Data & backend in Flutter using isar

Extremely fast, easy to use, and fully async NoSQL database for Flutter.

CategoryBackend/Data
Stars★ 4,020
Last update2025-06-14
PriorityHigh

isar is an open-source backend & data library for Flutter mobile app development, with 4,020★ on GitHub and last updated on 2025-06-14. This guide covers what isar does, why it matters in 2026, how to add it to your project, when to reach for it, and how it compares to the alternatives — plus a quick FAQ.

What is isar?

Extremely fast, easy to use, and fully async NoSQL database for Flutter. It focuses on talking to APIs, databases, and persistence layers. The project lives at isar/isar and is maintained by isar.

Why isar is worth knowing in 2026

isar carries 4,020 GitHub stars, 606 forks, 185 open issues. It has been around since 2020, and is mature and stable. For a Backend/Data option, that combination of adoption and upkeep usually means a healthy community, production usage, and plenty of examples to learn from — the things that make a dependency safe to build on.

Installing isar

Add the package to your pubspec.yaml:

dependencies:
  isar: ^latest

Then fetch it and import it in your Dart code:

flutter pub get
import 'package:isar/isar.dart';

Check the package’s example/ directory and its pub.dev page for the exact API — isar is versioned there with full docs so you always integrate against the current release.

When should you use isar?

Reach for isar when:

  • you’re calling REST/GraphQL APIs from a Flutter app
  • you need local storage, caching, or offline sync
  • you want typed, testable data access

It’s especially relevant if your project touches android, cross-platform, dart, database, flutter, ios.

isar vs. the alternatives

If you’re weighing options in the Backend/Data space, these are the other projects developers most often compare isar against:

There’s no single winner — the right pick depends on your app’s size, your team’s familiarity, and your performance budget. Browse the full Backend/Data collection to compare them side by side.

Frequently asked questions

Is isar free to use?

Yes. isar is open source and free to use in your Flutter projects. You can view the source, report issues, and contribute on GitHub.

Does isar work on both iOS and Android?

isar is built for Flutter, so it targets iOS and Android from a single codebase, and typically web and desktop too depending on the project’s platform support.

As of 2026, isar has around 4,020 stars and 606 forks on GitHub, which puts it among the more widely used options in the Backend/Data space.

What are good alternatives to isar?

Popular alternatives in the Backend/Data category include gopeed, mmkv, proxypin. The best choice depends on your app’s size, team, and performance needs.

How do I install isar?

Add isar to the dependencies section of your pubspec.yaml and run flutter pub get. Full versions and API docs are on pub.dev.

Resources & links

Part of FlutterCook — 500 hands-on guides to the best open-source Flutter libraries, UI kits, and apps. Explore the live GitHub trends or browse YouTube guides.

#android#cross-platform#dart#database#flutter#ios