TradingDataCompare

Finnhub vs Polygon.io (now Massive)

Head-to-head comparison of two trading data providers. Updated 2026-05-23.

Side-by-Side Comparison

Feature Finnhub Polygon.io (now Massive)
API Quality 4/5 4/5
Doc Quality 4/5 4/5
Free Tier Yes Yes
Affiliate Program No No
Data Latency second tick
SDK Languages 5 languages 5 languages
Asset Coverage US Equities, Global Equities, Forex, Crypto, ETFs US Equities, US Options, Forex, Crypto, Global Indices
Historical Depth 30+ years (daily); 1 year intraday on free 2003–present (equities)
Starting Price $0/mo $0/mo
Rate Limits Free: 60/min; paid: 300/min Free: 5/min; Starter: 15/min; Developer+: unlimited

Finnhub: Best For

  • Indie developers
  • Screener apps
  • Sentiment / news analytics
  • Global equities

Not Ideal For

  • Tick data / HFT
  • Deep intraday history free tier
  • Futures
Full Finnhub review →

Polygon.io (now Massive): Best For

  • Algo traders
  • Fintech app developers
  • Options traders
  • Crypto quants

Not Ideal For

  • Tick-level HFT (DBZ format not available)
  • Institutional order book depth
Full Polygon.io (now Massive) review →

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