TRADINGDATACOMPARE
LIVE · 2026-05-27

Best for
JavaScript / Node.js Developers.

JavaScript and Node.js market data integration for web apps, dashboards, and trading frontends.

Ranked · Top 5

#1
Polygon.io (now Massive) TOP PICK 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
REVIEW →
#2
Alpaca FREE TIER

Commission-free broker API with built-in market data

FROM $0/mo API REST · WebSocket · SDK SDK Python · JavaScript · Go
REVIEW →
#3
Finnhub FREE TIER

Free real-time stock API with news, sentiment, and fundamentals

FROM $0/mo API REST · WebSocket SDK Python · JavaScript · Go
REVIEW →
#4
Tiingo FREE TIER

Affordable end-of-day and real-time data for US equities, crypto, forex with strong news API and 50+ year history

FROM $0/mo API REST · WebSocket · SDK SDK Python · JavaScript
REVIEW →
#5
AllTick FREE TIER

Multi-market real-time data API covering US, HK, CN stocks plus forex and crypto with broad asset breadth

FROM $0/mo API REST · WebSocket SDK Python · JavaScript · C#
REVIEW →

Cross-Reference

Polygon.io (now Massive) vs Alpaca Polygon.io (now Massive) vs Finnhub Alpaca vs Finnhub Alpaca vs Tiingo Finnhub vs Tiingo Finnhub vs AllTick Tiingo vs AllTick

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 Deep Historical DataBest 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