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Apache ShardingSphere vs PolarDB-X

Apache ShardingSphere: Apache sharding middleware that adds sharding, read/write splitting and encryption over MySQL or Postgres. PolarDB-X: Alibaba's open-source, MySQL-compatible shared-nothing distributed SQL with Paxos and columnar indexes.

key differences

  • Horizontal scaling is addon in Apache ShardingSphere and native in PolarDB-X.
  • Transactions: Apache ShardingSphere offers limited ACID; PolarDB-X offers full.
  • Only PolarDB-X has json, stored procedures, ttl / expiry, columnar storage, compression.
  • Apache ShardingSphere can run embedded in your application process.

choose apache-shardingsphere for

  • +Scaling Java/Spring applications on sharded MySQL
  • +Transparent column encryption and data masking
  • +Read/write splitting across replicas
  • +Shadow databases for production load testing

best at · OLTP

choose polardb-x for

  • +Scaling large MySQL e-commerce databases
  • +High-concurrency order and payment systems
  • +Consolidating sharded MySQL into one logical database
  • +Operational analytics via columnar indexes

best at · OLTP, HTAP, Real-time analytics

Apache ShardingSphereApache sharding middleware that adds sharding, read/write splitting and encryption over MySQL or Postgres.
PolarDB-XAlibaba's open-source, MySQL-compatible shared-nothing distributed SQL with Paxos and columnar indexes.
overview
Primary model
Relational
Relational
Also supports
–
Document, Columnar / OLAP
Type
Database engine
Database engine
Status
Active
Active
Developer
Apache Software Foundation
Alibaba Cloud
First release
2016
2021
Latest version
5.5.3 (Feb 28, 2026)
5.4.21 (Sep 20, 2026)
License
Open source (permissive)Apache License 2.0
Open source (permissive)Apache License 2.0
Free tier
✓
—
popularity
WhichDB Score
9.5
5.0
Rank
#308
#391
GitHub stars
20.8K
1.7K
Stack Overflow questions
7
–
scale & guarantees
Comfortable data size
Large (≤ 1 PB)
Large (≤ 1 PB)
Horizontal scaling
Addon
Native
Multi-region
None
Read replicas
ACID
Limited
Full
Consistency
Strong, Eventual
Strong
Schema
Strict
Strict
Architecture
Distributed, Client server, Embedded
Distributed, Client server
deployment
Self-hosted
✓
✓
Vendor-managed cloud
—
✓
Serverless
—
—
Embedded
✓
—
Edge
—
—
Clouds
–
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, DistSQL
SQL
Client languages
Java
Java, Python, Go, PHP, JavaScript
Best for
OLTP
OLTP, HTAP, Real-time analytics
Add more to this comparisonNot sure either fits? Try smart match

Apache ShardingSphere vs PolarDB-X: FAQ

What is the difference between Apache ShardingSphere and PolarDB-X?

Apache ShardingSphere: Apache sharding middleware that adds sharding, read/write splitting and encryption over MySQL or Postgres. PolarDB-X: Alibaba's open-source, MySQL-compatible shared-nothing distributed SQL with Paxos and columnar indexes. Horizontal scaling is addon in Apache ShardingSphere and native in PolarDB-X. Transactions: Apache ShardingSphere offers limited ACID; PolarDB-X offers full. Only PolarDB-X has json, stored procedures, ttl / expiry, columnar storage, compression.

When should I choose Apache ShardingSphere over PolarDB-X?

Choose Apache ShardingSphere for scaling Java/Spring applications on sharded MySQL; transparent column encryption and data masking; and read/write splitting across replicas. Choose PolarDB-X for scaling large MySQL e-commerce databases; high-concurrency order and payment systems; and consolidating sharded MySQL into one logical database.

Is Apache ShardingSphere or PolarDB-X more popular?

Apache ShardingSphere ranks #308 on the WhichDB Score (9.5/100) and PolarDB-X ranks #391 (5.0/100). Popularity is not fit: check the requirements that matter for your project.

Are Apache ShardingSphere and PolarDB-X open source?

Yes. Apache ShardingSphere is open source. License: Apache License 2.0. Yes. PolarDB-X is open source. License: Apache License 2.0.