Comparison

ClickHouse vs QuestDB

On the evidence we track, ClickHouse leads this comparison with a composite score of 63/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

ClickHouse full profile →QuestDB full profile →

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★ClickHouse63

QuestDB50

Attribute comparison across 2 tools
Attribute	ClickHouseLeader	QuestDB
Vioscale score	63 / 100medium · 60%updating	50 / 100medium · 65%updating
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	commercial
Price levelpricing.price_level	low	low
Transparentpricing.transparent	✓	✗
Integrations
Countintegrations.count	100	10
Security
Disclosure policysecurity.disclosure_policy	✓	-
Gdprsecurity.gdpr	✓	✓
Hipaasecurity.hipaa	✓	-
Iso27001security.iso27001	✓	-
Pcisecurity.pci	✓	-
Scorecardsecurity.scorecard	4.9	4.3
Soc2security.soc2	✓	✓
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2FClickHouse%2FClickHouse&per_page=100 · Last 12m: 0	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.questdb%3Aquestdb&per_page=100 · Last 12m: 0
Reliability
Sla pctreliability.sla_pct	-	99.9
Status pagereliability.status_page	✓	-
Adoption
Dependent reposadoption.dependent_repos	1	106
Github starsadoption.github_stars	49,464	17,279
Activity
Commits last 30dactivity.commits_last_30d	100	64
Release
Cadence daysrelease.cadence_days	-	16
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	Apache-2.0	Apache-2.0
Language
Primarylanguage.primary	C++	Java
Market
Availabilitymarket.availability	Available worldwide	Available worldwide · Popular in GB, US · HQ GB

Score

Vioscale score

ClickHouse63 / 100medium · 60%updating

QuestDB50 / 100medium · 65%updating

Pricing

Free tier

ClickHouse✓

QuestDB✓

Model

ClickHousecommercial

QuestDBcommercial

Price level

ClickHouselow

QuestDBlow

Transparent

ClickHouse✓

QuestDB✗

Integrations

Count

ClickHouse100

QuestDB10

Security

Disclosure policy

ClickHouse✓

QuestDB–

Gdpr

ClickHouse✓

QuestDB✓

Hipaa

ClickHouse✓

QuestDB–

Iso27001

ClickHouse✓

QuestDB–

Pci

ClickHouse✓

QuestDB–

Scorecard

ClickHouse4.9

QuestDB4.3

Soc2

ClickHouse✓

QuestDB✓

Vulnerabilities

ClickHouseCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2FClickHouse%2FClickHouse&per_page=100 · Last 12m: 0

QuestDBCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.questdb%3Aquestdb&per_page=100 · Last 12m: 0

Reliability

Sla pct

ClickHouse–

QuestDB99.9

Status page

ClickHouse✓

QuestDB–

Adoption

Dependent repos

ClickHouse1

QuestDB106

Github stars

ClickHouse49,464

QuestDB17,279

Activity

Commits last 30d

ClickHouse100

QuestDB64

Release

Cadence days

ClickHouse–

QuestDB16

History

ClickHouse20 items

QuestDB20 items

License

Spdx

ClickHouseApache-2.0

QuestDBApache-2.0

Language

Primary

ClickHouseC++

QuestDBJava

Market

Availability

ClickHouseAvailable worldwide

QuestDBAvailable worldwide · Popular in GB, US · HQ GB

Capabilities

Feature-by-feature on the axes that matter for time-series databases. “-” means undocumented, not absent.

