Alpaca is a commission-free API-first stock brokerage providing an interface for trading algorithms, market data, and account management.
Best Polygon.io API Alternatives ranked by AI · updated May 2025
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Polygon.io provides real-time and historical market data through a developer-friendly API.
Price: Variable
Top 3 Polygon.io API alternatives
Interactive Brokers provides a comprehensive trading platform with API access for algorithmic trading.
Pros
- Wide range of asset classes
- Global market access
Cons
- Complex interface
- High minimum balance requirement
TD Ameritrade offers an API for accessing market data and executing trades on their platform.
Pros
- Access to historical data
- Paper trading environment
Cons
- Limited order types
- Rate limits on API calls
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