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Wikimedia Foundation

Nonprofit operator of Wikipedia

Overview

The Wikimedia Foundation runs Wikipedia and the family of Wikimedia free-knowledge projects as a nonprofit organization. It supports reading, contributing, and sharing content through software experiences and community programs, funded by donations from individuals and institutional grants. Its products work by letting volunteers write and edit articles, and readers access them for free through web and mobile experiences that prioritize openness and collaboration. Unlike for-profit tech platforms, Wikimedia focuses on free knowledge for everyone and backs the volunteer communities who create it, along with advocacy for policies that enable free knowledge to thrive. Its goal is a world in which every person can freely share in the sum of all knowledge.

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About Wikimedia Foundation

Simplify's Rating
Why Wikimedia Foundation is rated
B
Rated A on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Social ImpactEducation

Company Size

1,001-5,000

Company Stage

Grant

Total Funding

$150M

Headquarters

San Francisco, CA

Founded

2003

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What believers are saying

  • Wikimedia filed October 30, 2026 to shape OpenAI copyright rules around attribution.
  • The 2026–2027 plan pushes app growth and direct traffic beyond Google dependence.
  • Paste Check and bot defenses address AI abuse, protecting infrastructure and contributor trust.

What critics are saying

  • OpenAI-linked agents hit Wikimedia in October 2026, probing Etherpad and flooding APIs.
  • AI summaries and bot scraping cut referrals; Wikimedia said 2025 bot traffic dominated resources.
  • May 2026 Community Tech layoffs and union fights signal internal strain and execution risk.

What makes Wikimedia Foundation unique

  • Wikipedia’s volunteer governance and neutral, CC BY-SA knowledge model still beats AI summaries.
  • Bernadette Meehan’s January 2026 leadership centered direct traffic, safety, and global advocacy.
  • Its scale spans Wikipedia, Wikidata, Commons, and 650 staff across 44 countries.

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Funding

Total Funding

$150M

Above

Industry Average

Funded Over

14 Rounds

Grant funding comparison data is currently unavailable. We're working to provide this information soon!
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Benefits

  • Remote Work Options

Growth & Insights and Company News

6 month growth

3%

1 year growth

3%

2 year growth

3%
Wikimedia Foundation
Oct 29th, 2026
"Don't Blink": Protecting the Wikimedia model, its people, and its values in September 2026.

