Best for
Deep Historical Data.
Long-history backtesting and quant research requiring decades of price history across asset classes.
Ranked · Top 5
#3
Deep historical OHLCV and fundamentals for 70+ global exchanges
FROM $0/mo API REST · WebSocket SDK Python · JavaScript · R
#4
Financial Modeling Prep FREE TIER
Multi-asset financial data API with generous free tier and 30 years history on premium plans
FROM $0/mo API REST · SDK SDK Python (community) · JavaScript (community)
#5
Polygon.io (now Massive) FREE TIER
Real-time and historical stock, options, forex, and crypto data — rebranded to Massive in 2026
FROM $0/mo API REST · WebSocket · SDK SDK Python · JavaScript · Go
Cross-Reference
Other Use Cases
Best for Algo TradingBest for Crypto TradingBest for Forex TradingBest for BacktestingBest for Quant ResearchBest for Fintech App DevelopmentBest for BeginnersBest for Options TradingBest for Real-Time Market DataBest for Global EquitiesBest for Python DevelopersBest for JavaScript / Node.js DevelopersBest for WebSocket StreamingBest for Free Tier OnlyBest for Budget Under $30/moBest for Institutional / EnterpriseBest for Active TradersBest for Options Trading (Brokers)Best for Global Multi-Asset BrokersBest for Brokers with API AccessBest for Prop Firms for BeginnersBest for Prop Firms for ForexBest for 1-Step Prop Firm ChallengesBest for Highest Prop Firm Profit Splits