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MonetDB vs PostgreSQL

MonetDB: Pioneering open-source column-store from CWI, still a lean research-grade analytical SQL database. PostgreSQL: The extensible, standards-first open-source relational database.

key differences

  • MonetDB is primarily a columnar / OLAP database; PostgreSQL is relational.
  • Licensing: MonetDB is open source (copyleft) (Mozilla Public License 2.0); PostgreSQL is open source (permissive) (PostgreSQL License).
  • Horizontal scaling is manual in MonetDB and addon in PostgreSQL.
  • Only MonetDB has columnar storage.
  • Only PostgreSQL has full-text search, vector search, change data capture, materialized views, pub/sub.

choose monetdb for

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

best at · OLAP, Warehouse, Scientific

choose postgresql for

  • +General-purpose application backend
  • +SaaS multi-tenant data
  • +Geospatial applications with PostGIS
  • +Semantic search alongside relational data with pgvector

best at · OLTP, Geo, Search

MonetDBPioneering open-source column-store from CWI, still a lean research-grade analytical SQL database.
PostgreSQLThe extensible, standards-first open-source relational database.
overview
Primary model
Columnar / OLAP
Relational
Also supports
Relational, Spatial
Document, Spatial
Type
Database engine
Database engine
Status
Active
Active
Developer
MonetDB Foundation (CWI spin-off)
PostgreSQL Global Development Group
First release
2004
1996
Latest version
11.55.3 (2026)
18.6 (Aug 13, 2026)
License
Open source (copyleft)Mozilla Public License 2.0
Open source (permissive)PostgreSQL License
Free tier
✓
✓
popularity
WhichDB Score
24.2
93.2
Rank
#125
#1
GitHub stars
485
22.6K
Stack Overflow questions
447
178.8K
scale & guarantees
Comfortable data size
Medium (≤ 10 TB)
Medium (≤ 10 TB)
Horizontal scaling
Manual
Addon
Multi-region
None
Read replicas
ACID
Full
Full
Consistency
Strong
Strong
Schema
Strict
Strict
Architecture
Single node, Client server
Single node, Primary replica, Client server
deployment
Self-hosted
✓
✓
Vendor-managed cloud
—
—
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
–
AWS, Google Cloud, Azure, Oracle Cloud, IBM Cloud, Alibaba Cloud
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, Python UDFs, R UDFs
SQL, PL/pgSQL
Client languages
Python, Java, C, R, JavaScript
C, Java, Python, JavaScript, Go, Rust, C#, Ruby
Best for
OLAP, Warehouse, Scientific
OLTP, Geo, Search, Content
Add more to this comparisonNot sure either fits? Try smart match

MonetDB vs PostgreSQL: FAQ

What is the difference between MonetDB and PostgreSQL?

MonetDB: Pioneering open-source column-store from CWI, still a lean research-grade analytical SQL database. PostgreSQL: The extensible, standards-first open-source relational database. MonetDB is primarily a columnar / OLAP database; PostgreSQL is relational. Licensing: MonetDB is open source (copyleft) (Mozilla Public License 2.0); PostgreSQL is open source (permissive) (PostgreSQL License). Horizontal scaling is manual in MonetDB and addon in PostgreSQL.

When should I choose MonetDB over PostgreSQL?

Choose MonetDB for single-server analytical database; scientific and research data analysis; and teaching and database research. Choose PostgreSQL for general-purpose application backend, SaaS multi-tenant data and geospatial applications with PostGIS.

Is MonetDB or PostgreSQL more popular?

PostgreSQL ranks #1 on the WhichDB Score (93.2/100) and MonetDB ranks #125 (24.2/100). Popularity is not fit: check the requirements that matter for your project.

Are MonetDB and PostgreSQL open source?

Yes. MonetDB is open source. License: Mozilla Public License 2.0. Yes. PostgreSQL is open source. License: PostgreSQL License.