QuestDB

QuestDB is an open-source, high-performance time-series database designed for demanding, latency-sensitive workloads, especially those driven by real-time data, trading, and AI agents. It is purpose-built for fast ingestion and query performance, supports standard SQL, offers multi-tier storage, and natively supports open data formats like Parquet. QuestDB is trusted in production by leading firms in finance, aerospace, and other industries for use cases requiring low-latency analytics and scalability.