Lean Engine
QuantConnect’s open-source algorithmic trading engine for research, backtesting, and live trading.
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Algorithmic Trading Tools
Tools for algorithmic trading.
Jesse
A self-hosted Python framework for crypto strategy development and backtesting.
Hummingbot
An open-source Python framework for automated crypto trading and market making.
Interactive Brokers API
Broker APIs for market data, account access, and automated trading.
Financial Modeling Prep
A financial data API for prices, company fundamentals, filings, and news.
Databento
A market data API for historical and real-time equities, futures, and options data.
Unusual Whales
A market data platform focused on options flow and institutional activity.
Quiver Quantitative
An alternative-data platform for investment research and strategy backtesting.
Finviz
A stock research site with screeners, charts, and market maps.
Koyfin
A financial research platform for markets, portfolios, and reports.
Portfolio Visualizer
A web platform for portfolio backtesting, simulation, and investment analysis.
Quantpedia
A research database of quantitative trading strategies and academic sources.
Option Alpha
An options platform for finding opportunities, testing ideas, and automating trades.
Composer
A visual platform for building, backtesting, and automating investing strategies.
QSTrader
An open-source Python backtester for systematic equity and ETF portfolios.
Lumibot
A Python framework for AI-assisted and rule-based algorithmic trading.
NautilusTrader
An open-source trading platform with a Rust core and Python strategy API.
Backtesting.py
A Python framework for testing trading strategies on historical price data.