Who QuestDB is for#
Fintech teams storing market data
Use QuestDB for tick, quote, trade, and pricing data that needs fast ingestion and time-window analysis.
Skip if:
Skip if the workload is mostly transactional account data.
IoT teams analyzing sensor streams
QuestDB fits high-volume timestamped readings where SQL access and self-hosting matter.
Skip if:
Skip if you need a managed device platform rather than a database.
The problem it solves#
Time series workloads can overwhelm general-purpose databases when ingestion rates are high and queries scan large date ranges. Managed time series products reduce setup work, but they add vendor pricing, retention constraints, and migration concerns.
Teams working with market data, IoT readings, or infrastructure measurements need a database that ingests quickly, queries with familiar SQL, and can run on infrastructure they control.
How it solves it#
High-speed time series ingestion
Targets append-heavy timestamped data workloads such as market ticks, sensor events, and operational measurements.
SQL query interface
Lets analysts and developers query time series data with SQL instead of learning a niche query language first.
Self-hosted and cloud options
Teams can run QuestDB themselves or use the managed service, which supports migration from prototype to production operations.
Strengths and trade-offs#
Strengths
- Strong fit for financial and IoT dataQuestDB is purpose-built for timestamped datasets where ingestion speed and time-window queries matter.
- Apache-2.0 open source coreThe license gives teams a self-hosted path without committing all time series data to a managed service.
Trade-offs
- -Specialized database choiceQuestDB is not a general application database. Teams still need PostgreSQL, MySQL, or another transactional store for normal app data.
QuestDB vs alternatives#
QuestDB vs Amazon Timestream
QuestDB and Amazon Timestream both target time series workloads. QuestDB is an open source SQL database with self-hosting and cloud options; Timestream is a managed AWS service.
QuestDB is better when SQL familiarity, self-hosting, or cloud portability matters. Timestream is still better when the workload is already fully on AWS and the team wants AWS to operate the database.
What it's built on#
- Languages
- C++JavaRust
- Databases
- PostgreSQL
FAQ#
Is QuestDB open source?
Yes. QuestDB is open source under the Apache-2.0 license.
What is QuestDB used for?
QuestDB is used for high-ingest time series data such as financial market data, IoT sensor data, and observability measurements.
How does QuestDB compare to Amazon Timestream?
Amazon Timestream is a managed AWS time series database. QuestDB gives teams an open source SQL database they can self-host or use as a managed service.
Similar open-source tools#
TDengine
High-performance time-series database for IoT and telemetry
InfluxDB
High-performance time series database with SQL-based querying
VictoriaMetrics
High-performance self-hosted time series database and metrics
daily_stock_analysis
AI-driven stock analysis for A, HK, and US markets
Kronos
Open source foundation model for financial candlestick data
DBeaver
Free open-source database management tool for SQL databases.