eXtremeDB vs ObjectBox
eXtremeDB
mcobject.com
ObjectBox
objectbox.ioSide by side
| Figure | eXtremeDB | ObjectBox |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 2 |
| Spec score · Embedded Databases | 8.0 (#10) | 7.9 (#14) |
| Headquarters | Federal Way, Washington, USA | Germany, Europe |
| Intended users | McObject describes eXtremeDB for HPC as intended for capital markets and other high-performance computing applications. | ObjectBox describes its focus as mobile and IoT development, particularly decentralized systems of restricted devices and offline scenarios. |
| Security | Network communications can use TLS/SSL, with support for OpenSSL and wolfSSL implementations. | ObjectBox Sync Server supports JWT authentication and can use TLS by supplying a certificate; its documentation describes no-authentication mode as insecure. |
| Support | Product support is available from McObject’s engineering team on an annual contract and includes software updates and a 50 percent discount on major upgrades. | The FAQ directs questions to documentation and Stack Overflow, and says professional support is offered to paying customers. |
Plans
In their own words
eXtremeDB
eXtremeDB is an in-memory database system designed for embedded devices and applications. It can combine in-memory and persistent storage within one database system. Interfaces include native APIs, REST, SQL, ODBC, and JDBC, with language APIs for C/C++, Java, Python, C#, Go, and Rust. For time-series data, a sequence type provides columnar storage. Distributed options include High Availability, Cluster, and Active Replication Fabric for replication across IoT tiers. Network communications can use TLS/SSL with OpenSSL or wolfSSL. Technical specifications list maximum database sizes of 4 GB on 32-bit architectures and 18.4 exabytes on 64-bit architectures. eXtremeDB supports Android, iOS, Linux, macOS, and Windows, and can be self-hosted. Evaluation downloads are listed for Linux, macOS, and Windows; custom trial packages can be requested for other platforms. McObject offers annual engineering support contracts that include software updates and a 50 percent discount on major upgrades. Commercial licensing is paid, with pricing available on request, and a 60-day trial is listed.
ObjectBox
ObjectBox is an embedded, object-oriented NoSQL database for mobile applications and IoT devices. Its database provides 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 cases. Listed language APIs include Java, Kotlin, Swift, Flutter/Dart, Go, Python and C/C++. The product supports vector search, with no embedding-column dimension limit stated in its FAQ. ObjectBox says it supports direct synchronization to MongoDB; connectors for other backend databases may require custom development. Its Sync Server can be self-hosted on POSIX systems and cloud providers, though ObjectBox does not currently provide cloud hosting. The core database plan is free; Sync pricing is quoted per project based on needs. The company describes its focus as mobile and IoT development, particularly decentralized systems with restricted devices and offline scenarios. Mesh Sync is available for Android Java/Kotlin and Flutter/Dart starting with version 6.0.0-beta, with APIs that may change before final release.