Collaborate with us on your next Wikibase software project.
Enjoy a stress-free experience and a reliable product.
Proven track record
years of experience
Professional Wiki GmbH is a Berlin-based company with an international team that serves international clients.
We are MediaWiki veterans with expertise that includes MediaWiki hosting and MediaWiki software development.
Our CEO is one of the original developers of Wikibase and made more code changes to Wikibase than anyone else. Professional Wiki has created over 40 MediaWiki extensions and helped over a dozen large organizations with their Wikibase projects. We provide Wikibase hosting.
We are a customer-focused agile company. We value professionalism, quality and sustainability. Learn more Join our team.
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Public Wikibase extensions that we recently created for our clients.
Wikibase Export adds a user-friendly and customizable export interface to Wikibase.Source code Documentation Demo wiki Demo video
Wikibase extension that allows defining rules to automatically set labels or aliases based on Statement values.Source code Documentation Demo wiki Demo video
Wikibase extension that allows defining RDF mappings for Wikibase Entities.Source code Documentation Demo wiki
Wikibase Export adds a user-friendly and customizable export interface to Wikibase.Source code Documentation Demo wiki Demo video Library source
Adds support for local media files to Wikibase via a new data type.Source code Documentation Demo video
We created over 40 MediaWiki extensions and contributed to over 100. Here are some highlights:
Semantic MediaWiki (SMW) is a free, open-source extension to MediaWiki that lets you store and query data within the wiki's pages.
Work with the best Semantic MediaWiki developers in the world. We created large parts of SMW, are its maintainers, and also provide Semantic MediaWiki hosting.
Wikibase is a free, open-source software platform for creating knowledge bases. It powers Wikidata and is primarily developed by Wikimedia Deutschland.
Work with the best Wikibase developers. We created large parts of Wikibase itself, developed various extensions for our clients, and provide Wikibase hosting.
Google Maps and Leaflet integration for MediaWiki. Embed dynamic and highly customizable maps into your wiki. Features a visual map editor and integration with Semantic MediaWiki.Source code Documentation Demo wiki Demo video
We maintain Chameleon, the most popular responsive MediaWiki skin. Chameleon is highly customizable, often used by companies to brand their corporate wikis in line with their corporate identity.Source code Documentation Examples wikis
We created the most modern MediaWiki hosting product on the market. Create your wiki by filling out a simple form and manage it via a user-friendly wiki administration interface.
We developed ProWiki with the same rigor that we apply to projects for our clients. While it is not open source, our creation and operation of the platform demonstrates our expertise.Website Blog
Our founders attend their first SMWCon. Jeroen creates the Maps extension.
We become maintainers of Semantic MediaWiki. Jeroen creates Wikibase and Wikidata, and is promoted to Software Architect at Wikimedia Deutschland. Karsten launches WikiHoster.
We start collaborating formally to deliver next-level MediaWiki services.
We launch ProWiki, the most modern and user-friendly MediaWiki hosting platform.
Learn more about Professional Wiki.
We developed a new MediaWiki extension for the Luxembourg Ministry of Culture. Automate value creation in your Wikibase.
Importing a large number of Items into Wikibase can be a challenge. We provide a high-level overview of importing approaches and their performance.
Jeroen shares his advice for junior developers. This is a great read for anyone who is just starting out with programming.