# Flyway vs SQLAlchemy

**Leader by vioscaleAI score:** SQLAlchemy

| Attribute | Flyway | SQLAlchemy |
|---|---|---|
| **vioscaleAI score** | 53.9 (50% (medium)) | 74.7 (78% (high)) |
| activity.commits_last_30d | 5 | 82 |
| adoption.dependent_repos | 30,708 | 53,487 |
| adoption.github_stars | 10,142 | 12,245 |
| adoption.package_downloads_weekly | - | 9,800,000 |
| adoption.stackoverflow_questions | - | 34,000 |
| content.faq | `[{"answer":"An industry-proven tool that simplifies database migration management using SQL scripts, supporting both command-line and graphical interfaces for organizing and deploying schema changes It is indexed under ORM & Database Tools.","source":"https://flywaydb.org","question":"What is Flyway?","confidence":0.6},{"answer":"Flyway is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Paid editions are also offered: Enterprise, priced on request. Pricing changes often, so verify at source before relying on it.","source":"https://flywaydb.org","question":"Is Flyway free to use?","confidence":0.6},{"answer":"Flyway supports Windows, macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://flywaydb.org","question":"What platforms does Flyway support?","confidence":0.6},{"answer":"Yes. Flyway can be deployed on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://flywaydb.org","question":"Can Flyway be self-hosted?","confidence":0.6},{"answer":"We have confirmed 12 integrations for Flyway, including Maven, Gradle, SBT, Ant, Spring Boot, Grails, Play! and DropWizard, plus 4 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://flywaydb.org","question":"What does Flyway integrate with?","confidence":0.6},{"answer":"Yes. Flyway is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/flyway/flyway","question":"Is Flyway open source?","confidence":0.95},{"answer":"Flyway is available worldwide. The vendor is headquartered in the United Kingdom.","source":"https://flywaydb.org","question":"Where is Flyway available?","confidence":0.75}]` | `[{"answer":"SQLAlchemy is a Python library that provides both an Object-Relational Mapping (ORM) layer and a SQL expression toolkit for interacting with relational databases. It abstracts away low-level SQL details, allowing developers to work with database objects as Python classes and manage database queries programmatically rather than writing raw SQL strings. This approach reduces code repetition, improves maintainability, and makes database interactions more Pythonic.","source":"https://www.sqlalchemy.org","question":"What is SQLAlchemy and what problem does it solve?","confidence":0.95},{"answer":"Yes, SQLAlchemy is completely free and open-source, distributed under the MIT license. There are no licensing fees, commercial tiers, or restricted versions - the software is available for both personal and commercial use at no cost. The project accepts voluntary donations and sponsorships to support ongoing development.","source":"https://www.sqlalchemy.org","question":"Is SQLAlchemy free and open-source?","confidence":0.98},{"answer":"SQLAlchemy supports all major relational databases through a dialect system, including PostgreSQL, MySQL, MariaDB, SQLite, Oracle Database, Microsoft SQL Server, and others. Each database is accessed through a specific dialect implementation that handles database-specific features and SQL syntax variations. This modular approach allows developers to write largely database-agnostic code while still accessing database-specific capabilities when needed.","source":"https://docs.sqlalchemy.org/20/","question":"What databases does SQLAlchemy support?","confidence":0.94},{"answer":"SQLAlchemy Core is the lower-level SQL toolkit that handles direct SQL expression construction, engine configuration, connection pooling, and schema definition without requiring object mapping. The ORM layer builds on top of Core and allows mapping Python classes to database tables, enabling object-oriented patterns for CRUD operations and relationship management. Developers can use either layer independently depending on their needs - Core for complex queries, Core for building query builders, and ORM for domain-driven database interactions.","source":"https://docs.sqlalchemy.org/20/","question":"What's the difference between SQLAlchemy's ORM and Core layers?","confidence":0.93},{"answer":"Yes, SQLAlchemy provides built-in support for asyncio-based applications, allowing non-blocking database operations in async frameworks like FastAPI and Starlette. Async support requires compatible database drivers (such as asyncpg for PostgreSQL) and is available in both the ORM and Core layers. This enables developers to write concurrent, high-performance applications without blocking the event loop.","source":"https://docs.sqlalchemy.org/20/","question":"Does SQLAlchemy support asynchronous database operations?","confidence":0.91},{"answer":"Yes, SQLAlchemy is widely deployed in production environments at organizations ranging from startups to enterprises. It provides enterprise-level features including connection pooling, query optimization capabilities, relationship eager-loading strategies, and support for complex schema patterns. However, developers must understand performance implications and implement proper indexing and query optimization for high-traffic or data-heavy applications.","source":"https://docs.sqlalchemy.org/20/","question":"Is SQLAlchemy suitable for large-scale and production applications?","confidence":0.92},{"answer":"Common Python ORMs and database tools include Django ORM (tightly integrated with Django), Peewee (lightweight ORM), Tortoise ORM (async-first ORM), and SQLModel (combines SQLAlchemy with Pydantic for validation). Django ORM is best suited for Django projects, while SQLAlchemy is framework-agnostic and works equally well with Flask, FastAPI, or standalone applications. Each tool has different philosophies regarding API design, performance characteristics, and feature sets.","source":"https://www.sqlalchemy.org","question":"What are common alternatives to SQLAlchemy for Python developers?","confidence":0.86},{"answer":"SQLAlchemy was created by Michael Bayer and continues to be actively maintained as an open-source project with contributions from a community of developers. The project follows semantic versioning and regular release cycles with both major versions (like version 2.0) that introduce breaking changes and minor/patch releases for new features and bug fixes. The development is transparent, with public code repositories and community involvement in decision-making.","source":"https://www.sqlalchemy.org","question":"Who maintains SQLAlchemy and how is it developed?","confidence":0.88}]` |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | A database migration tool that applies version-controlled schema changes to database instances using SQL. Supports 60+ database platforms and has been maintained by Redgate since 2010. | A Python-based database toolkit offering both an Object-Relational Mapper for domain-driven development and a SQL construction system for direct database interaction, supporting multiple database backends. |
