Open source–first Founded 2012

Data science & AI
consulting done right.

We help organisations extract real value from their data using open-source tools — Python, R, and state-of-the-art open LLMs. No vendor lock-in. Full ownership. Your team stays autonomous.

stat4decision.py copy
# our approach in code

from stat4decision import Engagement

engagement = Engagement(
    stack       = ["python", "R", "mistral-ai"],  # open source only
    packaging   = "uv",            # fast, reproducible envs
    versioning  = "gitlab",        # CI/CD, pipelines, MRs
    deployment  = "on-premise",    # your infra, your data
    ownership   = "client",        # code + models are yours
    skills_xfer = True             # team stays autonomous
)

result = engagement.deliver()
# → production-ready · documented · auditable

Tools we actually use in production

No proprietary platforms, no surprise licence costs. Every tool we recommend, we've already debugged at 2am.

🐍Language
Python
pandasscikit-learnPyTorchFastAPILangChainMLflowuvruff
📊Language
R
tidyverseggplot2ShinytidymodelsQuartoforecastrenv
🤖AI / LLM
Open LLMs
Mistral AILlamaHuggingFaceRAGLlamaIndexOllamavLLM
🔧DevOps / MLOps
CI/CD & pipelines
GitLab CI/CDDockerMLflowDVCKubernetesPrefect
📈Dataviz / Apps
Dashboards
StreamlitDashggplot2PlotlyShinyQuarto
🏗️Infrastructure
Posit / R env
RStudio ServerWorkbenchConnectPkg ManagerPositron

Why we only work with open source

It's not ideology — it's the only way to guarantee you stay in control of your data and your models.

01 — No lock-in
Your models, your infra, your call
Python, R and open LLMs (mistral-ai, llama, HuggingFace) mean you can swap models as the landscape evolves — without renegotiating a contract.
02 — Auditability
Explain every prediction
Open models are inspectable. You can satisfy regulators, internal auditors and AI Act obligations — unlike black-box proprietary APIs.
03 — Reproducibility
Environments that actually work
We use uv for Python and renv for R — lockfile-based, blazing fast, zero "works on my machine" issues in your GitLab pipelines.
04 — Skills transfer
Your team can take it from here
Open-source tools are learnable. We document, train and hand over. No proprietary IDE or cloud console that only we know how to operate.

200+ organisations since 2012

Energy, finance, healthcare, retail, research, telecoms — across all sectors, all sizes.

EDFEngie AXADior L'OréalOrange LCLOCDE UbisoftNestlé ThalesScania CNRSCerba Healthcare CofaceInstitut Curie Société GénéraleIfremer

Ready to talk?

Describe your project in a few lines — we respond within 48 hours. No sales deck, no discovery call just to get a price.

Phone +33 1 72 25 40 82 Email info@stat4decision.com Response within 48h