Capability comparison for Time-Series Databases
Capability	ClickHouse	QuestDB
Query
Query language (SQL / PromQL / InfluxQL-Flux / Graphite)	SQL	SQL with time-series extensions (SAMPLE BY, ASOF, HORIZON JOIN, N-dimensional ar
SQL compatibility	Full SQL	Full SQL
Ingest
Ingest model	Both	Push
Model
Data model	Both	Wide events
Lifecycle
Downsampling / rollups	-	Continuous aggregates
Retention / TTL	-	-
Storage
Compression (columnar / delta / Gorilla)	columnar	columnar with frame compression
Performance
High-cardinality handling	Strong	Strong
Scale
Clustering / horizontal scale	Distributed / sharded	Distributed / sharded
Replication / HA	✓	✓
Deployment
Deployment	Self-hosted	Self-hosted
Interop
Prometheus remote-write compatible	-	-
Licensing
Licence class	Permissive OSS	Permissive OSS

Query

Query language (SQL / PromQL / InfluxQL-Flux / Graphite)

ClickHouseSQL

QuestDBSQL with time-series extensions (SAMPLE BY, ASOF, HORIZON JOIN, N-dimensional ar

SQL compatibility

ClickHouseFull SQL

QuestDBFull SQL

Ingest

Ingest model

ClickHouseBoth

QuestDBPush

Model

Data model

ClickHouseBoth

QuestDBWide events

Lifecycle

Downsampling / rollups

ClickHouse-

QuestDBContinuous aggregates

Retention / TTL

ClickHouse-

QuestDB-

Storage

Compression (columnar / delta / Gorilla)

ClickHousecolumnar

QuestDBcolumnar with frame compression

Performance

High-cardinality handling

ClickHouseStrong

QuestDBStrong

Scale

Clustering / horizontal scale

ClickHouseDistributed / sharded

QuestDBDistributed / sharded

Replication / HA

ClickHouse✓

QuestDB✓

Deployment

ClickHouseSelf-hosted

QuestDBSelf-hosted

Interop

Prometheus remote-write compatible

ClickHouse-

QuestDB-

Licensing

Licence class

ClickHousePermissive OSS

QuestDBPermissive OSS

What each one is

The product in its own terms, so the numbers below have context.

ClickHouse

Leader

An open-source columnar database system designed to handle large-scale analytical workloads with extremely low latency. Excels at real-time analytics, observability (logs, metrics, traces), data warehousing, and AI/ML applications.

Independently observed

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.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

ClickHouse

Leader

from $0.22/moHybridFree tier30-day trial

From $25.30/TB/mo + $0.2181/compute unit/hr. 30-day free trial.

Basic$25.30/TB/mo + $0.2181/compute unit/hr
- Up to 1 TB storage
- 8-12 GiB total memory
- Backups every 24h, retained for 1 day
- 1 availability zone
- Export backups to own cloud account
- +4 more
Scale$25.30/TB/mo + $0.2985/compute unit/hr
- Unlimited storage
- Configurable memory
- Compute-compute separation
- Configurable backups
- 2+ availability zones
- +5 more
Enterprise$25.30/TB/mo + $0.3903/compute unit/hr
- Everything in Scale plan
- SAML SSO
- Private regions
- Manual vertical scaling for custom profiles
- Enterprise support with 30 min response time for Severity 1 issues
- +6 more

as of 2026-08-01verify ↗

QuestDB

HybridFree tier

Open-source Apache 2.0 free tier; QuestDB Cloud and Enterprise plans available via contact/quote

as of 2026-08-14verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	ClickHouse	QuestDB
WebPlatforms	✓	✓
CLIPlatforms	✗	✓
Cloud / SaaSDeployment	✓	✓
Self-hostedDeployment	✓	✓

Platforms

Web

ClickHouse✓

QuestDB✓

CLI

ClickHouse✗

QuestDB✓

Deployment

Cloud / SaaS

ClickHouse✓

QuestDB✓

Self-hosted

ClickHouse✓

QuestDB✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (2)

PostgreSQL
MySQL

ClickHouse

Leader

6 total - 4 not shared

Amazon S3
Kafka
Airbyte
Vector

Independently observed

QuestDB

10 total - 8 not shared

Parquet
Arrow
Polars
Pandas
Debezium
Iceberg
MongoDB
Cassandra

Independently observed

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.