"Don't Blink": Protecting the Wikimedia model, its people, and its values in September 2026. 29 October 2026 by Allison Davenport, Lead Public Policy Analyst, Wikimedia Foundation Welcome to "Don't Blink"! Every month Wikimedia Foundation, Inc. share public policy developments from around the world that shape people's ability to participate in the free knowledge movement. In case you blinked last month, here are the most important advocacy topics that have kept the Wikimedia Foundation busy. The Global Advocacy team works to advocate laws and government policies that protect the volunteer community-led Wikimedia model, Wikimedia's people, and the Wikimedia movement's core values. To learn more about Wikimedia Foundation, Inc. and the work Wikimedia Foundation, Inc. do with the rest of the Foundation: follow Wikimedia Foundation, Inc. on LinkedIn, X (formerly Twitter), and Bluesky; sign up for its quarterly newsletter or Wikimedia public policy mailing list; and visit its Meta-Wiki webpage. Representing human knowledge at the United Nations General Assembly (UNGA) High-Level Week 2026 [Read its Foundation statement about participating at UNGA]. Every year in September, the United Nations General Assembly is convened in New York City to debate and make decisions about questions of global importance. During the 81st session of UNGA in September 2026, the topic of artificial intelligence (AI) and its impact on the world were at the forefront of conversations. While many of these discussions focused on recent, eye-catching headlines about AI safety, the Wikimedia Foundation brought to the table its own experience about content reuse and the challenges that AI is posing for open knowledge infrastructure. Bernadette Meehan (CEO of the Foundation) joined several talks throughout the week to emphasize three key messages about protecting free knowledge online: * Human knowledge is essential: Knowledge created and curated by humans serves as the cumulative memory of all humanity, and the standards around verifiability, neutrality, and transparency that organize the Wikimedia projects serve to underpin the success and accuracy of AI models. * Wikipedia is free, but infrastructure is not: While the content on Wikipedia is free and open for anyone to use and build upon with the proper attribution, the cost of rising web scraping and automated bot traffic on the infrastructure hosting the projects must be addressed. It is crucial in order to secure the long-term sustainability of the online information ecosystem. * AI safety is important, but the AI governance and regulation conversation need to be broader: Lawmakers reasonably want to address the potential safety risks of AI systems, but this alone is not enough to protect the world from the rest of AI's negative effects. They also need to address how to protect human knowledge sources from AI, and include stakeholders from civil society, multilateral institutions, academia, and news media in discussion rather than only a handful of high-profile corporations. The Foundation will continue showing up at these important conversations to make sure that the effects of AI on open knowledge are properly understood and taken into account by those shaping the future of AI governance. Explaining how online age verification affects the Wikimedia projects at the Future of Speech Online Conference [Watch its panel participation on age verification and its impact on anonymity]. The 2026 Future of Speech Online Conference, hosted by the Center for Democracy and Technology (CDT), examined the state of anonymity online and how current technological, political, and regulatory changes may threaten protections for anonymity in the future. A series of panels with experts from civil society, academia, and technology companies explored the importance of anonymous participation to freedom of expression and privacy, how AI tools and the reaction to them risk eroding anonymity online, and ways to maximize protections for anonymity while preventing harm online. Ricky Gaines (Human Rights Policy and Advocacy Lead) joined a panel about online age verification to share the Foundation's concerns about the trend of age gating requirements being included in laws related to child safety. Ricky discussed how collecting additional information to meet these requirements could negatively affect participation on the Wikimedia projects. The Wikimedia model has historically preserved anonymous and pseudonymous - as in under a user name - participation on the projects, since this plays a vital role in allowing people around the world to contribute to and read about topics on Wikipedia that may be sensitive and/or inspire political or interpersonal harassment and retaliation. In addition to the implications that age verification has for free expression, Ricky emphasized that these changes would also present an unreasonable compliance burden for the Foundation - since it currently collects minimal personally identifiable information (PII) about volunteer contributors and readers, and would be required by the laws to collect information about both child and adult users. All of the panels from the conference can be viewed on CDT's event webpage. Contributing with Wikimedia Australia (WMAU) to Australian privacy reform consultation [Read its joint response to the consultation and Wikimedia Australia's blog post about it]. Wikimedia Australia and the Foundation provided a joint response to a consultation regarding the Australian government's proposed Privacy Amendment (Personal Data Protection) Bill 2026, a comprehensive update to Australia's privacy laws relating to digital technology. Wikimedia Foundation, Inc. support a privacy framework that gives people meaningful control over their personal data, promotes data minimization, and addresses harmful data practices like the excessive collection and/or monetization of personal data. However, Wikimedia Foundation, Inc. also have concerns that certain parts of the draft law are so broad that they could have unintended consequences for the open knowledge ecosystem and other public interest projects online. In particular, its consultation response provided several recommendations about the proposed "right to erasure" in the law, which allows individuals to request that all data about them be deleted. Its submission highlighted how the maintenance of transparent records - such as revision histories, talk pages, and other artifacts of collaborative editing - are necessary for the continued operation of free and open knowledge projects like Wikipedia. While the law recognizes some important exceptions from this duty for platforms, Wikimedia Foundation, Inc. advocated additional exceptions that would protect the integrity of publicly available knowledge resources and the sources on which they rely from bad faith attempts to suppress accurate information. Wikimedia Foundation, Inc. believe that it is possible to pass privacy reform that appropriately balances personal protections with preserving the public interest infrastructure that gives Australians access to trustworthy, free and open knowledge. Championing free knowledge at WikiConference India (WCI) 2026 and beyond [Read more about WCI 2026]. India is a central focus of the Wikimedia Foundation's global public policy and advocacy efforts given its scale, regulatory dynamism, and the vibrancy of its Wikimedia volunteer communities. As one of the largest user bases for Wikimedia projects, developments in India's policy landscape have far-reaching implications not only for local contributors, but also for global norms on intermediary liability protections, platform governance, and access to knowledge. Recognizing the importance of bringing community perspectives to policy conversations in the country, Rachel Arinii Judhistari (Lead Public Policy Specialist for Asia) joined WikiConference India (WCI) in September 2026 to present a session about "Navigating India's Policy Landscape." Rachel outlined public policy priorities for free knowledge in India, shared key messages that Wikimedians can bring to lawmakers, and discussed the Global Advocacy team's current and upcoming engagements in the country. Session attendees learned how to build relationships and partnerships in order to become champions of Wikimedia's volunteer-led, public interest model. Rachel, along with other staff from the Foundation, have also been conducting outreach to lawmakers and ministers, sharing how the Wikimedia projects can contribute to government goals related to education and the preservation of local languages and culture. They recently met with several representatives of the government in Keralam (previously Kerala), including Member of Parliament Hibi Eden, Member of Legislative Assembly Chandy Oommen, former Director of General Education Snehil Kumar Singh, and Chief Minister V. D. Satheesan. These meetings helped introduce the government to Wikimedia projects and the broader open knowledge ecosystem, providing opportunities to collaborate on projects related to educational resources in the Malayalam language and also school initiatives around digital literacy. Meetings and collaborations like these help to shed light on how the Wikimedia projects differ from platforms like social media, and why they should be protected when making policy decisions about regulating the internet. Can you help Wikimedia Foundation, Inc. translate this article? In order for this article to reach as many people as possible Wikimedia Foundation, Inc. would like your help. Can you translate this article to get the message out?

