PyPortfolioOpt
Robert Andrew Martin and contributors · Portfolio & wealth management
Python library for portfolio optimization: efficient frontier, Black-Litterman, hierarchical risk parity and discrete allocation
MITOpen sourceFreeLocalNov 2, 2026
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QuantConnect
QuantConnect Corporation · Financial analysis & investing
Algorithmic trading platform built on the open-source LEAN engine, with cloud backtesting, research notebooks and brokerage-connected live trading
Apache-2.0FreemiumPaidLocalNov 2, 2026
QuantLib
QuantLib project (Luigi Ballabio and contributors) · Financial analysis & investing
Open-source C++ library for quantitative finance covering instruments, term structures, pricing engines and calendars, with Python and other bindings
BSD-3-ClauseOpen sourceFreeLocalNov 2, 2026
Riskfolio-Lib
Dany Cajas · Portfolio & wealth management
Python library for quantitative portfolio optimization with many risk measures, robust estimators and hierarchical clustering models
BSD-3-ClauseOpen sourceFreeLocalNov 2, 2026
vectorbt
Oleg Polakow · Financial analysis & investing
Python library for vectorized backtesting and portfolio analysis built on pandas, NumPy and Numba, with a commercial PRO edition
Apache-2.0 WITH Commons-ClauseFreePaidLocalNov 2, 2026
Zipline Reloaded
Stefan Jansen (ML4Trading) · Financial analysis & investing
Community-maintained fork of Quantopian's Zipline, an event-driven Python backtester with data bundles and the Pipeline API
Apache-2.0Open sourceFreeLocalBroken
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