5 Best Open Source Alternatives to Oracle Database

1.TiDB

40.2kApache-2.0Go Self-host

TiDB is an open-source, cloud-native, distributed SQL database for workloads that need strong consistency, high availability, and scale. It supports ACID distributed transactions, MySQL 8.0 compatibility, and deployment across public clouds, on-premises environments, Kubernetes, or TiDB Cloud.

• ACID distributed transactions using two-phase commit
• MySQL 8.0 compatibility for existing drivers, frameworks, and tools
• HTAP with TiKV row storage and TiFlash columnar storage
• Raft consensus, multiple replicas, and automated failover

2.CockroachDB

32.2kOtherGo Self-host

CockroachDB is a cloud-native distributed SQL database for modern, data-intensive applications. It is built on a transactional, strongly consistent key-value store and provides a familiar SQL API for structuring, manipulating, and querying data.

• Distributed SQL database built on a strongly consistent key-value store
• Strongly consistent ACID transactions
• Horizontal scaling across a cluster
• Survives disk, machine, rack, and datacenter failures

3.PostgreSQL

21.2kOtherC Self-host

PostgreSQL is an advanced object-relational database management system. It stores and queries structured data using an extended subset of the SQL standard, with transactions, foreign keys, subqueries, triggers, user-defined types, and user-defined functions.

• Extended SQL with transactions and foreign keys
• Subqueries, triggers, and user-defined types
• User-defined functions
• C language bindings for client applications

4.YugabyteDB

10.3kOtherC Self-host

YugabyteDB is a PostgreSQL-compatible, cloud-native distributed SQL database for OLTP applications that need transactional consistency, scalability, failure tolerance, or globally distributed deployment. It combines relational database capabilities with NoSQL-style horizontal scaling.

• PostgreSQL-compatible YSQL query layer
• Distributed ACID transactions with Raft consensus
• Horizontal scaling by adding nodes
• Multi-zone, multi-region, and multi-cloud deployments

5.MariaDB

7.7kGPL-2.0C++ Self-host

MariaDB is an open source relational database server designed as a drop-in replacement for MySQL, with more features, additional storage engines, and a focus on performance. It was created by many of the original MySQL developers and keeps close compatibility with MySQL as a core goal.

• Drop-in replacement for MySQL
• Pluggable storage engines beyond the MySQL base
• Built-in full-text search, GIS, and JSON support
• Close compatibility with MySQL applications