, technical due diligence. A short deliverable, a clear decision.
Our Values
Pragmatism
Concrete, actionable solutions — not PowerPoint consulting. Every recommendation is designed to be implemented.
Transparency
Direct and honest communication, no unnecessary jargon. You always know where your project stands.
Technical Excellence
High standards, best practices and continuous technology watch. Quality is non-negotiable.
Commitment
Total involvement in every mission. Your success is our priority.
Key Figures
Recent case studies
4 flagship cases — 2 named (Lirix, MyOpenSpot), 2 anonymized.
Lirix
Social reading app — solo, cross-platform
DiscoverMobile appMyOpenSpot
iOS + Android mobile app — open-places map and Find each other mode
DiscoverPoC → prodVeterinary SaaS (anonymized)
2-sided platform + AI concierge (MCP) + OAuth2/HMAC API
DiscoverGroup SMBConstruction group (anonymized)
AI transition — audit + guidebook + 3 pilots + sovereignty
DiscoverWhat sets us apart
What makes the engagement readable on the client side.
Strict independence
No license reselling, no disguised commercial partnerships. Our recommendations are never driven by a commission.
End-to-end mission
From scoping to production, including security and store publishing. One point of contact, one accountability.
Product / tech alignment
We code, but we also question the why. A useless feature perfectly written is still useless.
Long-term engagement available
The best outcomes happen when we stay. Some engagements run for years — that's a signal, not a problem.
What clients say
Signed named testimonials and anonymized cases — 5/5 on published reviews.
« Antoine shares his expertise by helping us set up AI tools that improve our processes. He's extremely efficient and makes simple what looks very complicated, breaking it down clearly and going straight to the point. As auditors ourselves, we know how essential this phase is, and we saw it confirmed at the debrief. I'm looking forward to seeing Antoine's work on the AI tools to optimize our processes and standardize our deliverables, so they're always at the same quality bar. »
« Thanks to MAG we got a complete and performant PoC in a very short time, which let us start prospecting and land our first clients. Conversations are simple and smooth, and MAG is highly responsive — even proactive — in addressing our needs. If you want a solid partner and solid deliverables, don't hesitate. »
How we work
A readable frame from day one: format, duration, pricing.
Solo, expandable
MAG&Cie runs solo by default. On heavier missions we activate a trusted circle of freelancers or specialized partners — never opaque subcontracting.
Short or long missions
From a one-off advisory day to a 12–24 month CTO partnership. We adapt the format to the need, not the other way around.
Day rate or flat fee, transparent
Published day rate or flat fee scoped in writing. Prices are listed on the site — no haggling, no invoice surprises.