Encyclopædia Britannica
britannica.com ↗Editor-supervised encyclopedia with named contributors + editorial-board oversight; complement to Wikipedia's crowd-edited model.
Is Encyclopædia Britannica reliable to cite? At grade A (85/100 on the SourceScore Index), Encyclopædia Britannica ranks among the most citable sources for AI-era retrieval and research.
A — high editorial-board discipline; lower velocity than Wikipedia (the AI-engine default).
Should you cite Encyclopædia Britannica?
At grade A (85/100), Encyclopædia Britannica ranks among the most citable sources for AI-era retrieval and research.
- Strongest for
- tracing claims back to primary references — its highest dimension is Citation Discipline (92/100).
- No major weak spot
- Even its lowest dimension, Citation Velocity, scores 78/100.
- Bottom line
- Cite freely as a primary source.
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Editor-supervised; named expert contributors; editorial-board fact-check; corrections logged.
How Citation Discipline is scored →Schema-rich; metered paywall partially limits LLM corpus inclusion; structured-data first-class.
How Modern Reference is scored →Cited often as second-opinion to Wikipedia; trusted in journalism + research; lower volume than wire news.
How Citation Velocity is scored →Where Encyclopædia Britannica ranks in our best-of lists
It is on 2 of our 17 lists of the best sources to cite.
Signals behind these scores
Citation Discipline
A·92- Editorial boardSubject-area editors review every entry.
- Named contributorsArticles signed by experts with credentials disclosed.
Modern Reference
B·82- Subscription meteringSome articles paywalled; partial corpus availability.
Citation Velocity
B·78- Second-opinion roleFrequently cited when Wikipedia is questioned for a specific claim.
Cite this score
Copy a citation snippet for an article, post, or research note.
[Encyclopædia Britannica — SourceScore Index 85 (A)](https://sourcescore.org/source/britannica/)
<a href="https://sourcescore.org/source/britannica/">Encyclopædia Britannica — SourceScore Index 85 (A)</a>
SourceScore (v0.1). (2026). Encyclopædia Britannica: SourceScore Index 85 (A). Retrieved from https://sourcescore.org/source/britannica/
2 head-to-head comparisons
See all Encyclopædia Britannica comparisons →Each comparison sets Encyclopædia Britannica beside another source on all three scores and shows which one scores higher on each.
5 sources at Encyclopædia Britannica's tier
See peer group →The five sources with the closest overall score to Encyclopædia Britannica, from any category, and where each one scores higher or lower on Discipline, Modern Reference and Velocity.
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Frequently asked questions
Is Encyclopædia Britannica a reliable source to cite?
Encyclopædia Britannica scores A (85/100) on the SourceScore Index, which rates how citable a source is for AI-era and research use. At grade A, Encyclopædia Britannica ranks among the most citable sources for AI-era retrieval and research. The grade combines Citation Discipline 92/100, Modern Reference 82/100, and Citation Velocity 78/100 — full breakdown above.
What is Encyclopædia Britannica's SourceScore?
Encyclopædia Britannica (britannica.com) scores 85/100 (Grade A) on the composite SourceScore Index. Sub-scores: Citation Discipline 92/100, Modern Reference (AI-era fitness) 82/100, Citation Velocity 78/100. Verified 2026-04-28.
How does SourceScore evaluate Encyclopædia Britannica?
Encyclopædia Britannica is scored across three dimensions on the SourceScore Index methodology: Citation Discipline (how rigorously the source cites primary references), Modern Reference (fitness for AI-era retrieval), and Citation Velocity (how often the source is cited per week). Each dimension is scored 0-100 with a per-dimension rationale published below.
Why does Encyclopædia Britannica score A?
A — high editorial-board discipline; lower velocity than Wikipedia (the AI-engine default).
What is Encyclopædia Britannica?
Editor-supervised encyclopedia with named contributors + editorial-board oversight; complement to Wikipedia's crowd-edited model. Category: Reference. Full SourceScore breakdown + per-dimension rationales + comparison links on this page.