Citizendium

At a glance

• Editor score
  6.9 / 10
• Pricing
  Free plan
• Best for
  Readers preferring real-name collaboration
• Free plan
  Yes
• Paid from
  Free
• Citation tools
  Yes
• Facts checked
  24 Sep 2026

• Where it wins

  • Free access with collaborative article editing
  • Real-name contributors and a contributor application process
  • Citable articles with histories and version viewing

• Where it doesn't

  • Text-only content limits the format's breadth
  • Contributor access includes an application process
  • Subject coverage is narrower than broader encyclopedias

Our verdict on Citizendium

Citizendium is a free, web-based online encyclopedia and wiki for readers who want to browse, cite, and review collaboratively developed articles. Its defining distinction is the real-name contributor model: people who create and improve entries identify themselves rather than contributing anonymously. The project emphasizes civility, objectivity, and quality, while supporting article histories, version viewing, and a dedicated citable articles section. That combination makes Citizendium a fit for readers who value accountable collaboration and want more context around how written entries develop.

Pricing is straightforward: Citizendium is free, with no paid tier structure presented in its published product details. The web platform provides access to encyclopedia articles, collaborative editing, contributor applications, and Creative Commons-licensed written content. For buyers or teams evaluating an encyclopedia resource, that means the product is easy to assess from a cost perspective, but its value depends on whether a text-focused, community-edited reference fits the intended use. The citable articles section and article history tools add useful reference context beyond simply reading a finished page.

Citizendium’s strongest angle is its focused approach to collaborative reference publishing rather than a broad set of content formats or platform options. Contributors can apply to join the community, and readers can inspect article versions while consulting citable entries. The tradeoff is narrower breadth: readers seeking the widest possible subject coverage, richer media formats, or a more expansive encyclopedia ecosystem should consider an alternative. Choose Citizendium for free web access, real-name participation, citation-oriented reading, and transparent article histories; choose elsewhere when broad coverage or formats beyond written content matter more.

Your product? Our editors can test Citizendium in depth and publish a review, labelled as paid · from $149/mo →

Citizendium pricing

Citizendium fact sheet

Alternatives to Citizendium

• WikipediaA broad, free reference resource with multilingual search and transparent article histories.9.4
• EBEncyclopaedia BritannicaA fact-checked, multimedia reference service with strong classroom and accessibility tools.9.2
• Store norske leksikonA strong free reference for Norwegian-language research, learning and everyday questions.9.0

See all Citizendium alternatives →

Featured on iTechGuides

Citizendium is listed in our Online Encyclopedias directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update