Data persistence	Description	Primary Model	Data Sync	Language	License	Fun Fact	"Headquarter"
Drift	ORM on top of SQLite	relational	❌	SQL	SQLite is public domain, Drift is MIT	Formerly known as Moor	🇩🇪
Floor	ORM on top of SQLite	relational	❌	SQL	SQLite is public domain, floor is Apache 2.0	Developed by a mobile app agency, not an individual author	🇳🇱
Isar	Lightweight NoSQL database	NoSQL	❌	Dart	Apache 2.0	Also the author of Hive - both libs are not maintained anymore	🇩🇪
Hive	Predecessor of Isar	NoSQL	❌	Dart	Apache 2.0	Also the author of Isar - both libs are not maintained anymore	🇩🇪
ObjectBox	Lightweight NoSQL database with integrated Data Sync	NoSQL	✅	Dart	Bindings are Apache 2.0	It is used in BMW cars 😮	🇩🇪
Realm	NoSQL database acquired by Mongo DB in spring 2019, Flutter binding came in 2023, now deprecated	NoSQL	Deprecated, End of life in Sep 2025; closest substitute is ObjectBox	Dart	Apache 2.0	Originally Realm was developed in Denmark… MongoDB stopped Realm support and the Sync is deprecated	🇺🇸
Sembast	NoSQL database, fully document-based	NoSQL	❌	Dart	BSD-3-Clause	Also the author of SQFlite	🇫🇷
sqflite	SQLite plugin for Flutter	relational	❌	SQL	SQLite is public domain, sqflite lib is MIT	Not an ORM	🇫🇷