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d9 vs TrailBase: catalog facts
d9	TrailBase
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the Open Software License 3.0.
Web, Self-hosted	Windows, macOS, Linux, Self-hosted
Drop-in replacement for Directus 9 with the same schema Supports PostgreSQL, MySQL, SQLite, Oracle, CockroachDB, MariaDB and MS-SQL	Single executable with no separate database or cache to run Built-in auth, realtime subscriptions and admin UI
Based on the older Directus 9 codebase rather than current Directus Smaller maintainer team than the original project	Postgres support is still experimental Younger and less widely used than Firebase or Supabase
Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License: GPL-3.0	License: OSL-3.0
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 October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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