4 tools
Alpha Vantage Inc. · Market & fundamentals data
REST API for stock, ETF, options, forex, crypto, commodity and economic data plus fundamentals, news sentiment and technical indicators, with a free key tier and premium plans
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
Massive (Polygon.io, Inc.) · Market & fundamentals data
Market data platform (renamed from Polygon.io in October 2025) with REST and WebSocket APIs, flat files and SQL access for US stocks, options, indices, forex, crypto and futures
The Wharton School, University of Pennsylvania · Market & fundamentals data
Institution-subscribed research data platform from Wharton hosting CRSP, Compustat, TAQ, OptionMetrics and dozens of other vendors' databases with web queries, SQL, SAS, Python and R access
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