Alpaca has integrated with QuantConnect, a leading algorithmic trading platform used by thousands of professional traders and quants. This integration allows users to design, backtest, and trade algorithmic strategies within minutes for supported asset classes including stocks, ETFs, options, and cryptocurrencies. Founded in 2012, QuantConnect has built an online algorithmic research and trading platform with over 300,000 members executing $5 billion in notional trading volumes each month. The partnership includes the open-sourcing and maintenance of the LEAN-Alpaca plugin, enabling users to fork the code base and extend it as they see fit. Alpaca Securities LLC and QuantConnect are not affiliated, and neither are responsible for the liabilities of the other.