Scale Up Web
Oct 27th, 2026
Wikipedia bars LLM-written articles since March 2026 as AI cleanup continues.

Wikipedia bars LLM-written articles since March 2026 as AI cleanup continues. ColdCaseTech Author Originally published on ColdCaseTech. Disclosure: this post contains affiliate links. ScaleUp Web may earn... Disclosure: this post contains affiliate links. ScaleUp Web may earn a commission at no extra cost to you. Then vs. Now (News report): Then: WikiProject AI Cleanup states that the Wikipedia guideline WP:LLM has prohibited using LLMs to generate or rewrite article content since March 2026, with limited exceptions for translation and basic copyediting. Now: Founding member Ellia Lebleu told IEEE Spectrum that Pangram flagged perhaps 20 percent of new articles and drafts as AI-generated in late 2025 and 15 or 16 percent in early 2026, and that it is too early to tell whether the rule is working. WikiProject AI Cleanup, the volunteer effort to find and remove AI-generated material from Wikipedia, states that the guideline WP:LLM has prohibited the use of large language models to generate or rewrite article content since March 2026, with limited exceptions for translation and basic copyediting (Wikipedia). In an interview published on 2026-10-21, founding member Ellia Lebleu told IEEE Spectrum that the detection company Pangram flagged perhaps 20 percent of new articles and drafts as AI-generated in late 2025, and 15 or 16 percent in early 2026 (IEEE Spectrum). Key facts. | Item | Detail | Source | | Policy | WP:LLM prohibits LLMs to generate or rewrite article content since March 2026 | Wikipedia | | Exceptions | Translation and basic copyediting | Wikipedia | | Late 2025 estimate | Pangram flagged perhaps 20 percent of new articles and drafts | IEEE Spectrum | | Early 2026 estimate | Pangram flagged 15 or 16 percent | IEEE Spectrum | | Tool in development | Wikimedia Foundation is working on Paste Check | IEEE Spectrum | Timeline. * 2022-11-30: ChatGPT was released, the date before which article text is very unlikely to be AI-generated (Wikipedia). * 2023-12-04: The first founding members added their names to the project participant list (Wikipedia). * 2026-10-21: IEEE Spectrum published its interview with Lebleu (IEEE Spectrum). Details (as reported). The project's stated goals include identifying AI-written text, identifying AI-generated images, keeping track of AI-using editors, educating editors, and protecting against disruption from AI agents (Wikipedia). A lot of LLM-generated text inserted from 2022 to 2026 remains on the site, according to the project page, and pages clearly entirely LLM-generated can be nominated for speedy deletion under WP:G15 (Wikipedia). Early articles repeated phrases such as "stands as a testament" or "rich cultural heritage", while by 2025 the signs had become subtler and more structural (IEEE Spectrum). Lebleu called fake or misleading citations a major worry, adding that AI more often finds a real source but gets its content completely wrong (IEEE Spectrum). Lebleu explained that Pangram was tested on Wikipedia content from before ChatGPT and found no false positives, so its results provide a very conservative lower bound (IEEE Spectrum). The vast majority of AI-generated content is submitted by beginner editors, Lebleu added, and the rule has been made visible in welcome messages, editing help and advice (IEEE Spectrum). On tooling, another Wikipedia editor has built an AI source verifier that checks whether the sources on a page match the claims, and the Wikimedia Foundation is developing Paste Check to flag text pasted directly from some AI chatbots (IEEE Spectrum). The Foundation is also working on an attribution framework that could show AI users when an article was last edited, how comprehensive it is and whether editors have flagged problems (IEEE Spectrum). Keep one backup somewhere else. A copy of critical data with a second provider means one compromised account or one regional outage cannot take everything down with it. See Contabo storage plans (affiliate link) What is not yet confirmed. * Lebleu stated that it is still a little early to tell whether the rule prohibiting AI writing is working (IEEE Spectrum). * It is not yet known whether the drop in flagged content reflects the recent policies or models getting more powerful before Pangram has had time to adapt, according to Lebleu (IEEE Spectrum). * Because the AI source verifier is itself an AI model, there is no guarantee it will be correct every time, Lebleu stated (IEEE Spectrum). Sources. Tools related to this case. * A standby server outside your main cloud for failover: Contabo dedicated servers * Routing optimizer for unstable or high-latency connections: GearUP * Keeps routers and home servers up through short power cuts: UPS battery backups These are affiliate links: ScaleUp Web may earn a commission at no extra cost to you. As an Amazon Associate, ColdCaseTech earns from qualifying purchases. ColdCaseTech is an independent record of technology's promises: every line links to its source. New cases daily at coldcasetech.com. Follow on X, Bluesky or Telegram. ColdCaseTech Technology contributor sharing insights via Dev.to.

