Apache CouchDB
Document database with replication and HTTP/JSON APIs.
Why it is included
Apache-2.0 licensed with a distinct replication model for offline-first apps.
Best for
Document-centric apps needing sync-friendly semantics.
If you use Windows, Mac, or paid tools
Document/sync database alternative to Firebase Realtime Database and proprietary mobile-sync backends you self-host.
Strengths
- Replication model
- HTTP API
Limitations
- Different ops profile than Postgres
Good alternatives
PostgreSQL + JSONB
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