Time-series databases · QuestDB Technology Inc.
QuestDB
High-throughput open-source time-series database with SQL, built for fast ingestion of market, IoT and metrics data.
QuestDB is an open-source time-series database written for very high ingestion throughput and fast SQL analytics over time-stamped data, commonly used for financial market data, IoT telemetry and application metrics. It uses a column-oriented storage engine with its own SIMD-optimized query execution and supports standard SQL extended with time-series-specific syntax such as SAMPLE BY for downsampling and ASOF JOIN for aligning irregular time series. QuestDB ingests over Postgres wire protocol, InfluxDB line protocol, and a REST API, which lets it act as a drop-in target for existing metrics pipelines. The core database is free, open-source and self-hosted; QuestDB Enterprise adds high availability, replication and role-based security, and a managed QuestDB Cloud service is offered for teams that do not want to operate it themselves. It is frequently evaluated against InfluxDB and TimescaleDB for high-throughput ingestion workloads.
At a glance
| Vendor | QuestDB Technology Inc. |
|---|---|
| Pricing model | Free tier + paid plans |
| Free tier | Yes |
| Deployment | Cloud, Self-hosted |
| Open source | Yes (Apache-2.0) |
| Best for | Teams needing very high write throughput for financial, IoT or metrics time-series data with SQL access. |
Pricing
The open-source core is free; Enterprise and Cloud pricing require contacting sales, with no published rate card.
Checked on the vendor's own page on September 21, 2026: no prices are published. Expect to be quoted.
Features
- High-throughput columnar ingestion
- SQL with SAMPLE BY and ASOF JOIN extensions
- InfluxDB line protocol and Postgres wire protocol support
- SIMD-optimized vectorized query execution
- Out-of-order data ingestion handling
- High availability and RBAC (Enterprise)
Integrations
Profile last reviewed September 21, 2026