Analyzed
1 day
ago.
based on code collected
1 day
ago.
Project Summary
Lean Theorem Prover
In a Nutshell, lean...
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has a well established, mature codebase
maintained by a very large development team
with increasing Y-O-Y commits -
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took an estimated 1,529 years of effort (COCOMO model)
starting with its first commit in July, 2013
ending with its most recent commit 2 days ago
Quick Reference
https://github.com/leanprover/lean4
Apache License 2.0
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Sub-License
Private Use
Use Patent Claims
Forbidden
Hold Liable
Use Trademarks
Required
Include Copyright
State Changes
Include License
Include Notice
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Poor security track-record
Favorable security track-record
Vulnerability Exposure Index
Many reported vulnerabilities
Few reported vulnerabilities
Did You Know...
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use of OSS increased in 65% of companies in 2016
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search using multiple tags to find exactly what you need
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30 Day SummaryJan 22 2026 — Feb 21 2026
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12 Month SummaryFeb 21 2025 — Feb 21 2026
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