YDB vs PolarDB-X

YYDB8.6Visit PolarDB-X8.5Visit

Higher score Y YDB #6 in Distributed SQL Databases 8.6/10 Open source ✓ 3 of 6 features Visit YDB

vs

PolarDB-X #7 in Distributed SQL Databases 8.5/10 Paid ✓ 4 of 6 features Visit PolarDB-X

• YDB fits best

  Open-source distributed transactional systems

• PolarDB-X fits best

  MySQL-compatible distributed HTAP

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Side by side

Feature	YYDB 8.6/10 Visit ↗	PolarDB-X 8.5/10 Visit ↗
At a glance
Editor score	8.6	8.5
Ranking	#6 in Distributed SQL Databases	#7 in Distributed SQL Databases
Best for	Open-source distributed transactional systems	MySQL-compatible distributed HTAP
Pricing model	Free	Paid
Starting price	Free	—
Free plan	Not checked yet	Not checked yet
Free trial	—	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Linux	Web
Support	Community, Docs	Docs
Integrations	9 integrations	3 integrations
Built for	Small business, Mid-market, Enterprise	Mid-market, Enterprise
Features YDB 3/6 · PolarDB-X 4/6
PostgreSQL compatibility	Not checked yet	Not checked yet
MySQL compatibility	Not checked yet	✓ (best)
Horizontal scaling	✓	✓
Multi-region deployment	✓	✓
Geo-partitioning	Not checked yet	Not checked yet
HTAP workloads	✓	✓
Specs
Deployment model	Both	Both
Our review
Pros	Distributed ACID transactions with automatic sharding and rebalancing Supports multi-data-center replication and fault-tolerant topologies Combines SQL, streaming, federated queries, and external integrations	Transparent distribution with automatic partition rebalancing Strongly consistent transactions with Paxos high availability HTAP support with column-store nodes and global secondary indexes
Cons	Managed charges vary by usage, region, and dedicated resources Change data capture is specified for row-oriented tables Its broad feature set may exceed the needs of narrow database projects	Pricing varies by region, instance type, storage, and billing method Advanced distributed architecture may exceed simpler database needs Some ecosystem integrations are centered on Alibaba Cloud services
Our verdict	YDB is an Apache 2.0 open-source distributed SQL database for mission-critical transactional, analytical, and streaming workloads. It is aimed at teams that need strongly consistent ACID transactions, horizontal scaling, automatic… Read the review →	PolarDB-X is Alibaba Cloud’s distributed relational database for applications with high concurrency, large tables, and growing storage requirements. It suits teams that want MySQL-compatible SQL syntax and ecosystem integration while… Read the review →

Strengths and trade-offs

• YDB — where it wins

  • Distributed ACID transactions with automatic sharding and rebalancing
  • Supports multi-data-center replication and fault-tolerant topologies
  • Combines SQL, streaming, federated queries, and external integrations

  Where it doesn't

  • Managed charges vary by usage, region, and dedicated resources
  • Change data capture is specified for row-oriented tables
  • Its broad feature set may exceed the needs of narrow database projects

• PolarDB-X — where it wins

  • Transparent distribution with automatic partition rebalancing
  • Strongly consistent transactions with Paxos high availability
  • HTAP support with column-store nodes and global secondary indexes

  Where it doesn't

  • Pricing varies by region, instance type, storage, and billing method
  • Advanced distributed architecture may exceed simpler database needs
  • Some ecosystem integrations are centered on Alibaba Cloud services

• YYDB8.6/10 · Open source

  A broad open-source choice for strongly consistent, distributed SQL workloads.

  Visit YDBFull verdict →
• PolarDB-X8.5/10 · Paid

  A MySQL-compatible distributed database for scalable HTAP and high-concurrency workloads.

  Visit PolarDB-XFull verdict →