# MySQL vs PostgreSQL

| Attribute | MySQL | PostgreSQL |
|---|---|---|
| **Vioscale score** | 55.6 (51% (medium)) | 59.8 (56% (medium)) |
| activity.commits_last_30d | 2 | 100 |
| adoption.dependent_repos | 664 | 0 |
| adoption.github_stars | 12,407 | 21,899 |
| adoption.stackoverflow_questions | 230,000 | 170,000 |
| content.faq | `[{"answer":"MySQL is a relational database management system that organizes data into structured tables and is one of the most widely deployed databases globally. It powers web applications, content management systems, e-commerce platforms, and services built with development stacks like LAMP (Linux, Apache, MySQL, PHP) or LEMP. The database is known for ease of use, reliability, and solid performance for read-heavy workloads.","source":"https://www.mysql.com","question":"What is MySQL and what is it primarily used for?","confidence":0.95},{"answer":"MySQL is open-source software distributed under the GNU General Public License, making it free to download, use, and modify. Oracle offers a commercial license for organizations with specific legal or support requirements, but the core database engine costs nothing. Managed hosting services and enterprise support may incur fees depending on the provider and service tier.","source":"https://www.mysql.com/about/","question":"Is MySQL open-source and what are the licensing and cost options?","confidence":0.93},{"answer":"MySQL is language-agnostic and supports connections from all major programming languages including PHP, Python, Node.js, Java, C++, Ruby, Go, and .NET. Virtually every web framework has built-in or third-party database drivers that work with MySQL, making it compatible with diverse technology stacks.","source":"https://www.mysql.com/products/connector/","question":"What programming languages and frameworks can connect to MySQL?","confidence":0.94},{"answer":"MySQL runs on Linux, Windows, macOS, FreeBSD, and other Unix-based systems, giving developers flexibility to work in their preferred environment. This cross-platform support makes MySQL deployable across different infrastructure and simplifies consistency between development and production environments.","source":"https://www.mysql.com/downloads/","question":"What operating systems can run MySQL?","confidence":0.96},{"answer":"MySQL can be deployed either as a self-hosted database on your own servers or cloud infrastructure, or accessed as a fully managed database service through providers like Amazon RDS, Google Cloud SQL, and Azure Database for MySQL. Self-hosting offers maximum control and customization, while managed services handle routine maintenance, backups, patching, and scaling.","source":"https://www.mysql.com/","question":"How is MySQL typically deployed: self-hosted or managed service?","confidence":0.94},{"answer":"MySQL's InnoDB storage engine (the default since version 5.5) provides full ACID compliance, supporting transactions that guarantee data consistency and durability across failures. Older storage engines like MyISAM lack transaction support, but InnoDB has become the standard for production applications requiring reliable data integrity.","source":"https://www.mysql.com/","question":"Does MySQL support transactions and ACID compliance?","confidence":0.95},{"answer":"PostgreSQL is a feature-rich open-source relational database; MariaDB is an open-source MySQL fork; SQLite is a lightweight embedded option; commercial databases include Microsoft SQL Server and Oracle Database. The choice depends on requirements for specific features, scalability needs, compliance mandates, and budget.","source":"https://www.mysql.com/","question":"What are the main open-source and commercial alternatives to MySQL?","confidence":0.92},{"answer":"MySQL powers major platforms including Wikipedia, YouTube, and many large social networks, demonstrating its capability to handle massive workloads and billions of data operations. It is equally effective for startups and smaller applications, making it viable across organizations of all sizes from single-server deployments to global-scale distributed systems.","source":"https://www.mysql.com/","question":"At what scale can MySQL operate and who uses it?","confidence":0.9}]` | `[{"answer":"PostgreSQL is a free, open-source relational database system that emphasizes extensibility and standards compliance. It provides robust support for complex data types and advanced query capabilities, making it suitable for both small applications and large-scale enterprise deployments.","source":"https://www.postgresql.org","question":"What is PostgreSQL?","confidence":0.95},{"answer":"PostgreSQL is open-source and available at no cost under the PostgreSQL License. Organizations can deploy and modify the software without paying licensing fees, though managed hosting services may charge for their infrastructure and support.","source":"https://www.postgresql.org/about/licence/","question":"Is PostgreSQL free to use?","confidence":0.95},{"answer":"PostgreSQL is cross-platform and runs on Linux, Unix, Windows, macOS, and other operating systems. This broad platform support makes it accessible for diverse infrastructure environments.","source":"https://www.postgresql.org/download/","question":"What operating systems does PostgreSQL support?","confidence":0.95},{"answer":"PostgreSQL fully implements ACID (Atomicity, Consistency, Isolation, Durability) transactions, ensuring that database operations are reliable and data remains consistent even in the face of failures or concurrent access patterns.","source":"https://www.postgresql.org/docs/current/tutorial-concepts.html","question":"Does PostgreSQL guarantee data integrity through ACID