MarketScreener
Oct 21st, 2026
Governments, companies take websites offline over PHP flaws.

Governments, companies take websites offline over PHP flaws. Published on 10/21/2026 at 11:07 am EDT - Modified on 10/22/2026 at 01:44 pm EDT Oct 22 (Reuters) - Several government, school and hospital websites across Europe and beyond were taken offline on Wednesday as organizations rushed to protect themselves from two critical security flaws in PHP, a programming language that powers a large share of the internet. Cybersecurity agencies across the world warned that organizations unable to apply fixes in time should consider taking affected sites offline. PHP's developers said a set of new updates fixing two previously identified critical vulnerabilities was available. Here are some major websites and services taken offline or otherwise affected: A spokesperson for the German digital ministry said on Wednesday the federal IT service provider ITZBund had taken several websites offline due to the discovery of PHP vulnerabilities. The temporary deactivation was purely preventive and no security incidents were known to have occurred, the spokesperson said. The Interior Ministry said it had temporarily taken offline the websites of prefectures, which are local government administrative offices, while awaiting a security fix for the PHP framework they use. It said the move was a precaution pending a patch from the framework's publisher. Belgium's foreign ministry said it had temporarily taken its websites offline following reports of cyberattacks exploiting the PHP vulnerabilities, although the country's cybersecurity centre said it had not recorded any attacks on Belgian websites. NETHERLANDS Many organizations followed the example of the National Cyber Security Centre and preventively took their public-facing sites offline. They included the Port of Rotterdam, government site Overheid.nl, the national football association KNVB, the websites of the five largest political parties and numerous hospital websites across the country. State IT centre Valtori shut down the government's public web services on Wednesday as "a precautionary measure." Valtori said it had not identified any attempt to exploit the flaws and that the outage was not the result of a data breach. CZECH REPUBLIC The Czech government took its website offline on Wednesday at 7 p.m. (1700 GMT) at the recommendation of the country's cyber watchdog to "allow for the implementation of necessary security patches." "The measure aims to ensure the secure operation of the website. During the shutdown, the site and its content will not be accessible to the public. Services will be restored once the recommended security updates have been applied," the government office said. The Wikimedia Foundation, which runs online encyclopedia Wikipedia, said it was in the process of addressing security vulnerabilities in the PHP programming language. All foundation-supported systems and volunteer-run systems that use PHP are affected, the foundation said in a statement. "We have taken down a number of other systems as a precautionary measure until they can be safely patched," the foundation added. INTERNET ARCHIVE The non-profit digital library took its portal offline on Wednesday due to emergency maintenance and security patches, it said in an X post. The website is back online. The French telecoms group temporarily suspended access to a number of websites and applications using the PHP programming language as a precaution. The measure affects websites, services and applications across several subsidiaries and entities. Japan's Ministry of Finance and Meteorological Agency partially suspended online services to implement safety measures, while Japan's National Tax Agency temporarily took down its service. Several Japanese companies, including brokerage Nomura, lender Mitsubishi UFJ Financial Group, airline ANA and East Japan Railway, said they were also temporarily suspending some internet services as part of emergency measures. UNITED KINGDOM The British public service broadcaster BBC said it had taken down some web portals on Wednesday. The broadcaster also reported several municipalities taking down their web services, including the city of Edinburgh. The Government of Canada said in a statement that some of its websites may be temporarily unavailable or experience service disruptions, adding that there is no indication at this time that any of its systems or information holdings have been compromised. (Reporting by Anzar Mehraj, Prathik Jayaprakash in Bengaluru, Jason Hovet, Fabrizio La Rocca and Mirko Miorelli in Gdansk; editing by Arpan Varghese, Bill Berkrot, Matt Scuffham and Maju Samuel) (C) Reuters - 2026

Wikimedia Foundation
Oct 21st, 2026
Impact of PHP vulnerabilities on Wikimedia tools and services.

