QuantConnect
A comprehensive, cloud-based algorithmic trading platform supporting backtesting and live trading. Its core engine, Lean, is open-source and written in C#.
QuantConnect: Algorithmic Trading Platform
QuantConnect provides a unified API for quantitative research, backtesting, and live trading. The platform is designed for a range of users, from beginners to experts, providing tools to navigate expanding datasets and technological developments in the financial markets.
Research and Strategy Development
The platform offers a suite of cloud-based tools to facilitate the discovery of alpha. Users can research investment approaches and assess strategy performance through backtesting. For organizations with bespoke requirements or proprietary datasets, a Local Platform is available to replicate the cloud experience on-premise.