Overview of Berlin’s Open‑Source Policy
The Berlin Open Source Strategy, adopted by the Berlin Senate, aims to reduce reliance on proprietary software and strengthen digital sovereignty across the city‑state’s public administration. It establishes a framework of principles, goals, and concrete measures that guide the migration to open‑source solutions, positioning Berlin as a leading European municipality in open‑source adoption.
Core Principles Guiding the Strategy
The strategy rests on five key principles: “Public Money, Public Code,” ensuring software funded by taxpayers is openly available; digital sovereignty, maintaining full control over IT systems and data; interoperability through open standards; transparency that allows public scrutiny of code; and fostering innovation and collaboration among government, academia, and the tech community.
Reducing Vendor Dependence
A primary objective is to cut Berlin’s dependence on proprietary vendors, especially Microsoft, in core administrative functions such as office productivity, email, and collaboration tools. The strategy mandates systematic evaluation of open‑source alternatives and the development of migration pathways to replace proprietary solutions where feasible.
Open‑Source‑First Procurement
Berlin’s procurement processes are being reformed to give explicit preference to open‑source software that meets functional requirements. New criteria assess vendor independence, code availability, and long‑term maintainability, encouraging suppliers to offer open‑source options and supporting a competitive, transparent market.
Building Internal Competence
Successful implementation requires skilled personnel. The strategy includes training programs and capacity‑building measures for IT staff and decision‑makers, ensuring they understand the benefits, risks, and technical requirements of open‑source adoption within public services.
Collaboration with Other Cities and Networks
Berlin actively collaborates with German and European municipalities, sharing open‑source solutions and best practices. Partnerships with the Open Source Business Alliance and the Foundation for Public Code facilitate joint development projects, amplifying the impact of Berlin’s investments beyond its own borders.
Supporting the Local Open‑Source Ecosystem
By investing in open‑source software, Berlin seeks to stimulate regional economic growth and create jobs in the tech sector. The strategy encourages local developers and companies to contribute to public‑code projects, fostering a vibrant ecosystem that can generate sustainable, home‑grown digital solutions.
Institutional Support and Implementation Actors
The Berlin Senate Chancellery provides political leadership, while ITDZ Berlin serves as the central IT service provider responsible for technical rollout. CityLAB Berlin offers innovation support, and Fraunhofer FOKUS supplies research expertise, together ensuring coordinated execution of the strategy.
European Context and Influence
Berlin’s approach aligns with broader European efforts toward digital sovereignty and open‑source adoption. It mirrors initiatives by the European Commission and other national governments such as France, Italy, and Spain, and contributes to the German “Germany Stack” concept, which envisions a sovereign digital infrastructure based on free software.
Relevance for Sustainable Housing Practitioners
For pan‑European audiences focused on sustainable housing, the strategy demonstrates how open‑source technologies can underpin transparent, cost‑effective, and adaptable digital services that support smart‑city initiatives, including energy‑efficient building management, open data platforms for housing markets, and collaborative planning tools. By prioritizing openness and local expertise, Berlin offers a replicable model for municipalities seeking sustainable, resilient digital foundations for housing and urban development.