BT Bloomberg L.P. (FIGI Registration Authority) · Market & fundamentals data
Bloomberg's subscription workstation for market data, news, analytics, messaging and execution, with Excel integration and the BLPAPI library for C++, Java, .NET and Python
Proprietary Paid Enterprise Local Nov 2, 2026IB Interactive Brokers LLC · Financial analysis & investing
In-depth entry Programmatic trading and market-data access to Interactive Brokers accounts through the TWS API, the REST-based Web API and FIX
Proprietary Usage-based Paid Local RedirectedP Robert Andrew Martin and contributors · Portfolio & wealth management
Python library for portfolio optimization: efficient frontier, Black-Litterman, hierarchical risk parity and discrete allocation
MIT Open source Free Local Nov 2, 2026Q QuantConnect Corporation · Financial analysis & investing
In-depth entry Algorithmic trading platform built on the open-source LEAN engine, with cloud backtesting, research notebooks and brokerage-connected live trading
Apache-2.0 Freemium Paid Local Nov 2, 2026Q QuantLib project (Luigi Ballabio and contributors) · Financial analysis & investing
In-depth entry Open-source C++ library for quantitative finance covering instruments, term structures, pricing engines and calendars, with Python and other bindings
BSD-3-Clause Open source Free Local Nov 2, 2026R Dany Cajas · Portfolio & wealth management
Python library for quantitative portfolio optimization with many risk measures, robust estimators and hierarchical clustering models
BSD-3-Clause Open source Free Local Nov 2, 2026V 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-Clause Free Paid Local Nov 2, 2026ZR 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-2.0 Open source Free Local Broken