compliance?","confidence":0.95},{"answer":"Organizations often evaluate PostgreSQL alongside MySQL for relational workloads, Oracle or Microsoft SQL Server for large enterprise deployments, and NoSQL systems like MongoDB for document-based requirements. The choice depends on specific priorities around complexity, scalability, and data structure needs.","source":"https://www.postgresql.org","question":"What are common database alternatives to PostgreSQL?","confidence":0.9},{"answer":"PostgreSQL can be deployed on self-managed infrastructure using binary installations or containerization, or through managed database services from cloud platforms such as AWS RDS, Google Cloud SQL, and Azure Database for PostgreSQL. Managed services typically handle automated backups, scaling, and routine maintenance.","source":"https://www.postgresql.org/download/","question":"How can developers deploy PostgreSQL?","confidence":0.9},{"answer":"PostgreSQL supports JSON/JSONB data types for semi-structured data, full-text search capabilities, window functions, Common Table Expressions, and custom extensions through its extensibility architecture. These features reduce the need for application-layer complexity and the addition of specialized separate systems.","source":"https://www.postgresql.org/docs/current/sql-syntax.html","question":"What advanced features enable complex analytical and transactional work in PostgreSQL?","confidence":0.9},{"answer":"PostgreSQL is used in production by thousands of organizations ranging from startups to large enterprises. It includes comprehensive features for data replication, backup strategies, and high-availability configurations, making it a reliable choice for applications where data consistency and uptime are critical.","source":"https://www.postgresql.org/","question":"Is PostgreSQL suitable for production and mission-critical applications?","confidence":0.9}]` |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | MySQL is an open-source SQL database management system that serves as the foundation for many web-based applications and cloud services. Available in both a free community edition and a commercial enterprise edition with advanced features and professional support. | PostgreSQL is a mature open-source relational database system combining strong data integrity with comprehensive features and active community maintenance. |
| features.capabilities | `{"isolation":"serializable","sql_model":"full_sql","deployment":"self_hosted","serverless":true,"consistency":"strong","replication":"async","extensibility":true,"json_document":true,"license_class":"copyleft","horizontal_scale":"distributed_native","acid_transactions":"full","automatic_failover":true,"wire_compatibility":"mysql"}` | `{"sql_model":"full_sql","deployment":"self_hosted","serverless":false,"geo_spatial":"extension","extensibility":true,"json_document":true,"license_class":"permissive","horizontal_scale":"read_replica","automatic_failover":true}` |
| integrations.count | - | 10 |
| integrations.list | - | `[{"name":"CloudNativePG"},{"name":"Kubernetes"},{"name":"Patroni"},{"name":"pgAdmin"},{"name":"pgVector"},{"name":"PostGIS"},{"name":"pgAudit"},{"name":"Spock"},{"name":"Cilium"},{"name":"Submariner"}]` |
| language.primary | C++ | C |
| license.spdx | GPL-2.0 | PostgreSQL |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"source":"https://www.postgresql.org","confidence":0.95,"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"web":true}` | `{"cli":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","plans":[{"free":true,"name":"MySQL Community Server","description":"Free open source database","contactSales":false},{"free":false,"name":"MySQL Enterprise Edition","description":"Advanced features, management tools, and technical support","contactSales":true},{"free":false,"name":"MySQL Standard Edition","contactSales":true},{"free":false,"name":"MySQL Classic Edition","contactSales":true}],"summary":"Community edition free; Enterprise/Standard/Classic editions require contacting sales","freeTier":true,"sourceUrl":"https://www.mysql.com","retrievedAt":"2026-07-08T12:01:40.782Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://www.postgresql.org","retrievedAt":"2026-08-14T12:11:14.172Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | commercial |
| pricing.price_level | low | free |
| pricing.transparent | no | - |
| release.cadence_days | 90 | 90 |
| security.disclosure_policy | - | yes |
| security.scorecard | 4.6 | 6.1 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=homebrew&package_name=mysql&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=helm&package_name=openstack-helm%2Fpostgresql&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Relational Databases)

| Capability | MySQL | PostgreSQL |
|---|:--:|:--:|
| **Core** |  |  |
| SQL model | Full SQL | Full SQL |
| **Transactions** |  |  |
| ACID transactions | Full | - |
| Highest isolation level | Serializable | - |
| **Consistency** |  |  |
| Consistency | Strong | - |
| **Scale** |  |  |
| Horizontal scale | Natively distributed | Read replicas |
| **Replication** |  |  |
| Replication | Async | - |
| **Availability** |  |  |
| Automatic failover / HA | ✓ | ✓ |
| **Deployment** |  |  |
| Deployment | Self-hosted | Self-hosted |
| Serverless / scale-to-zero | ✓ | ✗ |
| **Compatibility** |  |  |
| Wire compatibility | MySQL protocol | - |
| **Extensibility** |  |  |
| Extensions / plugins / UDFs | ✓ | ✓ |
| **Licensing** |  |  |
| Licence class | Copyleft | Permissive OSS |
| **Data types** |  |  |
| JSON / document support | ✓ | ✓ |
| Geo / spatial | - | Extension |

*Source: Vioscale. Generated 2026-09-01T16:37:35.886Z. "-" = undocumented, not absent.*