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ClickHouse vs MonetDB

ClickHouse: Open-source columnar OLAP database known for very fast aggregations over billions of rows. MonetDB: Pioneering open-source column-store from CWI, still a lean research-grade analytical SQL database.

key differences

  • Licensing: ClickHouse is open source (permissive) (Apache License 2.0); MonetDB is open source (copyleft) (Mozilla Public License 2.0).
  • ClickHouse is built for larger datasets (Multi-PB) than MonetDB (≤ 10 TB).
  • Horizontal scaling is native in ClickHouse and manual in MonetDB.
  • Transactions: ClickHouse offers limited ACID; MonetDB offers full.
  • Only ClickHouse has full-text search, vector search, materialized views, ttl / expiry, compression.
  • Only MonetDB has transactions, triggers, stored procedures.
  • ClickHouse has a serverless option; MonetDB does not.

choose clickhouse for

  • +Product and web analytics
  • +Log and observability backends
  • +Real-time dashboards over event streams
  • +Time-series and IoT metrics at scale

best at · Real-time analytics, OLAP, Observability

choose monetdb for

  • +Single-server analytical database
  • +Scientific and research data analysis
  • +Teaching and database research

best at · OLAP, Warehouse, Scientific

ClickHouseOpen-source columnar OLAP database known for very fast aggregations over billions of rows.
MonetDBPioneering open-source column-store from CWI, still a lean research-grade analytical SQL database.
overview
Primary model
Columnar / OLAP
Columnar / OLAP
Also supports
Relational, Document, Vector, Time-Series
Relational, Spatial
Type
Database engine
Database engine
Status
Active
Active
Developer
ClickHouse, Inc.
MonetDB Foundation (CWI spin-off)
First release
2016
2004
Latest version
26.10.2.103 (Oct 24, 2026)
11.55.3 (2026)
License
Open source (permissive)Apache License 2.0
Open source (copyleft)Mozilla Public License 2.0
Free tier
✓
✓
popularity
WhichDB Score
69.8
24.2
Rank
#10
#125
GitHub stars
50.6K
485
Stack Overflow questions
2.2K
447
scale & guarantees
Comfortable data size
Massive (Multi-PB)
Medium (≤ 10 TB)
Horizontal scaling
Native
Manual
Multi-region
Read replicas
None
ACID
Limited
Full
Consistency
Eventual
Strong
Schema
Strict
Strict
Architecture
Distributed, Shared storage, Single node, Client server
Single node, Client server
deployment
Self-hosted
✓
✓
Vendor-managed cloud
✓
—
Serverless
✓
—
Embedded
—
—
Edge
—
—
Clouds
AWS, Google Cloud, Azure, Alibaba Cloud, Tencent Cloud, Aiven
–
capabilities
Transactions
—
✓
Joins
✓
✓
Secondary indexes
✓
✓
Full-text search
✓
—
Vector search
✓
—
Geospatial
✓
✓
JSON
✓
✓
Change data capture
—
—
Triggers
—
✓
Stored procedures
—
✓
Materialized views
✓
—
TTL / expiry
✓
—
Pub/Sub
—
—
Columnar storage
✓
✓
In-memory
—
—
Durable persistence
✓
✓
Compression
✓
—
Encryption at rest
✓
—
Role-based access
✓
✓
Time travel
—
—
Branching
—
—
Online schema changes
✓
—
Streaming ingest
✓
—
Offline sync
—
—
Runs in WebAssembly
—
—
interfaces
Query languages
SQL (ClickHouse dialect), PRQL, KQL (experimental)
SQL, Python UDFs, R UDFs
Client languages
Python, Go, Java, JavaScript, Rust, C++, C#
Python, Java, C, R, JavaScript
Best for
Real-time analytics, OLAP, Observability, Warehouse
OLAP, Warehouse, Scientific
Add more to this comparisonNot sure either fits? Try smart match

ClickHouse vs MonetDB: FAQ

What is the difference between ClickHouse and MonetDB?

ClickHouse: Open-source columnar OLAP database known for very fast aggregations over billions of rows. MonetDB: Pioneering open-source column-store from CWI, still a lean research-grade analytical SQL database. Licensing: ClickHouse is open source (permissive) (Apache License 2.0); MonetDB is open source (copyleft) (Mozilla Public License 2.0). ClickHouse is built for larger datasets (Multi-PB) than MonetDB (≤ 10 TB). Horizontal scaling is native in ClickHouse and manual in MonetDB.

When should I choose ClickHouse over MonetDB?

Choose ClickHouse for product and web analytics; log and observability backends; and real-time dashboards over event streams. Choose MonetDB for single-server analytical database; scientific and research data analysis; and teaching and database research.

Is ClickHouse or MonetDB more popular?

ClickHouse ranks #10 on the WhichDB Score (69.8/100) and MonetDB ranks #125 (24.2/100). Popularity is not fit: check the requirements that matter for your project.

Are ClickHouse and MonetDB open source?

Yes. ClickHouse is open source. License: Apache License 2.0. Yes. MonetDB is open source. License: Mozilla Public License 2.0.