NetLock RMM is an independently developed open source project from Germany, released under AGPL-3.0 with an active v2.6.x release cadence and a growing GitHub community (326+ stars). It is genuinely open source — the full source is on GitHub, the Community Edition is free, and self-hosting is first-class. For EU teams prioritizing data sovereignty, the German origin and air-gapped deployment support are meaningful differentiators.
The platform does a lot right: multi-tenancy with granular role-based permissions, remote shell and screen control, antivirus and firewall monitoring, security baseline enforcement, whitelabel out of the box, SSO and MFA, and a .NET + MySQL stack that deploys cleanly via Docker or Kubernetes. For shops inside the 25-device limit, it is a legitimate free alternative to commercial RMM.
Where Breeze fits differently is scope and compliance. NetLock's Community Edition caps at 25 devices — beyond that, you are on the Professional tier (€55/month) or cloud. Breeze's self-hosted edition has no device cap, ships 44 modules (including SNMP, network discovery, CVE correlation, backup verification, and full CIS Controls automation across 13 of 18 controls), and includes an optional AI brain for investigation and remediation. Both projects share the AGPL-3.0 license and the open source values underneath; they differ on scope and how the free tier is drawn.