eXtremeDB

Windows · Mac · Linux · Android · iPhone · Self-hosted · API

Freedom report

Two barsScore 5.2

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely5 of 6 device platforms
DocumentedPlans, terms and facts published

eXtremeDB is ranked #22 of 31 in embedded databases on Freedom251. It runs on Android, API, iOS, Linux, macOS, Self-hosted, Windows. There is no free plan. A free trial is offered.

eXtremeDB plans and pricing

All plans

eXtremeDB commercial license Not published Contact McObject for licensing options. License options are discussed with McObject mcobject.com · 29 Sept 2026

Compared on embedded databases

Deployment: both
Data persistence: Yes
High availability: Yes
SQL support: Yes
Vector search: Yes
Supported data models: relational SQL, object-based/native, row-oriented, columnar time-series, in-memory, persistent, hybrid

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The record

Purpose: eXtremeDB is an in-memory database system designed for embedded devices and applications.
Storage: It supports hybrid in-memory and persistent storage in a single database system.
APIs: The product provides native APIs, REST, SQL, ODBC and JDBC interfaces, with listed APIs for languages including C/C++, Java, Python, C#, Go and Rust.
Time series: A sequence data type provides columnar storage for time-series data.
Distributed options: Its distributed options include High Availability, Cluster and Active Replication Fabric for replication across IoT tiers.
Security: Network communications can use TLS/SSL, with support for OpenSSL and wolfSSL implementations.
Database limits: The technical specifications list maximum database sizes of 4 GB on 32-bit and 18.4 exabytes on 64-bit architectures.
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.
Intended users: McObject describes eXtremeDB for HPC as intended for capital markets and other high-performance computing applications.
Trial platforms: The evaluation page lists Linux, macOS and Windows downloads and says custom trial packages can be requested for other platforms.
Company history: McObject says it was founded in 2001 alongside the introduction of eXtremeDB.
Founded: 2001
Headquarters: Federal Way, Washington, USA

Where it ranks on Freedom251

Best Embedded Databases in 2026#22 of 31
Best In-Memory Databases in 2026#11 of 25

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Sources

mcobject.com/download/extremedb-in-memory-database-s· checked 29 Sept 2026
mcobject.com/download/extremedb-hybrid-database-syst· checked 29 Sept 2026
mcobject.com/tech-spec/· checked 29 Sept 2026
mcobject.com/docs/Content/Users_Guides/Core/Network_· checked 29 Sept 2026
mcobject.com/support/· checked 29 Sept 2026
mcobject.com/extremedb-for-hpc-faqs/· checked 29 Sept 2026
mcobject.com/software_eval/· checked 29 Sept 2026
mcobject.com/about-mcobject/· checked 29 Sept 2026
mcobject.com/extremedb/· checked 28 Sept 2026