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
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
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