# ClickHouse vs QuestDB

**Leader by Vioscale score:** ClickHouse

| Attribute | ClickHouse | QuestDB |
|---|---|---|
| **Vioscale score** | 63 (60% (medium)) | 50.3 (65% (medium)) |
| activity.commits_last_30d | 100 | 64 |
| adoption.dependent_repos | 1 | 106 |
| adoption.github_stars | 49,464 | 17,279 |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | 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. | 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. |
| features.capabilities | `{"clustering":"distributed","data_model":"both","deployment":"self_hosted","compression":"columnar","ingest_model":"both","licence_class":"permissive_oss","query_language":"SQL","replication_ha":true,"high_cardinality":"strong","sql_compatibility":"full_sql"}` | `{"clustering":"distributed","data_model":"events","deployment":"self_hosted","compression":"columnar with frame compression","downsampling":"continuous_aggregates","ingest_model":"push","licence_class":"permissive_oss","query_language":"SQL with time-series extensions (SAMPLE BY, ASOF, HORIZON JOIN, N-dimensional ar","replication_ha":true,"high_cardinality":"strong","sql_compatibility":"full_sql"}` |
| integrations.count | 100 | 10 |
| integrations.list | `[{"name":"Amazon S3"},{"name":"Kafka"},{"name":"Airbyte"},{"name":"Vector"},{"name":"PostgreSQL"},{"name":"MySQL"}]` | `[{"name":"PostgreSQL"},{"name":"Parquet"},{"name":"Arrow"},{"name":"Polars"},{"name":"Pandas"},{"name":"Debezium"},{"name":"Iceberg"},{"name":"MySQL"},{"name":"MongoDB"},{"name":"Cassandra"}]` |
| language.primary | C++ | Java |
| license.spdx | Apache-2.0 | Apache-2.0 |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"hqCountry":"GB","primaryMarkets":["GB","US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"web":true}` | `{"cli":true,"web":true}` |
| pricing | `{"type":"hybrid","plans":[{"free":false,"name":"Basic","summary":"$25.30/TB/mo + $0.2181/compute unit/hr","features":["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","Expert support with 1 business day response time","SSO (Google/Microsoft)","Social login","MFA"],"commitment":"monthly","components":[{"per":{"qty":1,"unit":"TB"},"kind":"metered","amount":25.3,"period":"month","currency":"USD"},{"per":{"qty":1,"unit":"compute_unit"},"kind":"metered","amount":0.2181,"period":"hour","currency":"USD"}],"description":"Great for testing out new ideas or starter projects. Limited storage and memory.","contactSales":false,"includedLimits":{"memory":"8-12 GiB","storage":"1 TB","backup_retention":"1 day","availability_zones":"1"}},{"free":false,"name":"Scale","summary":"$25.30/TB/mo + $0.2985/compute unit/hr","features":["Unlimited storage","Configurable memory","Compute-compute separation","Configurable backups","2+ availability zones","Expert support with 1 hour response time, 24x7 for Severity 1 issues","S3 role-based access","Private networking","Automatic vertical scaling","Manual horizontal scaling"],"commitment":"monthly","components":[{"per":{"qty":1,"unit":"TB"},"kind":"metered","amount":25.3,"period":"month","currency":"USD"},{"per":{"qty":1,"unit":"compute_unit"},"kind":"metered","amount":0.2985,"period":"hour","currency":"USD"}],"description":"For production environments, data at scale, or professional use cases.","contactSales":false,"includedLimits":{"memory":"Configurable","storage":"Unlimited","backup_retention":"1 day","availability_zones":"2+"}},{"free":false,"name":"Enterprise","summary":"$25.30/TB/mo + $0.3903/compute unit/hr","features":["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","Named Lead Support Engineer","Transparent data encryption / CMEK","Scheduled upgrades","Consultative migration guides","HIPAA compliance","PCI