Technology Stack

Principle: Maximum sovereignty, zero US dependency, open source first

✅ Sovereign Stack: 9.5/10 sovereignty score. All data in EU jurisdiction, no US Cloud Act exposure, community-governed open source.

Infrastructure Layer

Component	Technology	Origin	Sovereignty
Cloud Provider	OVHcloud + Hetzner	🇫🇷 France + 🇩🇪 Germany	✅✅✅
IaC	OpenTofu	🌍 Linux Foundation	✅✅✅
Containers	Podman + Kubernetes	🌍 Community	✅✅✅
CI/CD	Woodpecker CI	🌍 Community	✅✅✅
Code Repo	Forgejo (self-hosted)	🌍 Community	✅✅✅

Data Layer

Component	Technology	Origin	Sovereignty
Graph Database	Memgraph	🇸🇮 Slovenia	✅✅✅
Event Stream	Apache Kafka (self-hosted)	🌍 Apache Foundation	✅✅✅
Object Storage	Ceph (self-hosted)	🌍 Community	✅✅✅
Relational DB	PostgreSQL	🌍 Community	✅✅✅

AI/ML Layer

Component	Technology	Origin	Sovereignty
LLM	Mistral 7B (self-hosted)	🇫🇷 France	✅✅✅
Hosting	Ollama + vLLM	🌍 Community	✅✅✅
Orchestration	Haystack	🇩🇪 Germany	✅✅✅
Vector DB	Qdrant	🇬🇧 UK / 🇪🇪 Estonia	✅✅✅

Frontend Layer

Component	Technology	Origin	Sovereignty
Framework	Vue.js + Nuxt	🇫🇷 France	✅✅✅
Maps	MapLibre + OpenStreetMap	🌍 Community	✅✅✅
Diagrams	Mermaid + PlantUML	🌍 / 🇫🇷 France	✅✅✅

Security Layer

Component	Technology	Origin	Sovereignty
Authentication	Zitadel	🇨🇭 Switzerland	✅✅✅
Secrets	HashiCorp Vault (self-hosted)	🌍 Community	✅✅✅
Monitoring	Prometheus + Grafana	🌍 / 🇨🇭 Switzerland	✅✅✅
SSL/TLS	ZeroSSL	🇦🇹 Austria	✅✅✅

Hardware Specifications

Component	Specification	Quantity	Cost (€)
Compute Servers	Dell PowerEdge / Supermicro 2U	4	32,000
CPU	AMD EPYC 7543 (32 core)	4	14,000
RAM	512 GB DDR4 ECC	4	8,000
GPU (AI)	NVIDIA A100 40GB	2	30,000
Storage	4TB NVMe + 16TB HDD	24	8,800
TOTAL (2 DCs)			€503,000

View Full Tech Specs on GitHub