We keep Wikimedia projects fast, reliable, and available to all.
From hosting Wikipedia to creating edit-checking artificial intelligence (AI), we design and build the open-source technology that powers Wikimedia projects. Community volunteers and Foundation technologists collaborate on MediaWiki, the platform that makes sharing free knowledge possible.
Hosting the world’s knowledge
Wikipedia is the fifth most-visited website in the world, with more than 6,000 visits every second. Our infrastructure keeps it online. Over the last year, we delivered an uptime of 99.97% (according to independent monitoring) across all project sites.
Saving data costs for readers
More than half of Wikimedia’s visitors connect from mobile devices. But high mobile data costs across Africa, Latin America, and Asia can make accessing Wikipedia expensive. That is why we redesigned our apps and sites to be up to 51% less data intensive.
Assisting human collaboration with machine learning
Anyone can edit Wikipedia, and it can be challenging to maintain quality control. That is why we made ORES, an artificial intelligence service that automatically identifies potentially problematic content as soon as it appears, advising editors if changes are needed.
Helping NASA
NASA’s internal wiki for collaboration and documentation is built on MediaWiki, just like Wikipedia. We create MediaWiki—open-source wiki software that is free and available for anyone.
Mentoring new developers
To help build a more diverse and inclusive technical community, the Wikimedia Foundation funds, supports, and mentors new developers and underrepresented groups in tech.
Growing a volunteer developer community
Over half of the commits made to our codebase are pushed by volunteers. We actively support a thriving volunteer technology community, with grants, events, and an open collaboration tool.
Help us unlock the world’s knowledge.
As a nonprofit, Wikipedia and our related free knowledge projects are powered primarily through donations.
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News — Noticias
The Wikimedia Foundation stands with its communities around the world in defending free knowledge in the face of threats from the Russian government
Цей пост також доступний українською мовою.Этот пост также доступен на русском языке. On 1 March 2022 the Wikimedia Foundation received a Russian government demand to remove content related to the unprovoked invasion of Ukraine posted by volunteer contributors to Russian Wikipedia. The Wikimedia Foundation and the movement we are part of have never backed down….
Creating a Culture of Online Safety: Wikipedia’s Security team rises to new cyber challenges
The Wikimedia Foundation’s Security team is an often invisible force that works tirelessly to protect the information and software of Wikipedia and our other projects. The internet has changed a lot since Wikipedia was created in 2001, and that change has brought with it myriad new security challenges. From our vast army of diverse volunteer editors….
Elsewhere in Wikimedia — En Otro Lugar de Wikimedia
Dive deeper into Wikimedia projects
Originally created for use on Wikipedia, MediaWiki is free and open-source wiki software written in PHP.
The web service and API that provides machine learning as a service to flag bad edits and vandalism on Wikimedia projects.
Wikipedia at your fingertips on Android. Set your app to night reading mode or save articles to read offline.
Wikipedia at your fingertips on iOS. Set your app to night reading mode or save articles to read offline.
Our API provides straightforward access to Wikimedia content and data, in machine-readable formats.
Wikistats is a public dashboard featuring data about the reach and impact of Wikimedia projects.
For organizations that reuse Wikimedia content: Wikimedia Enterprise is a commercial product that meets a range of high volume content reuse needs, providing streamlined, on-demand access to Wikimedia APIs with standard Service Level Agreements.
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