> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ziplime.limex.com/llms.txt
> Use this file to discover all available pages before exploring further.

# From QuantConnect & Lean

> Bringing Lean strategies to Ziplime

If you have strategies built on **QuantConnect**, running on the open-source **Lean** engine, Ziplime's AI can help port that logic to its own Python/Zipline-based engine.

Because both Lean and Ziplime use Python, migration is often more direct than from a non-Python platform — but the underlying APIs differ (data access, order placement, scheduling), so the agent team will still rewrite strategy internals against Ziplime's API rather than doing a literal copy-paste.

<Note>
  Compare backtest results before and after migration. Even with similar Python roots, differences in data handling and fill assumptions between Lean and Zipline can shift results.
</Note>