Wikipedia

Wikipedia is a free Internet-based encyclopedia operating under an open-source management style, launched on January 15, 2001, by Jimmy Wales and Larry Sanger[1][4]. As of December 2025, there are over 66 million articles across all languages on Wikipedia, with around 7 million articles in English[19]. In March 2024, close to 4.4 billion unique global visitors had visited Wikipedia.org, making it a free online encyclopedia with articles generated by volunteers worldwide and hosted by the Wikimedia Foundation[16].

Origins and Founding

Wikipedia emerged from Nupedia, a free online encyclopedia founded by Jimmy Wales in March 2000 that sought contributions from scholars and experts through an intensive peer-review process. Frustrated by the slow progress of this project, Wales and Nupedia's editor in chief, Larry Sanger, in 2001 turned to a new technology, a type of software called wiki, to create Wikipedia, a companion encyclopedia site that anyone could contribute to and edit[1].

Nupedia's sluggish progress disappointed Wales. In its first year, only 21 articles were approved. He realized academic peer review made contributing too intimidating. By January 2001, Wales soft-launched a side-project built around simplicity over perfection: Wikipedia[5]. On January 15, 2001, Wikipedia was officially launched as a side project to Nupedia. It was conceived as a more open and quickly evolving platform where anyone with internet access could write and edit articles[6].

Governance and Editorial Policies

All of the information on Wikipedia is governed by a set of editorial policies and guidelines developed and enforced by volunteer editors who add content to the site. These policies require information to be well-sourced and delivered from a neutral point of view. In addition, original research is not permitted on Wikipedia[29].

Wikipedia's content is governed by three core policies: neutrality, verifiability, and the prohibition of original research[30]. Among these, the policy of Neutral Point of View (NPOV) stands as a cornerstone—it is, in fact, one of Wikipedia's five foundational pillars[21].

These volunteers determine which edits to keep or reject, according to principles of decentralized decision-making and self-governance. A two-tier system of elected moderators, administrators and arbitrators, monitor the site, sanction users, and enforce policy decisions. There are millions of regular users on Wikipedia, but only 840 administrators and 15 arbitrators[26].

On Wikipedia, moderation takes various forms to ensure that content and practices align with established policies. One particularly important moderation form is the crowdsourced use of templates, which help inform editors and readers about articles requiring maintenance, such as those needing additional references, formatting, or other improvements[25].

Scale and Statistics

As of December 2023, the English subdomain of Wikipedia had around 6.91 million articles published, being the largest subdomain of the website by number of entries and registered active users[11][12]. Wikipedia's summary statistics page reports more than 600,000 active users, which it defines as people who have an account and have made at least one edit in the last 30 days. Just under half of these active users (45%) contribute to English Wikipedia. Wikipedia also estimates that more than 15 million registered English users have ever made an edit[19].

In 2024, the site was edited an average of 5.7 times every second. Nearly 40% of those edits come from Wikipedia-approved bots, which operate alongside human editors. These bots are designed to perform tasks like updating statistics, fixing links, and countering vandalism such as intentionally inaccurate or humorous edits[19].

Organizational Structure

In 2003, Wales set up the nonprofit Wikimedia Foundation (WMF) to establish policy for Wikipedia and related projects[2][5]. The Wikimedia Foundation serves as a steward of Wikipedia, hosting technical infrastructure and supporting community self-governance. The WMF empowers local communities to develop and apply content policies such as NPOV, but does not exercise day-to-day editorial control, taking direct action on Wikipedia only in rare cases due to legal or safety issues. Rather than acting as a conventional for-profit technology company, the WMF's mission is to enable global access to free, community-developed educational content[21].

Remarkably, the sum amounts to an impressive $180 million.[6] Have you ever wondered how much the Wikimedia Foundation brings in annually through donations? Well, the figure is a staggering $180 million. Jimmy Wales, the co-founder of Wikipedia, proudly highlights the site's low operational costs. To emphasize, it only costs $5,000 monthly to support 1.4 billion monthly page views without requiring a full-time employee. Even with Wikipedia receiving seven times more visits, the monthly cost remains at just $35,000[6].

Content Quality and Challenges

Prior research shows that Wikipedia does not have capacity to apply its principle of "neutral point of view" (NPOV) at scale. Although Wikipedia's policies and processes should ensure that entries are impartial and high-quality, in practice, neutrality is difficult to maintain and malicious actors can game these systems[26].

We have seen time and time again that volunteers have a strong track record of successfully managing neutrality on contentious subjects. Those that sustain the Wikimedia projects remain humble and clear-eyed: they must constantly adapt and improve their systems as digital and media platforms around the world struggle with bias and disinformation. Stronger community-led content moderation policies that are enforced primarily by local communities protect Wikipedia and Wikipedians alike[23].

Wikipedia has not developed large-scale or advanced technical solutions, such as automated detection, to enforce its policies against bias or harassment. Wikipedia's decentralized model, dependence on human review, and rudimentary tools for analysis limit its ability to address widespread abuse or manipulation. Issues of scale remain one of the primary challenges for Wikipedia in mitigating bias[26].

Global Impact and Usage

The world's reliance on Wikipedia continues to grow – from AI chatbots to search engines to voice assistants to content reusers across the internet. Strengthening Wikipedia's neutrality will make it even more trusted to deliver the content that billions of people rely on around the world[22].

The centrality of Wikipedia content to Google search and knowledge panels, and more recently, to LLMs, means that inaccurate or misleading content is included or featured in search results and other applications, such as AI chatbots. Google has been incorporating Wikipedia articles into its "knowledge panels" since at least 2012 and favors Wikipedia content in its search results. Wikipedia pages that might not have had much public visibility, and which are not as well-vetted or secured as well as high-profile ones, can be equally favored by auto-indexing, despite their less reliable content[26].

In October 2025, the Wikimedia Foundation reported that human pageviews were down by roughly 8% compared with the same months in 2024, a trend it attributes to the rise in generative AI and AI search summaries[19].

Related Projects

In 2004, Wales co-founded Fandom (then called Wikia), which enables groups of people to share information and opinions that fall outside the scope of an encyclopedia. Wikia's community-created wikis range from video games and movies to finance and environmental issues[3].