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ObjectBox is a high-performance, NoSQL database for Flutter that enables super-fast, ACID-compliant object persistence. It stores Dart objects directly without requiring boilerplate code or complex mappings. Designed for speed and simplicity, ObjectBox supports real-time data synchronization across Android, iOS, macOS, Windows, and Linux. Its intuitive API allows developers to work with data as native objects, making it ideal for apps needing fast local storage with minimal overhead. ObjectBox handles indexing, queries, and transactions efficiently, ensuring reliable and responsive performance.
Use cases
Offline-first mobile applications
Real-time data synchronization
High-frequency data updates
Local caching of API responses
Cross-platform data persistence
Key features
ACID-compliant transactions
Zero boilerplate object mapping
Fast query performance
Real-time data sync
Support for multiple platforms
Suitable for
Developers seeking high-speed local storage
Apps requiring offline functionality
Projects prioritizing development speed
Cross-platform applications
Data-intensive mobile apps
Considerations
Limited support for complex SQL queries
Learning curve for advanced features
Smaller community compared to SQLite
Not ideal for large-scale server-side databases
Migration handling requires manual planning
Original README
Original README snapshot from the linked source repository. Visit the repository for the latest content.
Flutter database with vector support - easy to use & fast Dart object persistence, plus on-device vector search 💙
Very first on-device vector database for Flutter / Dart AI apps. Intuitive APIs, simply fast.
Persist local Dart objects with ease & speed, efficiently manage vectors.
ObjectBox provides a store with boxes to put objects into:
// Annotate a Dart class to create a Box@Entity()
classPerson{
@Id()
int id;
String firstName;
String lastName;
Person({this.id = 0, requiredthis.firstName, requiredthis.lastName});
}
finalStore store = awaitopenStore(directory: 'person-db');
final box = store.box<Person>();
var person = Person(firstName: 'Joe', lastName: 'Green');
final id = box.put(person); // Create
person = box.get(id)!; // Read
person.lastName = 'Black';
box.put(person); // Update
box.remove(person.id); // Deletefinal query = box // Query
.query(Person_.firstName.equals('Joe') & Person_.lastName.startsWith('B'))
.build();
finalList<Person> people = query.find();
query.close();
ObjectBox Flutter database is an excellent choice for storing Dart objects in cross-platform
applications and the only on-device database that offers you vector support for your on-device AI apps.
Designed for high performance, the ObjectBox Flutter database is excellent for mobile
and IoT devices. ObjectBox consumes minimal CPU, memory, and battery, ensuring that your software is
not only efficient but also sustainable. By storing data locally on the device, ObjectBox allows you
to cut cloud costs and create an app that does not require a connection. Get started with our
intuitive native Dart API in minutes, without the hassle of SQL.
Plus: We built a data synchronization solution that allows you to keep data in sync across devices
and servers, both online and offline.
🏁 High performance - superfast response rates enabling real-time applications.
🪂 ACID compliant - Atomic, Consistent, Isolated, Durable.
💻 Multiplatform - Android, iOS, macOS, Linux, Windows, any POSIX-system.
🌱 Scalable - grows with your app, handling millions of objects with ease.
💚 Sustainable - frugal on CPU, Memory and battery / power use, reducing CO2 emissions.
🔗 Relations - object links / relationships are built-in.
💐 Queries - filter data as needed, even across relations.
🦮 Statically typed - compile time checks & optimizations.
📃 Schema migration - change your model with confidence.
Oh, and there is one more thing...
😮 Data Sync - keeps data in sync offline or online, between devices and servers.
Getting Started
Continue with our ➡️ Getting Started guide. It has resources and video tutorials on how to use ObjectBox in your Flutter or Dart app.
How does ObjectBox compare to other solutions?
ObjectBox is fast. Have a look at our benchmarks below, or test it for yourself
It's a full NoSQL SQLite alternative with intuitive Dart APIs you'll love 💙
It comes with an out-of-the-box Data Sync, making it an effective self-hosted Firebase alternative
Flutter Database Performance Benchmarks
We tested across the four main database operations, CRUD (create, read, update, delete).
Each test was run multiple times and executed manually.
Data preparation and evaluation were done outside the measured time.
Here are the benchmarks for ObjectBox vs sqflite vs Hive (last updated 2021-09-11) 👇
Do you want to check out the ObjectBox code itself? E.g. see it in action, run tests, or even contribute code?
Great! Clone/check out this repository and run this to generate code and get you started quickly:
./tool/init.sh
Also, make sure to have a look at the contribution guidelines - we are looking forward to your contribution.
Packages
This repository holds all ObjectBox Dart/Flutter packages as separate directories:
