QuestDB
A fast time-series database using open data formats for analytics and event processing
- Also known as
- questdb
Available worldwide · Popular in: GB, US
What is QuestDB?
A specialized database engineered to ingest high-volume time-series data at speed, execute queries with minimal latency, and maintain queryable history across tiered storage layers—combining standard SQL with open file formats for portability.
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
- Automatic
- 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
- Hybrid
- Self-hosted
Integrations (19)
Independently observed- Databricks
- AWS
- Azure
- PostgreSQL
- Parquet
- Arrow
- Polars
- Pandas
- Debezium
- Iceberg
- MySQL
- MongoDB
- Cassandra
- Kafka←•
- Apache Parquet⇄•
- Apache Arrow⇄•
- Claude Code⇄•
- REST API⇄•
- Apache Iceberg•
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.
- PrometheusAn open-source monitoring system that collects metrics from applications and infrastructure via scraping, storing them as a time-series database for querying anmedium · 57%
- ClickHouseHigh-performance, open-source database designed for fast analytical queries at scalemedium · 60%
- InfluxDBA distributed database purpose-built for rapidly collecting and querying time-stamped observability data at scalemedium · 68%
- TimescaleDBA PostgreSQL extension for scaling time-series and operational data workloads to petabyte volumesmedium · 62%
- TDengineAI-powered time-series database for industrial IoT and sensor data managementmedium · 71%
- M3DBOpen-source distributed database for collecting and querying time series metrics at scalemedium · 51%
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 |
|---|---|---|---|---|
| Release cadence | 91 | 0.08 | 7.4 | ✓ |
| Development activity | 50 | 0.14 | 6.8 | ✓ |
| 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 | 38 | mediumsource · 2026-10-15 · 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 · 2026-10-15 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 7 | mediumsource · 2026-10-15 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Java | highsource · 2026-10-15 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | Apache-2.0 | highsource · 2026-10-15 · 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 · 2026-10-15 · 60% |
Security
| Attribute | Value | Evidence |
|---|---|---|
| Soc2 | Yes | lowsource · 2026-10-15 · 48% |
| Gdpr | Yes | highsource · 2026-09-14 · 75% |
| Scorecard | 4.4 | highsource · 2026-10-15 · 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 · 2026-10-15 · 90% |
Is QuestDB the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank QuestDB against the rest of the time-series databases we index, using the same dated evidence weighted your way.
Free to run, no account needed to start. How the evaluation works
Is this your product?
This profile was built from public sources without asking you. You can take the badge below and use it anywhere, and you can claim the profile to correct anything we got wrong. Both are free, and neither moves QuestDB up or down: nobody can buy rank here, including you.
Take the badge
Live, always current, and free to use on your own site. It shows QuestDB's independent score and links back to this profile.
<a href="https://www.vioscale.ai/software/questdb" target="_blank" rel="noopener">
<img src="https://www.vioscale.ai/badge/software/questdb.svg" alt="QuestDB, verified on vioscaleAI" width="330" height="76" loading="lazy" />
</a>Markdown, for a README →
[](https://www.vioscale.ai/software/questdb)Claim the profile
Verify you control the domain, then point us at the pages that state the facts about QuestDB and add your own description and media. Free, and it does not change the score.
- Correct anything wrong, with evidence
- Point our crawler at the pages that matter
- Write your own description and add media
Not the owner? How vendor profiles work