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ObjectBox
Germany, Europe
What it is
ObjectBox is an embedded, object-oriented NoSQL database for mobile apps and IoT devices. Its database includes native object APIs, relationships, reactive observers, ACID transactions, and automatic schema migration. ObjectBox Sync can move data between devices and a backend or server, including for offline-first use. The product lists APIs for Java, Kotlin, Swift, Flutter/Dart, Go, Python, and C/C++, and supports platforms including Android, iOS, Linux, Windows, and macOS. Its FAQ says it supports vector search without a limit on embedding-column dimensions. ObjectBox describes direct synchronization to MongoDB; connectors for other backend databases may require custom development. The Sync Server can be self-hosted on POSIX systems and cloud providers, but ObjectBox does not currently provide cloud hosting. The core database plan is free, while Sync pricing is quoted per project. The company focuses on mobile and IoT development, including decentralized systems and offline scenarios. Mesh Sync is available for Android Java/Kotlin and Flutter/Dart starting with version 6.0.0-beta, and its APIs may change before final release.
For and against
For
- Core database plan is free
- Supports offline-first synchronization
- Lists APIs for seven language families
- Includes ACID transactions and schema migration
- Supports vector search
Against
- ObjectBox does not currently provide cloud hosting
- Other backend connectors may need custom development
- Mesh Sync APIs may change before final release
- Sync pricing is quoted per project
The verdict
ObjectBox pairs an embedded database with optional synchronization for mobile and IoT use cases. Its core database is free, while Sync costs are quoted per project and hosting is self-managed.
Who it suits
ObjectBox is suited to developers building mobile or IoT applications, particularly those with offline or decentralized data needs. Teams that need Sync should account for self-hosting or custom backend connectors.
Plans and prices
ObjectBox Database
Core database; fundamental capabilities
Read 29 Sep 2026 · objectbox.io
ObjectBox Sync
Pricing varies by users, devices, sync instances, business model, support, and additional needs
Read 29 Sep 2026 · objectbox.io
On the record
- Certification
- The company’s About page states that ObjectBox is ISO-certified and links to its quality policy.objectbox.io · read 29 Sep 2026
- Database features
- The database offers native object APIs, object relationships, reactive observers, ACID transactions, and automatic schema migration.objectbox.io · read 29 Sep 2026
- Data sync
- ObjectBox Sync synchronizes data between devices and a backend or server, including for offline-first use cases.objectbox.io · read 29 Sep 2026
- Hosting
- The Sync Server can be self-hosted on POSIX systems and cloud providers; the FAQ says ObjectBox does not currently provide cloud hosting.objectbox.io · read 29 Sep 2026
- Integrations
- ObjectBox says it supports directly syncing to MongoDB; other backend database connectors may need to be custom built.objectbox.io · read 29 Sep 2026
- Intended users
- ObjectBox describes its focus as mobile and IoT development, particularly decentralized systems of restricted devices and offline scenarios.objectbox.io · read 29 Sep 2026
- Languages
- ObjectBox lists APIs for Java, Kotlin, Swift, Flutter/Dart, Go, Python, and C/C++.objectbox.io · read 29 Sep 2026
- Limits
- The FAQ says Mesh Sync is currently available for Android Java/Kotlin and Flutter/Dart starting with version 6.0.0-beta, with APIs potentially changing before final release.objectbox.io · read 29 Sep 2026
- Product
- ObjectBox is an embedded, object-oriented NoSQL database for mobile apps and IoT devices.objectbox.io · read 29 Sep 2026
- Security
- ObjectBox Sync Server supports JWT authentication and can use TLS by supplying a certificate; its documentation describes no-authentication mode as insecure.sync.objectbox.io · read 29 Sep 2026
- Support
- The FAQ directs questions to documentation and Stack Overflow, and says professional support is offered to paying customers.objectbox.io · read 29 Sep 2026
- Vector search
- The FAQ says ObjectBox supports vector search and that there are no limits on embedding-column dimensions.objectbox.io · read 29 Sep 2026
