Why we’re here
Creating a modern wiki experience on top of the software that powers Wikipedia.
MediaWiki is a powerful open-source software platform that powers hundreds of thousands of wikis. Professional Wiki provides professional MediaWiki consulting services and MediaWiki hosting. We make MediaWiki more useful for businesses and organizations.
With ProWiki we provided the first truly modern MediaWiki experience. Gone are the days of needing to assign your IT staff to maintain a new software stack. You can now create and configure your wiki with a few clicks.
Our Expertise
The Company
15
years of experience
260+
clients helped
240+
wikis hosted
48000+
code changes
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.
Professional Wiki has made significant contributions to MediaWiki, Semantic MediaWiki and Wikibase. Our MediaWiki developers created over 40 MediaWiki extensions and our Wikibase developers created over 8 Wikibase extensions. We also write a lot of MediaWiki documentation.
We are a customer-focused agile company. We value professionalism, quality and sustainability. Join our team.
Our History
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2009
Our Humble Beginnings
Our founders attend their first SMWCon. Jeroen creates the Maps extension.
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2010-2018
We Level Up
We become maintainers of Semantic MediaWiki. Jeroen creates Wikibase and Wikidata, and is promoted to Software Architect at Wikimedia Deutschland. Karsten launches WikiHoster.net.
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January 2019
Founding of Professional Wiki
We start collaborating formally to deliver next-level MediaWiki services.
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May 2022
ProWiki Launches
We launch ProWiki, the most modern and user-friendly MediaWiki hosting platform.
Meet the Team
Jeroen De Dauw
CEO & CTO
Jeroen is our CTO. He created Wikibase, maintains Semantic MediaWiki and is credited as one of MediaWiki's creators.
Jeroen is a software craftsman with deep expertise in software architecture, testing, and quality. He occasionally posts on his developer blog.
Jeroen started working with MediaWiki in 2009 and has since assisted companies across the globe, including Google and the Wikimedia Foundation.
In his spare time, Jeroen enjoys beach volleyball, board games, and reading.
Karsten Hoffmeyer
CFO & MediaWiki Expert
Besides being our CFO, Karsten is a MediaWiki veteran with deep and broad MediaWiki usage expertise.
Karsten has set up 100s of wikis and is one of the most active editors of documentation on MediaWiki.org and Semantic-MediaWiki.org.
Karsten got involved with MediaWiki in 2009. In 2011, he launched WikiHoster.net. Karsten has spoken at several Semantic-MediaWiki conferences (SMWCon).
In his free time, Karsten enjoys caring for plants, reading books, taking walks, and using wikis.
Tobias Oetterer
MediaWiki expert
Tobias is a well rounded MediaWiki expert. He is an experienced wiki administrator, has set up multiple wikis and has created his own MediaWiki extensions. He has been involved in the Semantic MediaWiki community for many years.
Iván Hernández-Cazorla
MediaWiki expert
Iván is specialized in cultural heritage and digital humanities. He has been providing both MediaWiki and Semantic MediaWiki services for multiple years. He is active in the community and is familiar with Wikidata.
Stephan Gambke
MediaWiki-Entwickler
Stephan is a veteran MediaWiki developer. He created several MediaWiki extensions and is the author of the popular Chameleon skin. Stephan has been involved with the MediaWiki and Semantic MediaWiki communities for over a decade.
Morne Alberts
MediaWiki-Entwickler
Morne has been doing web development for over a decade and is currently maintaining the popular Chameleon skin. He has a passion for automation, testing and well designed and sustainable solutions.
Wouter Rademaker
MediaWiki expert
Wouter has been working with MediaWiki for over 15 years. His experience includes constructing and maintaining wiki farms, among which is an integrated multi-language farm, system administration and Semantic MediaWiki.
MediaWiki expert
This could be you!
Are you an open-minded and driven developer that likes working in a small Agile team of skilled experts amd developers? Join Professional Wiki!
View our MediaWiki job opportunities.
Our Development Portfolio
View our open-source MediaWiki projects.
Customer Testimonials
Professional Wiki is able to satisfy all your needs as single provider serving high quality holistic customer-focused solutions. Just get in touch with us!
Our MediaWiki Services
Get superior results from the best MediaWiki developers with a proven track record of creating MediaWiki extensions & integrations.
Make your wiki look great! Use a time-tested responsive MediaWiki theme, or have us create a custom MediaWiki skin for you.
Let us take care of your wiki. We are MediaWiki hosting experts and provide cloud hosting, dedicated hosting, and on-premise hosting.
Bring your wiki to the next level by leveraging our MediaWiki expertise. From strategic planning to wikitext, we have you covered.
Migrate your wiki with confidence. We move your MediaWiki to a new home, or we help you migrate from another system to MediaWiki.
Keep your MediaWiki up-to-date and secure. We offer MediaWiki maintenance services to keep your wiki running smoothly.
We Also Have Expertise In
Semantic MediaWiki
Unlock your wiki's full potential with Semantic MediaWiki (SMW). It transforms your wiki into a versatile and collaborative knowledge base, as done on thousands of wikis. We provide hosting, consulting, training, and development.
Wikibase and Wikidata
Harness the Power of Wikibase and Knowledge Graphs. From hosting to consulting, and from data modelling to software development, we have your Wikibase needs covered.
Artificial Intelligence (AI)
Take your wiki to the next level with AI integration. Chatbots, writing assistants, and automatic summaries are some of the new tools at your disposal to improve productivity and manage knowledge like never before.