Google believes that open source is good for everyone. By being open and freely available, it enables and encourages collaboration and the development of technology.
Google supports the event financially.
Sponsors
FOSDEM would not be possible without the generous help of our sponsors. Thank you very much!
If you are interested in sponsoring FOSDEM, send us an email at sponsors@fosdem.org or see our contact page for more information.
While FOSDEM is primarily funded by sponsors and the sale of t-shirts, we also gratefully accept voluntary donations. See our donations page for more information.
Cornerstone Sponsor
Main Sponsors
(in alphabetical order)
Colt
Colt Technology Services (Colt) is a global digital infrastructure company which creates extraordinary connections to help businesses succeed. Powered by amazing people and like-minded partners, Colt is driven by its purpose: to put the power of the digital universe in the hands of its customers, wherever, whenever and however they choose.
Since 1992, Colt has set itself apart through its deep commitment to its customers, growing from its heritage in the City of London to a global business spanning 40+ countries, with over 6,000 employees and more than 80 offices around the world. Colt’s customers benefit from expansive digital infrastructure connecting 32,000 buildings across 230 cities, more than 50 Metropolitan Area Networks and 275+ Points of Presence across Europe, Asia, the Middle East, Africa and North America’s largest business hubs.
Privately owned, Colt is one of the most financially sound companies in the sector. Obsessed with delivering industry-leading customer experience, Colt is guided by its dedication to customer innovation, by its values and its responsibility to its customers, partners, people and the planet.
Colt sponsors an internet uplink at FOSDEM.
Dstny
We at Dstny are a European leader and innovator in secure cloud communications, based on our powerful UCaaS offer and technology. Over 2 million business users are empowered to communicate, collaborate, and provide excellent customer service with our tools at hand. We enable service providers, partners, and end-users as well as 3rd party services to thrive in our ecosystem. With headquarters in Brussels, we have more than 700 employees in 7 European countries and an annual turnover of close to €190 million in 2021.
Dstny sponsors an internet uplink at FOSDEM.
DuckLabs
DuckLabs is the Amsterdam-based company behind DuckDB, an open-source analytical database designed to make data analysis fast, portable and simple. DuckLabs employs the key contributors to the DuckDB, DuckLake and Quack projects.
DuckDB is designed to be extensible: the Community Extensions repository lets anyone publish extensions that add new file formats, functions and integrations.
Since September 2026, DuckLabs has operated as a subsidiary of Amazon Web Services. The intellectual property and trademarks remain with the non-profit DuckDB Foundation, which keeps the project open source under the MIT license.
DuckLabs supports the event financially.
Element
Element is an open source messaging and collaboration platform.
We give people and organisations back their digital sovereignty by decentralising conversations, letting you host yourself or through a hosting provider such as Element Matrix Services.
Element is built on Matrix - an open network for secure, decentralised communication - for easy connectivity with any of the 44M addressable users on the public Matrix network. Additional privacy is provided by end-to-end encryption, protecting instant messaging, 1:1 voice and video calls, and file sharing.
Element was founded by the team behind Matrix as a way to bring it to the mainstream.
Element provides the chat infrastructure.
LMAX Group
As a leading player in global FX and digital assets, LMAX Group is shaping the future of capital markets by operating high-performance, ultra-low latency global exchange infrastructure built on open source technology. Our commitment to open source is demonstrated by our active contribution to the ecosystem, including the in-house projects Disruptor and Simple-DSL, and by our practice of feeding back code changes and providing commercial support to the open source projects we rely on. Driven by a strong culture of technical excellence, we are a great place to work for engineers passionate about building complex, high-throughput systems for our global client base.
LMAX Group supports the event financially.
Percona
We believe in open source. Full stop. We started Percona because we’re sick and tired of rugpulls and watching great companies get held hostage by proprietary vendors.
Since 2006, we’ve been building enterprise-grade open source software and fielding some of the toughest database problems for organizations that refuse to hand control of their future to a vendor’s business model.
We don’t do lock-in. We don’t do bloated licensing fees. Our focus is expertise, transparency, and software that’s actually yours.
Percona supports the event financially.
Rocky Linux
Governed by the Rocky Enterprise Software Foundation (RESF), Rocky Linux is a free, open source community enterprise operating system designed to be binary compatible with Red Hat Enterprise Linux(R). With solid stability, fast updates, and a 10-year support lifecycle, Rocky Linux is production-ready. From research and academia to enterprise, industry, and government, thousands of organizations worldwide rely on Rocky Linux as a basis for their internal and commercial needs.
Our vision is to create and nurture a community of individuals and organizations that are committed to ensuring the longevity, stewardship, and innovation of enterprise grade open-source software that is always freely available.
We invite all individuals and organizations who believe in this vision to stand with us and be a part of the Foundation and Projects at https://resf.org.
The Rocky Enterprise Software Foundation supports the event financially.
Université Libre de Bruxelles
The Université Libre de Bruxelles (or ULB) is a French-speaking university in Brussels, Belgium. It has about 20,000 students.
The ULB substantially supports the event by providing us with the location at cost, as well as allowing the use of infrastructure on-site.