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Where sigc fits, and where it doesn't.

sigc is opinionated about a typed, deterministic signal-to-portfolio pipeline. These tools each solve a real, adjacent problem. Fair rows, no winners declared.

sigc vs vectorbt

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Vectorised backtesting on top of NumPy/Numba in Python.

A typed compiled DSL with a content-addressed cache versus a fast Python vectorised backtesting library. Different problems: reproducibility and a unified research-to-production binary versus parameter-sweep throughput inside notebooks.

sigc vs QuantConnect Lean

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Open-source event-driven trading engine in C# / Python.

A signal-to-portfolio compiler versus a full event-driven trading engine with broad brokerage integrations. sigc focuses on the alpha half; Lean owns the whole execution loop.