Who runs Wikipedia?

The Wikimedia Foundation is the organization responsible for operating Wikipedia. It is a nonprofit entity that was established to support and promote the growth of free and open content, particularly focusing on collaborative projects like Wikipedia. This foundation is dedicated to ensuring that everyone has access to educational content and that contributions to Wikipedia are available for free without advertisements.

The Wikimedia Foundation not only oversees the day-to-day operations of Wikipedia but also manages various other projects such as Wikimedia Commons and Wikidata, emphasizing its commitment to free knowledge. It provides the necessary infrastructure, legal support, and community engagement to allow volunteers worldwide to collaboratively create and edit articles, making it possible for Wikipedia to thrive as a dynamic and continually updated resource.

In contrast to other options provided, Google and OpenAI do not run Wikipedia, as they are separate entities with different missions and functions. While Wikipedia is a nonprofit, simply stating "nonprofit organization" does not specify the specific organization that manages it, which is why the Wikimedia Foundation is the accurate choice.