Wikibase Software Development

Wikibase Development Services

Wikibase Extension Development Our Wikibase developers create or enhance extensions for your specific needs.
Wikibase Integration Our consultants integrate your Wikibase with other software. Authentication, import, export, web hooks, APIs, we have got you covered.
Wikibase Skinning Make your Wikibase look unique with a custom theme. Our developers create a new MediaWiki skin or configure an existing one such as our very own Chameleon.
Wikibase Import Tooling Import data from other systems into Wikibase. Our developers create high-performance data ingestion tools.
Wikibase Synchronization Sync data between Wikibase instances or between your Wikibase and other systems. Our developers create tools to keep your data in sync.

Your Benefits

High standards

Proven track record

Iterative processes

Play it safe We have a long and proven track record of successful projects starting in 2009. We are well respected within the MediaWiki community.
Work with real experts We created large parts of Wikibase itself and have software development expertise that is unmatched in the Wikibase ecosystem. You don't have to take our word for it, our track record and public code repositories speak for themselves.
Get your desired results quickly We practice iterative development and work with our clients to ensure we create the best solutions for their use cases.
Enjoy quality software We deliver sustainable software with high internal and external quality. We follow clean code practices, create automated tests and develop with continuous integration.
Bug-free, guaranteed Bugs are our responsibility. We are committed to delivering quality work. If any bugs do slip through, we fix them free of charge.

Our team has developed software for

About Professional Wiki

15

years of experience

8

Wikibase extensions

48000+

code changes

260+

clients helped

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.

Learn more about Professional Wiki.

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Contact us with the details of your project.

Customer Testimonials

"Professional Wiki provided Rhizome with competent and timely custom development work. Making use of all the tools that are available to open source developers today, the team built extensions that follow modern software design guidelines, are easy to install, configure, and maintain, and include good documentation and automated testing. Quite unique in the Mediawiki space!"

Dragan Espenschied / Preservation Director, Rhizome

"I had the pleasure to work with Jeroen at Wikimedia Deutschland. Jeroen is one of the most productive and passionate developers that I know. Without Jeroen, Wikidata would not have such a rich range of functions and would be built on a less flexible, lower-quality codebase and architecture. Jeroen has in-depth knowledge and broad experience about clean code and software architectures. I have always appreciated his professional attitude, collegial and reliable manner. He is an absolute win for any team and project!"

Abraham Taherivand / Executive Director, Wikimedia Deutschland

"Jeroen is Technical Director at Professional Wiki. Jeroen was working on Semantic MediaWiki and was one of the original developers on Wikibase at Wikimedia Deutschland. I had the pleasure of working with Jeroen for many years and have rarely found someone as dedicated as him towards the quality of the software he is working on."

Denny Vrandečić / Head of Special Projects, Wikimedia Foundation

"We were lucky to have had multiple opportunities to work with Professional Wiki and were consistently impressed by their expertise and commitment to quality. They deliver outstanding results and provide back to the open source community. Professional Wiki is professional, knowledgeable, and dedicated to delivering top-notch software. Their passion and experience in software architecture and clean code are evident in every project they take on. We highly recommend Professional Wiki for any project in the Mediawiki/Wikibase space."

IP Squared and Digital Werktuig on Automated Values and Wikibase EDTF

Recent Wikibase Extensions

Public Wikibase extensions that we recently created for our clients.

Wikibase Export

Created in 2022 for Universität Mannheim

Wikibase Export adds a user-friendly and customizable export interface to Wikibase.

Source code Documentation Demo wiki Demo video

Automated Values

Created in 2022 for the Luxembourg Ministry of Culture

Wikibase extension that allows defining rules to automatically set labels or aliases based on Statement values.

Source code Documentation Demo wiki Demo video

Wikibase RDF

Created in 2022 for the Wikibase Stakeholder Group

Wikibase extension that allows defining RDF mappings for Wikibase Entities.

Source code Documentation Demo wiki

Wikibase EDTF

Created in 2021 for the Luxembourg Ministry of Culture

Wikibase Export adds a user-friendly and customizable export interface to Wikibase.

Source code Documentation Demo wiki Demo video Library source

Wikibase Local Media

Created in 2020 for the Rhizome

Adds support for local media files to Wikibase via a new data type.

Source code Documentation Demo video

Our MediaWiki Projects

We created over 40 MediaWiki extensions and contributed to over 100. Here are some highlights:

Semantic MediaWiki

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

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.

Maps

Created in 2009 during Google Summer of Code

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

Chameleon

Created in 2014

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

ProWiki

Launched in 2022

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 History

2009

Our Humble Beginnings

Our founders attend their first SMWCon. Jeroen creates the Maps extension.
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.
January 2019

Founding of Professional Wiki

We start collaborating formally to deliver next-level MediaWiki services.
May 2022

ProWiki Launches

We launch ProWiki, the most modern and user-friendly MediaWiki hosting platform.