| features.capabilities | `{"raw_sql":true,"multi_db":true,"languages":"Java; Maven/Gradle plugins; integrations for multiple build frameworks","migrations":true,"studio_gui":true,"schema_first":true}` | `{"raw_sql":true,"multi_db":true,"languages":"Python","relations":true,"migrations":false,"studio_gui":false,"schema_first":true,"type_safe_queries":true,"connection_pooling":true}` |
| integrations.count | 1 | 6 |
| integrations.list | `[{"name":"Maven"},{"name":"Gradle"},{"name":"SBT"},{"name":"Ant"},{"name":"Spring Boot"},{"name":"Grails"},{"name":"Play!"},{"name":"DropWizard"},{"name":"Grunt"},{"name":"Griffon"},{"name":"Ninja"},{"name":"SQL Fluff"}]` | `[{"name":"PostgreSQL"},{"name":"MySQL"},{"name":"Oracle"},{"name":"SQL Server"},{"name":"SQLite"},{"name":"Alembic"}]` |
| language.primary | Java | Python |
| license.spdx | Apache-2.0 | MIT |
| market.availability | `{"hqCountry":"GB","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"mac":true,"linux":true,"windows":true}` | - |
| pricing | `{"type":"freemium","plans":[{"free":true,"name":"Community","description":"Open source database migrations tool for individual developers"},{"free":false,"name":"Enterprise","description":"Enterprise-grade solution with GUI and advanced database change management capabilities","contactSales":true}],"summary":"Free open-source Community edition; Enterprise edition available","freeTier":true,"sourceUrl":"https://flywaydb.org","retrievedAt":"2026-08-14T16:43:41.014Z"}` | `{"type":"open_source","sourceUrl":"https://www.sqlalchemy.org","retrievedAt":"2026-10-15T20:22:43.871Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | open_source |
| pricing.price_level | low | free |
| pricing.transparent | no | yes |
| release.cadence_days | 8 | 8 |
| release.history | 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| `[{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_1_4","date":"2026-10-07T17:34:05Z","type":"stable","version":"rel_2_1_4"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_1_3","date":"2026-10-02T22:57:05Z","type":"stable","version":"rel_2_1_3"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_1_2","date":"2026-10-02T04:16:00Z","type":"stable","version":"rel_2_1_2"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_1_1","date":"2026-09-25T14:59:05Z","type":"stable","version":"rel_2_1_1"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_1_0","date":"2026-09-24T20:13:01Z","type":"stable","version":"rel_2_1_0"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_0_54","date":"2026-09-15T21:07:03Z","type":"stable","version":"rel_2_0_54"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_0_53","date":"2026-09-14T20:37:38Z","type":"stable","version":"rel_2_0_53"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_1_0rc2","date":"2026-09-08T18:48:59Z","type":"prerelease","version":"rel_2_1_0rc2"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_1_0rc1","date":"2026-08-31T22:16:44Z","type":"prerelease","version":"rel_2_1_0rc1"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_0_52","date":"2026-08-11T19:07:15Z","type":"stable","version":"rel_2_0_52"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_1_0b3","date":"2026-06-27T18:52:35Z","type":"prerelease","version":"rel_2_1_0b3"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_0_51","date":"2026-06-15T15:41:27Z","type":"stable","version":"rel_2_0_51"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_0_50","date":"2026-05-24T19:20:11Z","type":"stable","version":"rel_2_0_50"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_1_0b2","date":"2026-04-16T20:16:21Z","type":"prerelease","version":"rel_2_1_0b2"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_0_49","date":"2026-04-03T16:38:18Z","type":"stable","version":"rel_2_0_49"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_0_48","date":"2026-03-02T15:28:58Z","type":"stable","version":"rel_2_0_48"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_0_47","date":"2026-02-24T16:34:33Z","type":"stable","version":"rel_2_0_47"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_0_46","date":"2026-01-21T18:03:51Z","type":"stable","version":"rel_2_0_46"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_1_0b1","date":"2026-01-21T20:56:58Z","type":"prerelease","version":"rel_2_1_0b1"},{"url":"https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_2_0_45","date":"2025-12-09T21:05:22Z","type":"stable","version":"rel_2_0_45"}]` |
| security.scorecard | 4.8 | 5.2 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.flywaydb%3Aflyway-core&per_page=100","last_12m":0,"max_severity":null}` | `{"count":3,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=sqlalchemy&per_page=100","last_12m":0,"max_severity":"CRITICAL"}` |

## Capabilities (ORM & Database Tools)

| Capability | Flyway | SQLAlchemy |
|---|:--:|:--:|
| **Core** |  |  |
| Type-safe queries | - | ✓ |
| Schema migrations | ✓ | ✗ |
| Relations / joins API | - | ✓ |
| Languages | Java; Maven/Gradle plugins; integrations for multiple build frameworks | Python |
| **Modelling** |  |  |
| Schema-first modelling | ✓ | ✓ |
| **Flexibility** |  |  |
| Raw SQL escape hatch | ✓ | ✓ |
| **Portability** |  |  |
| Multiple database backends | ✓ | ✓ |
| **Ops** |  |  |
| Connection pooling | - | ✓ |
| **DX** |  |  |
| Data browser / studio | ✓ | ✗ |

*Source: vioscaleAI. Generated 2026-10-16T01:45:06.773Z. "-" = undocumented, not absent.*