Actian Zen vs Firebird

Actian Zen is an embedded database for managing data from edge devices through on-premises and cloud applications. Its lightweight engine combines relational storage, native vector search, semantic queries, and connectivity for AI agents. Vector search supports up to 1 million vectors, while hybrid queries combine relational filters with semantic similarity. A native MCP server allows agents such as ChatGPT, Claude, and Gemini to query local data. Zen supports SQL through ODBC and JDBC, and NoSQL through Btrieve and Btrieve 2 APIs. Semantic search, vector queries, and agent workflows can run offline, including in air-gapped environments. Zen Enterprise is designed for embedded, on-premises, and cloud deployments, including branch and remote field settings, and supports Windows, Linux, macOS, Intel, ARM, VMware, Hyper-V, and Docker. Zen Mobile supports Android and iOS with AES 256-bit encryption for stored data. Edge supports over 100 concurrent users; Enterprise is designed for thousands. A 30-day trial is available, with paid pricing from $417/mo (annual).

Firebird is a free, open-source relational database management system with ANSI SQL features. It runs on Linux, macOS, and Windows, and supports self-hosted deployment. Its multi-generation architecture generally allows readers to access data without blocking writers. SQL features include stored procedures, triggers, common table expressions, cross-database queries, and flexible transaction management. A Trace API and monitoring tables support real-time monitoring, SQL debugging, and auditing. Security controls include users and roles, GRANT and REVOKE permissions, and a database owner concept; Windows Trusted Authentication can integrate with Windows domain or Active Directory security. Deployment choices include embedded, SuperServer, SuperClassic, and Classic architectures. Backup options include online backups and dumps, as well as incremental backup with partly supported point-in-time recovery. Drivers include Java JDBC,.NET, Python, ODBC, PHP, Delphi, and C++ Builder. Free community support is available through mailing lists, alongside commercial and special support. Firebird lists versions 5.0.4, 4.0.7, and 3.0.14 as latest in their series; versions 2.5 and earlier are discontinued and no longer maintained. The enterprise subscription is €199 a month, billed from €199/month/1 servers.