QuestDB
A fast, open-source database optimized for high-volume time-series data with millisecond query performance
- Also known as
- questdb
Available worldwide · Popular in: GB, US
What is QuestDB?
QuestDB is an open-source time-series database engineered for low latency, delivering ultra-low latency ingestion, high throughput, and multi-tier storage for demanding time-series workloads.
QuestDB pricing
We don't have QuestDB's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
Open-source Apache 2.0 free tier; QuestDB Cloud and Enterprise plans available via contact/quote
What QuestDB does
The capabilities that matter for time-series databases, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Query language (SQL / PromQL / InfluxQL-Flux / Graphite)
- SQL with time-series extensions (SAMPLE BY, ASOF, HORIZON JOIN, N-dimensional ar
- SQL compatibility
- Full SQL
- Ingest model
- Push
- Data model
- Wide events
- Downsampling / rollups
- Continuous aggregates
- Retention / TTL
- -
- Compression (columnar / delta / Gorilla)
- columnar with frame compression
- High-cardinality handling
- Strong
- Clustering / horizontal scale
- Distributed / sharded
- Replication / HA
- ✓
- Deployment
- Self-hosted
- Prometheus remote-write compatible
- -
- Licence class
- Permissive OSS
Platform & deployment
Independently observed- CLI
- macOS
- Web
- Linux
- Windows
- Cloud / SaaS
- Self-hosted
Integrations (15)
Independently observed- PostgreSQL
- Parquet
- Arrow
- Polars
- Pandas
- Debezium
- Iceberg
- MySQL
- MongoDB
- Cassandra
- Kafka←•
- Apache Parquet⇄•
- Apache Arrow⇄•
- Claude Code⇄•
- REST API⇄•
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
QuestDB FAQ
Common questions about QuestDB, answered from independent, dated evidence.
What is QuestDB?
QuestDB is an open-source time-series database engineered for low latency, delivering ultra-low latency ingestion, high throughput, and multi-tier storage for demanding time-series workloads. It is indexed under Time-Series Databases.
Source: https://questdb.io
Is QuestDB free?
QuestDB offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.
Source: https://questdb.com/glossary/black-scholes-model-for-option-pricing/
What platforms does QuestDB support?
QuestDB supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://questdb.com/glossary/black-scholes-model-for-option-pricing/
Can QuestDB be self-hosted?
Yes. QuestDB can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://questdb.com/glossary/black-scholes-model-for-option-pricing/
What does QuestDB integrate with?
We have confirmed 10 integrations for QuestDB, including PostgreSQL, Parquet, Arrow, Polars, Pandas, Debezium, Iceberg and MySQL, plus 2 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.
Source: https://questdb.com/glossary/black-scholes-model-for-option-pricing/
What security certifications does QuestDB have?
We have independently confirmed SOC 2 and GDPR for QuestDB. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as QuestDB not holding them. Always confirm compliance directly before you rely on it.
Source: https://questdb.io
Is QuestDB open source?
Yes. QuestDB is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Where is QuestDB available?
QuestDB is available worldwide. Its primary markets are the United Kingdom and the United States. The vendor is headquartered in the United Kingdom.
Source: https://questdb.com/glossary/black-scholes-model-for-option-pricing/
QuestDB alternatives
Other time-series databases we track, ranked by the same independent score.
- PrometheusOpen-source metrics and time-series monitoring solution for systems and applicationsmedium · 58%
- ClickHouseA high-performance, column-oriented database optimized for real-time analytics at petabyte scalemedium · 61%
- InfluxDBA time-series database engineered for real-time ingestion and analysis of high-velocity operational datamedium · 70%
- TDengineTime-series database for billions of connected sensorsmedium · 68%
- TimescaleDBPostgreSQL-based time-series database system designed to store and query petabyte-scale sensor and machine data efficientlymedium · 63%
- Amazon Timestreammedium · 61%
Compare QuestDB
Side by side against other time-series databases, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for QuestDB, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Development activity | 57 | 0.14 | 7.6 | ✓ |
| Release cadence | 91 | 0.08 | 7.4 | ✓ |
| Security posture | 45 | 0.12 | 5.5 | ✓ |
| Stars | 80 | 0.05 | 3.8 | ✓ |
| Security score | 44 | 0.05 | 2.4 | ✓ |
| Capabilities | 29 | 0.08 | 2.3 | ✓ |
| Dependent projects | 34 | 0.05 | 1.8 | ✓ |
| Integrations | 26 | 0.05 | 1.4 | ✓ |
| Package downloads | 0 | 0.04 | 0.0 | - |
| Developer Q&A activity | 0 | 0.14 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 62 | mediumsource · 2026-09-11 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 8 items | mediumsource · 2026-09-10 · 65% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Clustering: distributed · Data model: events · Deployment: self_hosted · Compression: columnar with frame compression · Downsampling: continuous_aggregates · Ingest model: push | mediumsource · 2026-09-14 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 7 | mediumsource · 2026-09-14 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Java | highsource · 2026-09-11 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | Apache-2.0 | highsource · 2026-09-11 · 95% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | HqCountry: GB · PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-08-14 · 75% |
Pricing
Release
Reliability
| Attribute | Value | Evidence |
|---|---|---|
| Sla pct | 99.9 | mediumsource · 2026-09-14 · 60% |
Security
| Attribute | Value | Evidence |
|---|---|---|
| Soc2 | Yes | lowsource · 2026-09-11 · 48% |
| Gdpr | Yes | highsource · 2026-09-14 · 75% |
| Scorecard | 4.4 | highsource · 2026-09-11 · 90% |
| Vulnerabilities | Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.questdb%3Aquestdb&per_page=100 · Last 12m: 0 | highsource · 2026-09-11 · 90% |
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