Alembic

Alembic is ranked #6 of 32 in database migration tools on Freedom251. It runs on Self-hosted. There is a free plan.

Alembic plans and pricing

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Alembic Free Open-source software under the MIT license github.com · 3 Oct 2026

Compared on database migration tools

Free plan: Yes
Rollback support: Yes
Schema diff: Yes
CI/CD automation: Yes
Drift detection: Yes
Self-hosted option: Yes
Migration format: code

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Alembic

What it does: Alembic is a lightweight database migration tool for use with SQLAlchemy and provides tools to create, manage, and invoke relational database change scripts.
Migration scripts: A project's migration environment is created once and maintained with its source code.
Autogenerate: Alembic compares database schema with application metadata to generate candidate migration scripts that users review and edit by hand.
Offline SQL: Alembic can generate SQL scripts for migrations instead of running them against a database, including for workflows where DDL access is restricted.
SQLite migrations: Batch operations support SQLite's limited ALTER TABLE capabilities by copying data into a newly structured table and replacing the old table.
Database ecosystem: Alembic uses SQLAlchemy and database drivers, and its documentation describes PostgreSQL, MySQL, MariaDB, SQLite, and Microsoft SQL Server dialect implementations.
Autogenerate limitation: Autogenerate does not reliably identify table or column renames and its candidate migrations must be manually reviewed and corrected.
Offline limitation: Migration scripts that need client/server database access, such as pulling rows with SELECT, will not work in offline SQL generation mode.
Python support: Alembic supports Python 3.10 and newer and requires SQLAlchemy 2.0.0 or newer.
Installation: Alembic can be installed with pip and is commonly installed in a project-local Python virtual environment.
Support: The project directs users to GitHub Discussions for bug and feature discussion and its GitHub issue tracker for bug reports and feature requests.
Maintainer: Alembic is developed by Mike Bayer and is part of the SQLAlchemy project.
License: The repository license grants permission to use, copy, modify, distribute, and sell the software, subject to its stated conditions.
Price from: Free

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Where it ranks on Freedom251

Best Database Migration Tools in 2026#6 of 32

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Sources

alembic.sqlalchemy.org/en/latest/· checked 3 Oct 2026
alembic.sqlalchemy.org/en/latest/tutorial.html· checked 3 Oct 2026
alembic.sqlalchemy.org/en/latest/autogenerate.html· checked 3 Oct 2026
alembic.sqlalchemy.org/en/latest/offline.html· checked 3 Oct 2026
alembic.sqlalchemy.org/en/latest/batch.html· checked 3 Oct 2026
alembic.sqlalchemy.org/en/latest/api/ddl.html· checked 3 Oct 2026
alembic.sqlalchemy.org/en/latest/front.html· checked 3 Oct 2026
github.com/sqlalchemy/alembic/blob/main/LICENSE· checked 3 Oct 2026