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OceanBase vs Alibaba PolarDB

OceanBase: Alipay-proven distributed SQL with MySQL (and Oracle, in Enterprise) compatibility, HTAP and vector search. Alibaba PolarDB: Alibaba Cloud's shared-storage relational service in MySQL-, PostgreSQL- and Oracle-compatible editions.

key differences

  • Licensing: OceanBase is open source (permissive) (Apache License 2.0 (Community Edition)); Alibaba PolarDB is proprietary (Proprietary (Alibaba Cloud service)).
  • OceanBase is built for larger datasets (Multi-PB) than Alibaba PolarDB (≤ 1 PB).
  • Horizontal scaling is native in OceanBase and addon in Alibaba PolarDB.
  • Only Alibaba PolarDB has in-memory.
  • Alibaba PolarDB has a serverless option; OceanBase does not.

choose oceanbase for

  • +Core banking and payment systems
  • +Oracle-to-distributed-SQL migrations
  • +Consolidating many MySQL instances into one multi-tenant cluster
  • +HTAP reporting on live order data

best at · OLTP, HTAP, Real-time analytics

choose polardb for

  • +E-commerce and gaming backends on Alibaba Cloud
  • +Oracle migrations in Chinese enterprises
  • +Read-heavy apps needing fast replica scaling
  • +HTAP reporting with IMCI

best at · OLTP, HTAP, Real-time analytics

OceanBaseAlipay-proven distributed SQL with MySQL (and Oracle, in Enterprise) compatibility, HTAP and vector search.
Alibaba PolarDBAlibaba Cloud's shared-storage relational service in MySQL-, PostgreSQL- and Oracle-compatible editions.
overview
Primary model
Relational
Relational
Also supports
Document, Columnar / OLAP, Vector, Spatial
Document, Spatial, Columnar / OLAP, Vector
Type
Database engine
Managed service
Status
Active
Active
Developer
OceanBase (Ant Group)
Alibaba Cloud
First release
2010
2017
Latest version
5.0.1 CE (Aug 6, 2026)
–
License
Open source (permissive)Apache License 2.0 (Community Edition)
ProprietaryProprietary (Alibaba Cloud service)
Free tier
✓
—
popularity
WhichDB Score
19.4
2.7
Rank
#168
#461
GitHub stars
10.4K
–
Stack Overflow questions
20
61
scale & guarantees
Comfortable data size
Massive (Multi-PB)
Large (≤ 1 PB)
Horizontal scaling
Native
Addon
Multi-region
Active active
Read replicas
ACID
Full
Full
Consistency
Strong
Strong
Schema
Strict
Strict
Architecture
Distributed, Client server, Single node
Shared storage, Primary replica, Serverless
deployment
Self-hosted
✓
—
Vendor-managed cloud
✓
✓
Serverless
—
✓
Embedded
—
—
Edge
—
—
Clouds
AWS, Google Cloud, Azure, Alibaba Cloud, Huawei Cloud, Tencent 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, PL/SQL (Enterprise Oracle mode)
SQL, PL/pgSQL, PL/SQL (Oracle-compatible edition)
Client languages
Java, Python, Go, C, JavaScript, C#
Java, Python, Go, PHP, JavaScript, C#
Best for
OLTP, HTAP, Real-time analytics, Vector search
OLTP, HTAP, Real-time analytics, Geo
Add more to this comparisonNot sure either fits? Try smart match

OceanBase vs Alibaba PolarDB: FAQ

What is the difference between OceanBase and Alibaba PolarDB?

OceanBase: Alipay-proven distributed SQL with MySQL (and Oracle, in Enterprise) compatibility, HTAP and vector search. Alibaba PolarDB: Alibaba Cloud's shared-storage relational service in MySQL-, PostgreSQL- and Oracle-compatible editions. Licensing: OceanBase is open source (permissive) (Apache License 2.0 (Community Edition)); Alibaba PolarDB is proprietary (Proprietary (Alibaba Cloud service)). OceanBase is built for larger datasets (Multi-PB) than Alibaba PolarDB (≤ 1 PB). Horizontal scaling is native in OceanBase and addon in Alibaba PolarDB.

When should I choose OceanBase over Alibaba PolarDB?

Choose OceanBase for core banking and payment systems; oracle-to-distributed-SQL migrations; and consolidating many MySQL instances into one multi-tenant cluster. Choose Alibaba PolarDB for E-commerce and gaming backends on Alibaba Cloud; oracle migrations in Chinese enterprises; and read-heavy apps needing fast replica scaling.

Is OceanBase or Alibaba PolarDB more popular?

OceanBase ranks #168 on the WhichDB Score (19.4/100) and Alibaba PolarDB ranks #461 (2.7/100). Popularity is not fit: check the requirements that matter for your project.

Are OceanBase and Alibaba PolarDB open source?

Yes. OceanBase is open source. License: Apache License 2.0 (Community Edition). No. Alibaba PolarDB is proprietary, closed-source software.