Alpaca
Commission-free US brokerage built around trading and market data APIs
About Alpaca
Alpaca is an API-first brokerage for US stocks, ETFs, options and crypto, with paper trading and market data APIs. Individuals use it for algo trading; businesses can build brokerage products on top. It advertises no commissions on US-listed securities for self-directed individual accounts.
Pros
- Simple, well-documented API
- Free paper trading
- Commission-free US trading
Cons
- Mostly US securities
- Best real-time data costs extra
- Little traditional platform tooling
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