compliance"],"commitment":"monthly","components":[{"per":{"qty":1,"unit":"TB"},"kind":"metered","amount":25.3,"period":"month","currency":"USD"},{"per":{"qty":1,"unit":"compute_unit"},"kind":"metered","amount":0.3903,"period":"hour","currency":"USD"}],"description":"For production environments, very large data at scale, or enterprise use cases.","contactSales":false}],"addOns":[{"name":"Data transfer – public internet egress","components":[{"per":{"qty":1,"unit":"GB"},"kind":"metered","amount":0.1152,"period":"month","currency":"USD"}]},{"name":"Data transfer – inter-region egress","components":[{"per":{"qty":1,"unit":"GB"},"kind":"metered","amount":0.0312,"period":"month","currency":"USD"}]},{"name":"ClickPipes data ingestion","components":[{"per":{"qty":1,"unit":"GB"},"kind":"metered","amount":0.04,"period":"ingestion","currency":"USD"},{"per":{"qty":1,"unit":"compute_unit"},"kind":"metered","amount":0.2,"period":"hour","currency":"USD"}]}],"summary":"From $25.30/TB/mo + $0.2181/compute unit/hr. 30-day free trial.","currency":"USD","freeTier":true,"sourceUrl":"https://clickhouse.com","retrievedAt":"2026-08-01T15:34:36.304Z","freeTrialDays":30,"startingPrice":{"amount":0.2181,"period":"month","currency":"USD"},"billingPeriods":["month"]}` | `{"type":"hybrid","summary":"Open-source Apache 2.0 free tier; QuestDB Cloud and Enterprise plans available via contact/quote","freeTier":true,"sourceUrl":"https://questdb.com/glossary/black-scholes-model-for-option-pricing/","retrievedAt":"2026-08-14T16:37:07.614Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | commercial |
| pricing.price_level | low | low |
| pricing.transparent | yes | no |
| release.cadence_days | - | 16 |
| release.history | `[{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.3.23.7-lts","date":"2026-08-26T13:37:31Z","type":"stable","version":"v26.3.23.7-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v25.8.33.6-lts","date":"2026-08-26T12:30:29Z","type":"stable","version":"v25.8.33.6-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.3.22.7-lts","date":"2026-08-25T12:26:14Z","type":"stable","version":"v26.3.22.7-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.3.21.7-lts","date":"2026-08-22T12:27:45Z","type":"stable","version":"v26.3.21.7-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.7.5.10-stable","date":"2026-08-21T13:49:49Z","type":"stable","version":"v26.7.5.10-stable"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v25.8.32.4-lts","date":"2026-08-21T12:22:30Z","type":"stable","version":"v25.8.32.4-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.3.20.7-lts","date":"2026-08-20T13:37:17Z","type":"stable","version":"v26.3.20.7-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v25.8.31.9-lts","date":"2026-08-20T12:28:36Z","type":"stable","version":"v25.8.31.9-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.7.4.58-stable","date":"2026-08-19T07:27:39Z","type":"stable","version":"v26.7.4.58-stable"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.6.3.62-stable","date":"2026-08-19T09:48:18Z","type":"stable","version":"v26.6.3.62-stable"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.5.7.64-stable","date":"2026-08-19T08:34:38Z","type":"stable","version":"v26.5.7.64-stable"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.3.19.3-lts","date":"2026-08-18T12:26:25Z","type":"stable","version":"v26.3.19.3-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.3.18.32-lts","date":"2026-08-17T11:58:16Z","type":"stable","version":"v26.3.18.32-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v25.8.30.16-lts","date":"2026-08-17T10:51:53Z","type":"stable","version":"v25.8.30.16-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.7.3.19-stable","date":"2026-08-06T07:18:47Z","type":"stable","version":"v26.7.3.19-stable"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.6.2.160-stable","date":"2026-08-05T10:04:32Z","type":"stable","version":