Lean (proof assistant)

Lean - software for interactive and automated theorem proving. This programming language is the 358^th most popular in the global Wikipedia ranking of programming languages and the 316^th most popular programming language in English Wikipedia. Article “Lean (proof assistant)” in English Wikipedia has 41.4 points for quality (as of July 1, 2025). The article contains 28 references and 11 sections.

This article has the best quality in Chinese Wikipedia. However, this article is the most popular in English version.

In June 2025 the article “Lean (proof assistant)” was edited by 4 authors in English Wikipedia and written by 9 authors in all languages.

Since the creation of article “Lean (proof assistant)”, its content was written by 66 registered users of English Wikipedia and edited by 131 registered Wikipedia users in all languages.

Lean is on the 316^th place in local ranking of programming languages in English Wikipedia and on the 358^th place in global ranking of programming languages in all the time.

The article is cited 350 times in English Wikipedia and cited 493 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #18174 in October 2023
• Global: #28697 in June 2024

The highest popularity rank from 2008:

• Local (English): #82170 in June 2025
• Global: #114703 in June 2025

There are 14 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	Chinese (zh) Lean		43.701
2	English (en) Lean (proof assistant)		41.432
3	Japanese (ja) Lean (証明アシスタント)		40.2582
4	Korean (ko) Lean (증명 보조기)		36.9689
5	German (de) Lean (Beweisassistent)		33.1162
6	Persian (fa) لین (دستیار اثبات)		27.3846
7	Spanish (es) Lean		27.0661
8	Ukrainian (uk) Lean		24.9345
9	Russian (ru) Lean		21.3667
10	Vietnamese (vi) Lean (trợ lý chứng minh)		13.4232

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The following table shows the most popular language versions of the article.

The most popular language versions of the article "Lean (proof assistant)" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Lean (proof assistant)		296 974
2	Japanese (ja) Lean (証明アシスタント)		12 226
3	Russian (ru) Lean		10 798
4	Spanish (es) Lean		8 844
5	French (fr) Lean (assistant de preuve)		8 560
6	Chinese (zh) Lean		6 592
7	German (de) Lean (Beweisassistent)		5 673
8	Ukrainian (uk) Lean		592
9	Portuguese (pt) Lean (linguagem de programação)		456
10	Czech (cs) Lean (programovací jazyk)		435

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The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "Lean (proof assistant)" in June 2025

#	Language	Popularity award	Relative popularity
1	English (en) Lean (proof assistant)		13 505
2	Japanese (ja) Lean (証明アシスタント)		1 112
3	Chinese (zh) Lean		933
4	German (de) Lean (Beweisassistent)		463
5	French (fr) Lean (assistant de preuve)		372
6	Russian (ru) Lean		348
7	Spanish (es) Lean		158
8	Portuguese (pt) Lean (linguagem de programação)		84
9	Czech (cs) Lean (programovací jazyk)		38
10	Korean (ko) Lean (증명 보조기)		32

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The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "Lean (proof assistant)" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Lean (proof assistant)		66
2	German (de) Lean (Beweisassistent)		13
3	French (fr) Lean (assistant de preuve)		12
4	Japanese (ja) Lean (証明アシスタント)		8
5	Russian (ru) Lean		8
6	Persian (fa) لین (دستیار اثبات)		4
7	Dutch (nl) Lean (bewijsassistent)		4
8	Vietnamese (vi) Lean (trợ lý chứng minh)		4
9	Spanish (es) Lean		3
10	Portuguese (pt) Lean (linguagem de programação)		3

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The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "Lean (proof assistant)" with the highest AI in June 2025

#	Language	AI award	Relative AI
1	English (en) Lean (proof assistant)		4
2	Korean (ko) Lean (증명 보조기)		2
3	German (de) Lean (Beweisassistent)		1
4	Japanese (ja) Lean (証明アシスタント)		1
5	Chinese (zh) Lean		1
6	Czech (cs) Lean (programovací jazyk)		0
7	Spanish (es) Lean		0
8	Persian (fa) لین (دستیار اثبات)		0
9	French (fr) Lean (assistant de preuve)		0
10	Dutch (nl) Lean (bewijsassistent)		0

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The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "Lean (proof assistant)" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Lean (proof assistant)		350
2	Russian (ru) Lean		76
3	Chinese (zh) Lean		36
4	French (fr) Lean (assistant de preuve)		8
5	German (de) Lean (Beweisassistent)		5
6	Japanese (ja) Lean (証明アシスタント)		5
7	Czech (cs) Lean (programovací jazyk)		4
8	Spanish (es) Lean		4
9	Ukrainian (uk) Lean		2
10	Korean (ko) Lean (증명 보조기)		1

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#	Language	Value
cs	Czech Lean (programovací jazyk)
de	German Lean (Beweisassistent)
en	English Lean (proof assistant)
es	Spanish Lean
fa	Persian لین (دستیار اثبات)
fr	French Lean (assistant de preuve)
ja	Japanese Lean (証明アシスタント)
ko	Korean Lean (증명 보조기)
nl	Dutch Lean (bewijsassistent)
pt	Portuguese Lean (linguagem de programação)
ru	Russian Lean
uk	Ukrainian Lean
vi	Vietnamese Lean (trợ lý chứng minh)
zh	Chinese Lean

Best Rank

English: #82170 06.2025

Global: #114703 06.2025

Best Rank

English: #18174 10.2023

Global: #28697 06.2024

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The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information