Open source — introductions & knowledge graph

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For implementation support related to these topics, see our agency delivery pages—for example RAG implementation, LangChain / LangGraph consulting, open-source AI infrastructure, DuckDB analytics engineering, Kafka data streaming, and Keycloak SSO implementation.

• Digital sovereignty — governance and data control (introduction)

  Data classification, IAM hygiene, audit logs, and AI policy boundaries — linked to our digital sovereignty strategy hub, CS8 best-practices guide, SSO umbrella, and Keycloak delivery.

• DuckDB vs ClickHouse vs BigQuery: choose by operating reality

  A practical comparison for local/on-prem analytics vs distributed real-time analytics vs managed cloud warehouse.

• European digital sovereignty & EuroStack (introduction)

  Gaia-X, EuroStack, IPCEI-CIS, and procurement-facing sovereignty — linked to our digital sovereignty strategy hub, CS8 guide, and open-source AI infrastructure / Kubernetes programmes.

• GitLab vs GitHub vs Bitbucket: full-stack decision guide (including GitLab on-premise)

  A practical architecture-first comparison of GitLab, GitHub, and Bitbucket: hosting model, CI/CD depth, compliance, migration risk, and when GitLab self-managed/on-premise is the right strategic choice.

• Open-source analytics & BI — DuckDB, Superset, Metabase in context

  How teams move from “we installed Superset” to governed analytics: semantic layers, DuckDB for fast analytical paths, Metabase vs Superset trade-offs, and what to read next—including our technical guide and delivery pages.

• Digital sovereignty, SSO, and a sovereign team stack — open-source introduction

  Identity-first collaboration, controlled data paths for Matrix/Mattermost/Nextcloud, policy for bots and AI summaries—linked to our SSO & sovereign collaboration guide, Keycloak and sovereign stack agency pages, plus the digital sovereignty strategy hub and CS8 best-practices guide.

• Geospatial data, PostGIS, and deck.gl — open-source introduction

  PostGIS as source of truth, tile and API strategy, deck.gl rendering budgets—woven with links to our geospatial best-practices guide and PostGIS / deck.gl agency pages.

• Open-source LLM agents & orchestration — strategic introduction

  Stateful workflows, tool permissions, multi-agent cost, and experimental stacks—aligned with our agents orchestration guide plus LangChain/LangGraph, AutoGen/AG2, and OpenClaw delivery pages.

• Open-source RAG & retrieval — introduction for teams and leaders

  Why RAG fails at the data and evaluation layer, how to think about pgvector vs OpenSearch, and where to go next: our RAG best-practices guide, plus agency pages for implementation, LlamaIndex, Postgres, and OpenSearch.

• Self-hosted AI infrastructure — introduction (open source, Kubernetes, IaC)

  Separate inference from experimentation, platform baselines with Kubernetes and GitOps, Terraform/OpenTofu under governance—linked to our self-hosted AI guide and agency pages for OSS AI stack, Kubernetes platform engineering, and infrastructure as code.

• Event streaming & automation with open source — NATS, Kafka, n8n in context

  Topic strategy before throughput bragging; NATS vs Kafka positioning; n8n as integration glue with explicit failure policies—plus links to the streaming best-practices guide and NATS, Kafka, n8n agency pages.

• Keycloak vs Auth0 vs Okta: sovereignty, operations, and migration path

  How to choose between self-hosted open-source IAM and managed cloud IAM based on team capacity, compliance, and long-term control.

• LangGraph vs AutoGen vs CrewAI: controllability over agent theater

  How to choose agent orchestration frameworks by controllability, governance, and measurable outcomes.

• LlamaIndex vs LangChain for RAG: framework choice without dead ends

  How to pick LlamaIndex vs LangChain/LangGraph for RAG while avoiding architecture dead ends.

• NATS vs Kafka: practical decision guide for event platforms

  When to choose NATS/JetStream vs Kafka: replay, ecosystem, consumer complexity, operations, and migration path.

• PostGIS vs BigQuery GIS vs Snowflake geospatial: product data vs BI geo

  A practical geospatial platform comparison for product-grade geodata, BI-only workloads, and team operating models.

• Superset vs Metabase: how to choose (without dashboard theatre)

  A practical decision guide for Apache Superset vs Metabase: governance vs adoption, semantic metrics, permissions, embedding, operations, and when to build custom dashboards instead.

• Technology resilience & vendor lock-in (introduction)

  Exit playbooks, supply-chain hygiene, BCDR, and single-vendor risk — linked to our digital sovereignty strategy hub, CS8 guide, and Terraform, streaming, and self-hosted AI agency programmes.

• Terraform vs OpenTofu: differences first, ideology second

  Neutral decision guide for Terraform vs OpenTofu: licensing, ecosystem, governance, migration cost, and operating model.

• Digital sovereignty, European stack & technology resilience — best practices

  Practical orientation: digital sovereignty, European sovereignty debates (EuroStack, Gaia-X), regulatory context, and technology resilience — with bridges to open-source agency programmes.

• Event streaming & automation — best practices

  Practice guide covering NATS Kafka n8n: architecture choices, checks, and common pitfalls.

• Geospatial PostGIS deck.gl — best practices

  Practice guide covering PostGIS deck.gl MapLibre: architecture choices, checks, and common pitfalls.

• LLM agents & orchestration — best practices

  Practice guide covering LangGraph AutoGen OpenClaw: architecture choices, checks, and common pitfalls.

• Open-source analytics BI — best practices

  Practice guide covering DuckDB Superset Metabase: architecture choices, checks, and common pitfalls.

• RAG & retrieval platform — production best practices

  How-to orientation: evaluation, Postgres/pgvector, metadata, OpenSearch—without vendor hype.

• Self-hosted AI Kubernetes IaC — best practices

  Practice guide covering Llama stack Kubernetes Terraform: architecture choices, checks, and common pitfalls.

• SSO & sovereign collaboration — best practices

  Practice guide covering Keycloak Matrix Mattermost: architecture choices, checks, and common pitfalls.