"v26.6.2.160-stable"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.3.17.110-lts","date":"2026-08-05T06:37:56Z","type":"stable","version":"v26.3.17.110-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v25.8.29.51-lts","date":"2026-08-05T08:48:10Z","type":"stable","version":"v25.8.29.51-lts"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.6.2.158-stable","date":"2026-08-04T15:14:23Z","type":"stable","version":"v26.6.2.158-stable"},{"url":"https://github.com/ClickHouse/ClickHouse/releases/tag/v26.5.6.113-stable","date":"2026-08-04T06:36:54Z","type":"stable","version":"v26.5.6.113-stable"}]` | `[{"url":"https://github.com/questdb/questdb/releases/tag/10.0.1","date":"2026-08-24T13:55:02Z","type":"stable","version":"10.0.1"},{"url":"https://github.com/questdb/questdb/releases/tag/10.0.0","date":"2026-08-06T15:36:51Z","type":"stable","version":"10.0.0"},{"url":"https://github.com/questdb/questdb/releases/tag/9.4.3","date":"2026-06-15T17:01:58Z","type":"stable","version":"9.4.3"},{"url":"https://github.com/questdb/questdb/releases/tag/9.4.2","date":"2026-06-09T13:30:03Z","type":"stable","version":"9.4.2"},{"url":"https://github.com/questdb/questdb/releases/tag/9.4.1","date":"2026-06-03T08:03:25Z","type":"stable","version":"9.4.1"},{"url":"https://github.com/questdb/questdb/releases/tag/9.4.0","date":"2026-05-18T12:56:56Z","type":"stable","version":"9.4.0"},{"url":"https://github.com/questdb/questdb/releases/tag/9.3.5","date":"2026-04-13T17:21:09Z","type":"stable","version":"9.3.5"},{"url":"https://github.com/questdb/questdb/releases/tag/9.3.4","date":"2026-03-26T16:16:42Z","type":"stable","version":"9.3.4"},{"url":"https://github.com/questdb/questdb/releases/tag/9.3.3","date":"2026-02-25T14:23:44Z","type":"stable","version":"9.3.3"},{"url":"https://github.com/questdb/questdb/releases/tag/9.3.2","date":"2026-01-28T15:23:29Z","type":"stable","version":"9.3.2"},{"url":"https://github.com/questdb/questdb/releases/tag/9.3.1","date":"2026-01-14T16:41:31Z","type":"stable","version":"9.3.1"},{"url":"https://github.com/questdb/questdb/releases/tag/9.3.0","date":"2026-01-09T13:08:40Z","type":"stable","version":"9.3.0"},{"url":"https://github.com/questdb/questdb/releases/tag/9.2.3","date":"2025-12-18T12:13:27Z","type":"stable","version":"9.2.3"},{"url":"https://github.com/questdb/questdb/releases/tag/9.2.2","date":"2025-12-01T12:48:30Z","type":"stable","version":"9.2.2"},{"url":"https://github.com/questdb/questdb/releases/tag/9.2.1","date":"2025-11-25T14:38:23Z","type":"stable","version":"9.2.1"},{"url":"https://github.com/questdb/questdb/releases/tag/9.2.0","date":"2025-11-13T16:13:27Z","type":"stable","version":"9.2.0"},{"url":"https://github.com/questdb/questdb/releases/tag/9.1.1","date":"2025-11-03T15:25:09Z","type":"stable","version":"9.1.1"},{"url":"https://github.com/questdb/questdb/releases/tag/9.1.0","date":"2025-10-03T13:54:02Z","type":"stable","version":"9.1.0"},{"url":"https://github.com/questdb/questdb/releases/tag/9.0.3","date":"2025-08-29T18:32:12Z","type":"stable","version":"9.0.3"},{"url":"https://github.com/questdb/questdb/releases/tag/9.0.2","date":"2025-08-15T16:34:55Z","type":"stable","version":"9.0.2"}]` |
| reliability.sla_pct | - | 99.9 |
| reliability.status_page | yes | - |
| security.disclosure_policy | yes | - |
| security.gdpr | yes | yes |
| security.hipaa | yes | - |
| security.iso27001 | yes | - |
| security.pci | yes | - |
| security.scorecard | 4.9 | 4.3 |
| security.soc2 | yes | yes |
| security.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,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.questdb%3Aquestdb&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (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 |

*Source: Vioscale. Generated 2026-09-01T14:59:11.560Z. "-" = undocumented, not absent.*