whichdb
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IvorySQL vs Oracle Database

IvorySQL: Apache-licensed PostgreSQL distribution with an Oracle-compatible mode, PL/iSQL and Oracle packages. Oracle Database: The enterprise heavyweight: RAC, Data Guard and a converged engine for SQL, JSON, graph and vectors.

key differences

  • Licensing: IvorySQL is open source (permissive) (Apache License 2.0); Oracle Database is proprietary (Oracle commercial license).
  • Oracle Database is built for larger datasets (≤ 1 PB) than IvorySQL (≤ 10 TB).
  • Only Oracle Database has vector search, columnar storage, in-memory, compression, encryption at rest.

choose ivorysql for

  • +Open-source Oracle-to-PostgreSQL migrations
  • +Running Oracle-style PL/SQL code on Postgres
  • +Teams wanting Oracle syntax without commercial licensing

best at · OLTP, Geo

choose oracle-database for

  • +Core banking and payment systems
  • +Packaged ERP back ends (Oracle E-Business Suite, JD Edwards, PeopleSoft)
  • +Telecom billing and subscriber management
  • +Mixed OLTP plus in-database analytics and vector search

best at · OLTP, HTAP, Warehouse

IvorySQLApache-licensed PostgreSQL distribution with an Oracle-compatible mode, PL/iSQL and Oracle packages.
Oracle DatabaseThe enterprise heavyweight: RAC, Data Guard and a converged engine for SQL, JSON, graph and vectors.
overview
Primary model
Relational
Relational
Also supports
Document, Spatial
Document, Graph, Vector, Spatial, XML
Type
Database engine
Database engine
Status
Active
Active
Developer
IvorySQL community (sponsored by HighGo Software)
Oracle Corporation
First release
2021
1979
Latest version
5.6 (Sep 18, 2026)
23.26.4 (26ai RU) (Oct 2026)
License
Open source (permissive)Apache License 2.0
ProprietaryOracle commercial license
Free tier
✓
✓
popularity
WhichDB Score
5.5
56.9
Rank
#384
#17
GitHub stars
1.1K
–
Stack Overflow questions
–
152.3K
scale & guarantees
Comfortable data size
Medium (≤ 10 TB)
Large (≤ 1 PB)
Horizontal scaling
Addon
Addon
Multi-region
Read replicas
Active active
ACID
Full
Full
Consistency
Strong
Strong
Schema
Strict
Strict
Architecture
Single node, Primary replica, Client server
Client server, Primary replica, Shared storage, Distributed
deployment
Self-hosted
✓
✓
Vendor-managed cloud
—
✓
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
–
Oracle Cloud, AWS, Azure, Google 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, PL/pgSQL, PL/iSQL (Oracle-compatible)
SQL, PL/SQL, SQL/PGQ
Client languages
C, Java, Python, JavaScript, Go, C#
Java, Python, JavaScript, C#, Go, C, C++, PHP
Best for
OLTP, Geo
OLTP, HTAP, Warehouse, Vector search
Add more to this comparisonNot sure either fits? Try smart match

IvorySQL vs Oracle Database: FAQ

What is the difference between IvorySQL and Oracle Database?

IvorySQL: Apache-licensed PostgreSQL distribution with an Oracle-compatible mode, PL/iSQL and Oracle packages. Oracle Database: The enterprise heavyweight: RAC, Data Guard and a converged engine for SQL, JSON, graph and vectors. Licensing: IvorySQL is open source (permissive) (Apache License 2.0); Oracle Database is proprietary (Oracle commercial license). Oracle Database is built for larger datasets (≤ 1 PB) than IvorySQL (≤ 10 TB). Only Oracle Database has vector search, columnar storage, in-memory, compression, encryption at rest.

When should I choose IvorySQL over Oracle Database?

Choose IvorySQL for open-source Oracle-to-PostgreSQL migrations, running Oracle-style PL/SQL code on Postgres and teams wanting Oracle syntax without commercial licensing. Choose Oracle Database for core banking and payment systems; packaged ERP back ends (Oracle E-Business Suite, JD Edwards, PeopleSoft); and telecom billing and subscriber management.

Is IvorySQL or Oracle Database more popular?

Oracle Database ranks #17 on the WhichDB Score (56.9/100) and IvorySQL ranks #384 (5.5/100). Popularity is not fit: check the requirements that matter for your project.

Are IvorySQL and Oracle Database open source?

Yes. IvorySQL is open source. License: Apache License 2.0. No. Oracle Database is proprietary, closed-source software. License: Oracle commercial license.