Massive (formerly Polygon.io) is a developer-first financial data platform that democratizes access to institutional-grade market data. The platform provides comprehensive real-time and historical datasets covering US equities, options, forex, and cryptocurrencies. By offering robust REST APIs, WebSockets, and flat file downloads, Massive enables quantitative analysts, fintech developers, and financial institutions to seamlessly integrate tick-level market data into trading algorithms, charting applications, and quantitative models without managing complex infrastructure.