QuantConnect

QuantConnect/Lean

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Lean Algorithmic Trading Engine by QuantConnect (Python, C#)

Stars
21.7k
Forks
5.3k
Open beginner issues
0
Indexed issues
240
Avg merge
2d 22h
Merged PRs (30d)
34
Dominant language
C#
License
Apache-2.0
Last GitHub push
Sep 18, 2026
Latest indexed
Sep 19, 2026
Contributing guide
Contributing guide
Code of conduct
No code of conduct
Beginner labels
good first issue
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