Isar

Spec sheet

Product

Isar is a super-fast cross-platform NoSQL database for Flutter.Read 30 Sep 2026 · isar.dev

Support

The documentation asks users to open an issue or submit a pull request for documentation errors.Read 30 Sep 2026 · isar.dev

License

Isar is open source, free forever, and Apache licensed.Read 30 Sep 2026 · isar.dev

App size

Isar adds about 1–1.5 MB to an app download, while Isar Web adds only a few KB.Read 30 Sep 2026 · isar.dev

Concurrency

Isar provides parallel query operations and multi-isolate support out of the box.Read 30 Sep 2026 · isar.dev

Full-text search

Isar has built-in full-text search using a multi-entry index.Read 30 Sep 2026 · isar.dev

Indexes

Isar supports composite and multi-entry indexes, query modifiers, and JSON support.Read 30 Sep 2026 · isar.dev

Scalability

Isar can store hundreds of thousands of records in one NoSQL database and query them efficiently and asynchronously.Read 30 Sep 2026 · isar.dev

Setup

Isar provides minimal setup with no configuration or boilerplate.Read 30 Sep 2026 · isar.dev

Static typing

Isar queries are statically typed and checked at compile time.Read 30 Sep 2026 · isar.dev

Target users

Isar is designed for Flutter developers who need local data access when a network connection is unavailable.Read 30 Sep 2026 · isar.dev

Transactions

Isar is ACID compliant, handles transactions automatically, and rolls back changes when an error occurs.Read 30 Sep 2026 · isar.dev

VM limit

On VM platforms, only the first 1024 bytes of a string can be used for a prefix where-clause and objects can be at most 16MB.Read 30 Sep 2026 · isar.dev

Web limits

On Web, synchronous methods are unsupported, splitWords() and matches() filters are not implemented, and NaN is unsupported.Read 30 Sep 2026 · isar.dev

Plans and prices

Every Isar plan and price →

Where Specifiction places it

• Mobile Databases#17 of 267.7