FireDaemon Zero 4 is available under two licensing models: a standard license for home, business, and enterprise users, and an OEM license for integrators and developers. Standard licenses are perpetual and priced per machine, starting at $50.00, with volume discounts for 2 or more licenses. Maintenance subscriptions are no longer available. The OEM license is priced at $2,000.00, includes a first-year support subscription, and permits royalty-free redistribution rights.

The FireDaemon Zero compatibility matrix maps Microsoft Windows operating system versions to specific Zero and Zero OEM software versions. It covers Zero 3 and Zero 4 across both 32-bit and 64-bit systems. Zero 4 is the current and final release, while Zero 3 is still supported but no longer maintained. The matrix uses three statuses: Compatible/Supported, Compatible/Unsupported (typically due to the OS reaching end of support or incompatibilities), and Incompatible/Unsupport

The FireDaemon Zero changelog documents the complete version history of Zero and Zero OEM, from the original Session 0 Viewer 1 release in 2015 through to the current Zero 4 series. Each entry lists new features, improvements, bug fixes, and security updates. Zero 4 is the current actively maintained release, Zero 3 is end of development, and Zero 2 is end of life with no support. The changelog uses four markers to categorise changes: N for new, I for improvement, F for fix,

We've shipped updates to all three FireDaemon products. Pro 6.3.5 adds Service Auditing, Windows Server 2025 dMSA support, bulk password rotation, 3x faster service definition loading, and a raft of UI and reliability fixes. Fusion 8.1.6 ships with OpenSSL 3.6.1. Zero 4.0.8 gets a toolchain update. All available now with 30-day free trials. Free update to existing customers and customers with software assurance subscriptions.