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Atlas vs sqldef: catalog facts
Atlas	sqldef
Freemium The tool is free to start with; paid plans are listed on the pricing page.	Free Free and open source under the MIT and Apache 2.0 licences.
Command line	Windows, macOS, Linux, Command line
Declarative schema management with automatic migration planning Migration linting and drift detection	Declarative schema in plain SQL Idempotent: only needed changes are applied
Some features are tied to paid plans Command-line and config driven, no visual editor	Command line only Declarative diffs need care with destructive changes
Downloadable app, Hosted service	Downloadable app
Closed source	Open source
License not stated	License: MIT, Apache-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.