Massive (formerly Polygon.io) alternatives
10 other financial data listed here. Massive (formerly Polygon.io) is freemium.
Alpha Vantage Featured
Stock, forex and crypto data through a REST API
CoinGecko API
Crypto prices and market data
EOD Historical Data
Historical and live market data for global exchanges
Financial Modeling Prep
Prices, statements and ratios through a REST API
Finnhub
Real-time quotes, fundamentals and news
FRED API
Economic time series from the St. Louis Fed
OpenBB
Open-source investment research platform
SEC EDGAR
US public company filings database
Twelve Data
Market data for stocks, forex, ETFs and crypto
yfinance
Python library for Yahoo Finance data