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Firebird
What it is
Firebird is a free, open-source relational database management system with ANSI SQL features for Linux, macOS, Windows, and self-hosted deployment. Its multi-generation architecture generally lets readers access data without blocking writers. SQL facilities include stored procedures, triggers, common table expressions, cross-database queries, and flexible transaction management. Monitoring tables and a Trace API support real-time monitoring, SQL debugging, and auditing. Security includes users, roles, GRANT and REVOKE permissions, and a database-owner concept. Windows Trusted Authentication can connect sign-in with Windows domain or Active Directory security. Deployment options include embedded, SuperServer, SuperClassic, and Classic architectures, with Windows installers and RPM or tar.gz distributions. Firebird supports online backups and dumps, plus incremental backup with partially supported point-in-time recovery. Drivers cover Java JDBC, .NET, Python, ODBC, PHP, Delphi, and C++ Builder. Community support is free; an enterprise subscription is listed at €199 a month, billed from €199/month/1 servers. Current series include 5.0.4, 4.0.7, and 3.0.14.
For and against
For
- Free plan has no download or licensing fees
- Readers usually avoid blocking writers
- Includes stored procedures and triggers
- Provides Trace API and monitoring tables
- Offers embedded and server architectures
Against
- Older than 2.5 series are discontinued
- Enterprise subscription costs €199 a month
- Point-in-time recovery is only partially supported
The verdict
Firebird offers a broad SQL database feature set with flexible self-hosted deployment and free community use. Paid enterprise support is available, while discontinued older series require attention when selecting versions.
Who it suits
Firebird suits developers and administrators needing a self-hosted relational database with SQL, monitoring, security, backup, and multiple deployment architectures. It supports projects using several programming languages and operating systems.
Plans and prices
Firebird SQL
No fees for download, registration, licensing, or deployment, including commercial distribution
Read 4 Oct 2026 · firebirdsql.org
Enterprise subscription
Proactive automated monitoring · human support · support for old Firebird versions
Read 4 Oct 2026 · firebirdsql.org
On the record
- Authentication
- Windows Trusted Authentication supports single sign-on and integration with Windows domain or Active Directory security.firebirdsql.org · read 4 Oct 2026
- Backup
- Firebird supports online backups and dumps, plus incremental backup with partially supported point-in-time recovery.firebirdsql.org · read 4 Oct 2026
- Concurrency
- Its multi-generation architecture lets readers access data without blocking writers under most conditions.firebirdsql.org · read 4 Oct 2026
- Current releases
- The downloads page lists Firebird 5.0.4, 4.0.7, and 3.0.14 as the latest versions in their series.firebirdsql.org · read 4 Oct 2026
- Deployment
- Firebird offers embedded, SuperServer, SuperClassic, and Classic architectures, plus Windows installers and RPM or tar.gz distributions.firebirdsql.org · read 4 Oct 2026
- Drivers
- Connectivity options include Java JDBC, .NET, Python, ODBC, PHP, Delphi, and C++ Builder drivers.firebirdsql.org · read 4 Oct 2026
- Licensing
- Firebird modules are released under the Initial Developer's Public License, a variant of the Mozilla Public License 1.1.firebirdsql.org · read 4 Oct 2026
- Monitoring
- Firebird offers a Trace API and monitoring tables for real-time monitoring, SQL debugging, and auditing.firebirdsql.org · read 4 Oct 2026
- Network
- The site says Firebird normally uses network port 3050, which can be configured, and database aliases avoid exposing database paths.firebirdsql.org · read 4 Oct 2026
- Notable limit
- The downloads page says Firebird 2.5 and earlier listed series are discontinued and no longer maintained by the project.firebirdsql.org · read 4 Oct 2026
- Product
- Firebird is an open source relational database management system with ANSI SQL features.firebirdsql.org · read 4 Oct 2026
- Security
- Security features include users and roles, GRANT and REVOKE permissions, and a database owner concept.firebirdsql.org · read 4 Oct 2026
- SQL capabilities
- Features include stored procedures, triggers, common table expressions, cross-database queries, and flexible transaction management.firebirdsql.org · read 4 Oct 2026
- Support
- Free community support is available through Firebird support mailing lists, with commercial and special support also offered.firebirdsql.org · read 4 Oct 2026
