QuestDB

Fastest open-source time-series database for high-frequency financial data.

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Last updated May 22, 2026 (about 3 months ago).

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QuestDB is a column-oriented, time-series database built from scratch, optimized for high-frequency financial and IoT data ingestion with low-latency SQL analytics. It employs an open-source strategy as a sales qualification engine, enabling enterprises to self-select through adoption before converting to the commercial Enterprise tier. The platform targets regulated financial infrastructure where performance and open formats are critical.

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peopleMay 22, 2026

QuestDB Releases 9.4.0 with Parquet Metadata Sidecar and Performance Speedups in GROUP BY and Joins

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The QuestDB team released version 9.4.0 on May 18, 2026. Each Parquet partition now includes a compact binary _pm sidecar file storing column descriptors, row-group byte ranges, encodings, and min/max statistics to enable row-group pruning without opening data files. Parallel keyed GROUP BY achieves up to 4.6x speedup on single-column count() queries over fixed-size keys, while hash finalizer and denser tables deliver 15-25% improvements on GROUP BY and hash-join workloads. The release also includes multiple SQL planner and WAL bug fixes.

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QuestDB

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Recent published developments

QuestDB Releases 9.4.0 with Parquet Metadata Sidecar and Performance Speedups in GROUP BY and Joins

QuestDB

Profile

Recent published developments

QuestDB Releases 9.4.0 with Parquet Metadata Sidecar and Performance Speedups in GROUP BY and Joins

QuestDB Is Hiring a Cloud Engineer Position Involving Kubernetes and Terraform

QuestDB Continues Hiring for Core Database Engineer Role Focused on C++ and Rust

QuestDB Releases 9.4.0 with New SYMBOL Column Index Ahead of Version 10.0

QuestDB 9.4.0 ships posting index and cross-column FILL features

QuestDB Actively Hiring Core Database Engineer and Head of Growth Roles

QuestDB Named Best Trading Analytics Platform at TradingTech Insight Europe 2026 Awards

QuestDB 10.0 Release Imminent After Extended 9.x Line

QuestDB Wins Best Trading Analytics Platform at TradingTech Insight Europe 2026 Awards

QuestDB Seeks Head of Growth to Drive Open-Source Adoption and Pipeline

QuestDB Publishes Deep Dive on WINDOW JOIN Parallelization and Vectorization

QuestDB CTO Vlad Ilyushchenko Accepts Best Trading Analytics Platform Award at TradingTech Insight Europe 2026

OpenMetadata Adds QuestDB Database Connector in Latest Commit

QuestDB hires former Snowflake exec as new CTO to drive innovation in time-series databases for IoT and finance sectors.