Citizendium

6.2easy start · #28of 31
in Online Encyclopedias

Well documentedyes
Runs where you workno

Runs on Web.

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Citizendium is ranked #28 of 31 in online encyclopedias on The Geeks Club. It runs on Web.

Compared on online encyclopedias

Free plan: Yes
Citation tools: Yes
Content formats: text
Update frequency: not stated

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The record

What it is: Citizendium describes itself as a wiki for providing free knowledge.
Contributors: The welcome page says authors use their real names and invites anyone to share knowledge on virtually any subject.
Community: The welcome page describes its online community as congenial and supportive.
Subject areas: The welcome page lists workgroups across subjects including agriculture, anthropology, biology, business, chemistry, economics, education, history, law, physics, and psychology.
Article statuses: The welcome page groups articles into Citable, Developed, Developing, and Stubs.
Editing help: A Citizendium getting-started page points contributors to a sandbox where they can test editing.
Support: The getting-started page says contributors can seek help in the forum or by leaving a note on a user's or editor's talk page.
Policy discussions: The getting-started page says the forum is also used to discuss policy and proposals.
Current workgroups: A Citizendium workgroup category page says workgroups are no longer used for group communications, but still group articles into fields of interest.
Article metadata: The workgroup category page says each article is assigned to one to three workgroups via its metadata.
Notable limit: The welcome page reports 16,436 articles in total, including 146 Citable, 1,125 Developed, 7,368 Developing, and 7,666 Stubs.
Software access: The opened Citizendium pages present the encyclopedia as a web wiki; they do not state downloadable desktop or mobile apps, platform support beyond the web, or an API.

Where it ranks on The Geeks Club

Best Online Encyclopedias in 2026#28 of 31

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Sources

citizendium.org/wiki/index.php· checked 9 Oct 2026
citizendium.org/wiki/User_talk%3AKelly_D_Johnston· checked 9 Oct 2026
en.citizendium.org/wiki/index.php· checked 9 Oct 2026