Top 5 AI consultancies in France — who to call at which stage

A founder hunting for an AI provider in 2026 types a query into Google and lands on fifteen "Top 10" articles. Every list cites the same names. None says who does what for whom. Result — the wrong provider, six months lost, and a product that never ships.

This post does not rank by revenue. It picks five AI players in France and pins down the exact moment of your cycle when each one becomes useful. We start with ourselves, because at the founder stage, we're the one you need, not Artefact.

The classic trap

Picking an AI provider is not picking a skill. All these teams know how to do AI. What changes is their delivery format — and that is exactly what nobody checks before signing.

A product studio delivers a working app. A data scale-up delivers a model and a dashboard. A large strategy firm delivers a roadmap and a steering committee. Buy the wrong format and you pay a lot for something you cannot use.

The five players below cover the main formats on the French market. Here is which one to call, and when.

The five players

21Day Studio — the "product studio" format

A France-based product studio built for founders and SMB leaders. One single contact, 21 days from the first call to production, EUR 19,000 fixed price, source code handed over at delivery. No steering committee, no consultants in suits, no slide deck — a product running on day 22, in production.

When to call us: you have a product idea, a defined budget, and you need a working MVP within four weeks. Not a prototype, not a demo, an actual product your users can touch. If you want to audit your listed group's AI strategy or draft a three-year transformation plan, see further down this list — that is not what we do.

Theodo Data & AI — the "build" format

Formerly Sicara, founded in 2016, now the data arm of the Theodo Group (around 700 people). Annual revenue growth above 30%.

When to call them: the team comes from the build side — they ship code in production, not slides. Pricing sits below Artefact and BCG. Worth considering to embed a model into an existing product, or for an ambitious first AI version when you have several months of runway. Larger than us, slower, but well-armed for scale-ups beyond EUR 50M in revenue.

Ekimetrics — the "marketing ROI" format

Founded in 2007 in Paris. Over 2,000 AI models deployed for around 200 clients including L'Oréal, AXA, BNP Paribas, Mastercard. Cited by Gartner in the global top 5 on marketing ROI measurement.

When to call them: you have a marketing-driven AI topic — marketing mix modelling, demand forecasting, customer personalisation. Less useful if you want a software product your teams can use day to day.

BCG X — the "executive committee" format

The AI arm of the Boston Consulting Group, founded in Paris in 2015. More than 3,000 experts globally, announced partnerships with OpenAI and Anthropic.

When to call them: the AI decision is owned by your executive committee and the expected output is a costed strategy — not code. Day rate at the top of the market, on the BCG grid. Reserved for large groups and mature mid-market companies.

Artefact — the "transformation" format

More than 1,500 people across 27 countries. Clients sit in the CAC40 and global retail — L'Oréal, Samsung, Carrefour, Sanofi.

When to call them: you are a large enterprise, AI has to touch several subsidiaries, and you need a governance framework with a multi-country deployment plan. Not when you want to ship a product in two months.

Who to call at which stage

Your stage	What you want	Who to call
Founder, SMB leader	Ship a product, validate a market in 21 days	21Day Studio
Growing company, up to EUR 50M	Add AI inside an existing product	Theodo Data & AI, or Ekimetrics if it is marketing
Mid-market	Industrialise across several use cases	Ekimetrics, Artefact
Large enterprise, CAC40	Governance, multi-country, executive committee	Artefact, BCG X

Going to the wrong one is paying for a Mercedes to drive across the village. The five above are not bad — they are bad for you, at your stage.

Takeaways

Picking an AI provider means picking a delivery format before picking a team. The larger the firm, the stronger on governance and multi-country. The smaller the firm, the stronger on speed and shipped code.

If you're a founder or SMB leader who wants an AI product in hand within the month, that's us. If you're a data director at a listed group preparing a three-year plan, it's Artefact or BCG. In between, you have Theodo for the build and Ekimetrics for the marketing. Scoped, priced, on time, in production.