TradingDataCompare

Alpaca vs Polygon.io (now Massive)

Head-to-head comparison of two trading data providers. Updated 2026-05-24.

Overall winner: Polygon.io (now Massive) — wins 1 of 6 comparison axes.

Side-by-Side Comparison

Feature Alpaca 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 4 languages 5 languages ✓
Asset Coverage US Equities, US Options, Crypto US Equities, US Options, Forex, Crypto, Global Indices
Historical Depth 2016–present (minute bars); limited tick 2003–present (equities)
Starting Price $0/mo $0/mo
Rate Limits 200 req/min free; higher on paid plans Free: 5/min; Starter: 15/min; Developer+: unlimited

Alpaca: Best For

  • Retail algo traders
  • Python quants
  • Paper trading bots
  • US equity automation

Not Ideal For

  • International markets
  • Deep historical tick data
  • Options analytics
Full Alpaca 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 →

More Comparisons

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