Introduction
Fintech engineers building backtesting engines, live quote dashboards, and algorithmic trading pipelines repeatedly face consistent pain points with market data APIs: limited granularity on free tiers, disjoint real-time and historical endpoints, inconsistent protocol support, and fragmented cross-asset coverage. This neutral technical breakdown compares three widely adopted market data providers, evaluating native functionality and end-to-end integration patterns to streamline API vendor selection for backend and quant teams.
Core Evaluation Criteria
Data Granularity & Historical Depth: Support for tick, intraday, and daily bars plus long-term archived records across equities and FX
Protocol Compatibility: Native REST batch query and WebSocket real-time streaming implementation
