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, 2026D DuckDB Foundation / DuckDB Labs · Analytical engines & OLAP
In-depth entry In-process analytical SQL database that queries Parquet, CSV and Arrow data directly from Python, R, Node or the CLI
MIT Open source Free Local Self-hosted 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 Polars (Ritchie Vink and contributors) · DataFrames & array computing
In-depth entry Rust-based DataFrame library with Python, Rust, Node and R bindings offering lazy query optimization, multithreading and Arrow-native memory
MIT Open source Free Local Nov 2, 2026