QuantConnect is an open-source algorithmic trading platform founded in 2012, catering to a global community of over 280,000 quants, engineers, and financial professionals. The company offers a hybrid desktop-cloud infrastructure known as LEAN, which allows users to design, backtest, and deploy algorithmic trading strategies across more than 10 asset classes. The platform focuses on democratizing quantitative finance by providing institutional-grade tools to individual investors and emerging funds. Key offerings include the LEAN Engine for strategy development in Python and C#, scalable cloud backtesting resources, and a live trading infrastructure that manages over $2 billion in monthly trading volume. QuantConnect also provides integrated financial datasets and enterprise solutions for funds and fintech firms, promoting collaboration and compliance. The company aims to create a meritocracy in trading, where top-performing strategies are recognized and licensed as Alpha models.