DATA API CUSIP: POLYGON.IO
Polygon.io (now Massive)
Real-time and historical stock, options, forex, and crypto data — rebranded to Massive in 2026
QUICK FACTS · TERMINAL DATA LIVE
- Asset coverage
- US Equities · US Options · Forex · Crypto · Global Indices
- Historical depth
- 2003–present (equities)
- Data latency
- tick
- API types
- REST · WebSocket · SDK
- SDKs
- Python · JavaScript · Go · Kotlin · Swift
- Rate limits
- Free: 5/min; Starter: 15/min; Developer+: unlimited
- Data formats
- JSON
- Affiliate
- — NO
- Last updated
- 2026-05-27
FIT PROFILE RATED
- API quality
- ★★★★☆ 4/5
- Doc quality
- ★★★★☆ 4/5
- Community
- large
▲ 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
Pricing Plans
Stocks Basic
$0/mo
EOD data, 5 calls/min
Stocks Starter
$29/mo
15-min delayed data
Stocks Developer
$79/mo
15-min delayed data, unlimited calls
Stocks Advanced
$199/mo
Real-time data, WebSocket, full history
▲ Free Tier · Free tier (Stocks Basic): 5 API calls/min, EOD data only, no real-time
Head-to-Head Matchups
Run Polygon.io (now Massive) against every other provider — 22 matchups indexed.
vs Data APIs · 17
Polygon.io (now Massive) vs AllTick Polygon.io (now Massive) vs Alpaca Polygon.io (now Massive) vs Alpha Vantage Polygon.io (now Massive) vs Databento Polygon.io (now Massive) vs EODHD (EOD Historical Data) Polygon.io (now Massive) vs Financial Modeling Prep Polygon.io (now Massive) vs Finazon Polygon.io (now Massive) vs Finnhub Polygon.io (now Massive) vs IEX Cloud (Discontinued) Polygon.io (now Massive) vs Intrinio Polygon.io (now Massive) vs Marketstack Polygon.io (now Massive) vs MetaAPI Polygon.io (now Massive) vs Nasdaq Data Link Polygon.io (now Massive) vs OANDA Polygon.io (now Massive) vs Tiingo Polygon.io (now Massive) vs Tradier Polygon.io (now Massive) vs Twelve Data
vs Brokers · 2