Impact of PHP vulnerabilities on Wikimedia tools and services. The Wikimedia Foundation is currently preparing for two critical security vulnerabilities in PHP, the programming language that underpins much of what Wikimedia Foundation, Inc. operate today. These vulnerabilities are severe and require affected website owners to take immediate action. This issue is not specific to the Wikimedia Foundation, but affects any website running PHP. This is a significant internet security vulnerability that many organizations are responding to right now. You may see outages for its wikis as Wikimedia Foundation, Inc. work on this, and Wikimedia Foundation, Inc. has deliberately taken many of its supporting services offline until they can be safely patched. These include services (such as Toolforge and Cloud VPS) that volunteer developers support and use that are hosted within Wikimedia Foundation infrastructure but require service owners who are volunteer developers to make a change before they can come back online. These services will be offline until they can be safely brought back online. For some of these services, users have direct control over what PHP version they use, making it more difficult for Wikimedia Foundation staff to safely restore these services - they may be offline for longer. Foundation staff are working rapidly to triage, contact documented service owners, and upgrade systems where they have the access to do so. If you notice a compromised system or wish to report a security issue, please follow the security bug reporting process, which is monitored closely by the Wikimedia Foundation's security team. Edit: Updated 15:52 UTC to acknowledge wiki outages as Wikimedia Foundation, Inc. is working on this. Can you help Wikimedia Foundation, Inc. translate this article? In order for this article to reach as many people as possible Wikimedia Foundation, Inc. would like your help. Can you translate this article to get the message out?

Swarmnetics
Oct 13th, 2026
Rogue AI agents at it again with abuse of Wikimedia.

Rogue AI agents at it again with abuse of Wikimedia. October 13, 2026 Wikimedia has reported massive amounts of abusive behavior, including an apparent outright hacking attempt on the Etherpad tool, though much of it seems to be rogue AI agents abusing editing features as a workaround means of communication. Another day, another incident involving rogue AI agents from several months ago that has been unearthed. And in this case, over-eager OpenAI agents are once again to blame. This time out, Wikimedia has reported massive amounts of abusive behavior that took place primarily from May to June 2026. This did include an apparent outright hacking attempt on the Etherpad tool, but much of it seems to be rogue AI agents abusing editing features as a workaround means of communication and fetching files from third party sites. Wikimedia says it found no signs of collaboration between the agents, but the story bears similarities to the prior incidents with abuse of the German message board and other sites as a "workaround" way to overcome write restrictions during testing. Rogue AI models descend on public sites once again. Though there may not have been collaboration in this case, it seems numerous rogue AI agents hit upon the same "creative" solution for getting around their restrictions: finding an available public resource and abusing it. Wikimedia has provided less in the way of technical details than some other incidents involving rogue AI agents, but from the broad strokes it does look like a case of them either single-mindedly pursuing some research goal or attempting to communicate with each other while under write or file access restrictions (or maybe a combination of both). This included trying to hack Etherpad, Wikimedia's publicly accessible citation tool. The agents also collectively made millions of edits, but mostly in non-readable sandbox sections of wikis. The timeframe that this took place in also lines up with other cases of "misaligned" OpenAI agents going off the rails during research tasks, the most prominent being the attack on the Australian Institute of Health and Welfare in the pursuit of non-public statistics (thought to be the first ever independent attack by rogue AI agents on a government website). Out-of-control AI agents can DDoS sites; will there ever be charges? Setting aside the Etherpad incident, the OpenAI agents did not appear to be trying to hack the site in this case. But they did generate enough traffic to potentially slow its services, and Wikimedia believes rogue AI agents were a contributor to sporadic outages of their services that took place over a few days in May. Much has been made recently of charging frontier developers under the Computer Fraud and Abuse Act (and similar laws) criminally to hold individual people responsible for these incidents. The Wikimedia attack leaves less room than some others for such charges, but it does bring up an interesting angle: how should denials of service and outages that cause business interruption, or the limiting of access to a public good, be handled? Can charges be brought if the AI's intentions are not malicious, but the methods it settles on are abusive and damaging? Some of this may soon be settled by new regulation. The AI Agent Accountability Act was introduced to the Senate in early October (with bipartisan support), and raises the direct possibility of holding AI developer executives responsible for rogue AI agent actions. In the meantime organizations can mitigate risk by not only limiting what AI agents can access independently, but also clarifying how agents should be instructed to approach their tasks.

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