QuestDB
Low-latency time-series database on open formats
- Also known as
- questdb
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 is free; QuestDB Enterprise available by contact
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
- SQL compatibility
- Full SQL
- Ingest model
- Both
- Data model
- Wide events
- Downsampling / rollups
- Continuous aggregates
- Retention / TTL
- -
- Compression (columnar / delta / Gorilla)
- columnar with Parquet support
- 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- Web
- Cloud / SaaS
- Hybrid
- On-premise
- Self-hosted
QuestDB alternatives
Other time-series databases we track, ranked by the same independent score.
- PrometheusMonitor your applications, systems, and services with the leading open source monitoring solution.low · 32%
- TDengineFree forever for up to 5,000 tags, with annual and perpetual licenses for larger deploymentslow · 41%
- GreptimeDBThe Single Database for Observabilitylow · 30%
- PrometheusMonitor your applications, systems, and services with the leading open source monitoring solution.low · 36%
- TimescaleDBTime-Series PostgreSQL at Petabyte Scalelow · 46%
- ClickHouseThe leading database for AIlow · 24%
The Vioscale 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 | 90 | 12.00 | 1080.0 | ✓ |
| Github Activity | 52 | 20.00 | 1040.9 | ✓ |
| Security Posture | 40 | 18.00 | 720.0 | ✓ |
| Github Stars | 80 | 7.00 | 559.4 | ✓ |
| Capabilities | 29 | 17.00 | 491.4 | ✓ |
| Price Level | 80 | 6.00 | 480.0 | ✓ |
| Reliability | 45 | 10.00 | 450.0 | ✓ |
| Pricing Transparency | 25 | 8.00 | 200.0 | ✓ |
| Integrations | 0 | 8.00 | 0.0 | - |
| Package Downloads | 0 | 6.00 | 0.0 | - |
| Stackoverflow Activity | 0 | 20.00 | 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 | 44 | mediumsource · 2026-08-01 · 65% |
Adoption
| Attribute | Value | Evidence |
|---|---|---|
| Github stars | 17,221 | highsource · 2026-08-01 · 90% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | {"clustering":"distributed","data_model":"events","deployment":"self_hosted","compression":"columnar with Parquet support","downsampling":"continuous_aggregates","ingest_model":"both","licence_class":"permissive_oss","query_language":"SQL","replication_ha":true,"high_cardinality":"strong","sql_compatibility":"full_sql"} | mediumsource · 2026-08-01 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Java | highsource · 2026-08-01 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | Apache-2.0 | highsource · 2026-08-01 · 95% |
Pricing
Release
| Attribute | Value | Evidence |
|---|---|---|
| Cadence days | 18 | mediumsource · 2026-08-01 · 70% |
Reliability
| Attribute | Value | Evidence |
|---|---|---|
| Sla pct | 99.9 | mediumsource · 2026-08-01 · 60% |
Security
| Attribute | Value | Evidence |
|---|---|---|
| Soc2 | Yes | lowsource · 2026-08-01 · 48% |