Best Self-hosted Alternatives to NinjaOne

PatchMon is a Linux patch monitoring automation platform that centralizes patch management across diverse server environments. Agents communicate outbound-only to the PatchMon server, eliminating inbound ports on monitored hosts while providing comprehensive visibility and automated remediation capabilities.

Key Features

• Customizable dashboard with per-user card layout and ordering
• Multi-user accounts with roles and RBAC
• Host inventory with OS details and host groups
• Package inventory across hosts, with outdated counts and per-host repositories
• Agent version management and script content stored in the database
• Server configuration options including URL, protocol, host, and port plus signup toggle and default user role
• REST API under /api/v1 with JWT authentication
• Proxmox LXC auto-enrollment to discover and enroll containers
• Outbound-only agent model with rate limiting for security
• Docker deployment with one-line self-host installer, systemd backend, and nginx vhost with optional TLS

Use Cases

• Central patch management for Linux servers across on-premises and cloud environments
• Automatic enrollment and patching of Proxmox LXC containers
• Self-hosted patch monitoring integrated with automation and API-driven workflows

Conclusion

PatchMon provides centralized visibility into patch posture with a secure, self-hosted architecture and an API-driven workflow for automation and integrations. Its Docker-based deployment, outbound agent model, and REST API support scalable patch management across diverse environments.

Squirrel Servers Manager (SSM) is an all-in-one, UI-focused tool for managing servers, configurations, and containers. It is designed to be agentless and operates over SSH, combining Ansible-driven configuration automation with Docker management and monitoring.

Key Features

• Agentless server management over SSH (no host agents required)
• Ansible playbook management and execution (local and remote playbooks)
• Docker container visibility with basic statistics and update notifications
• Metrics and statistics for hosts (CPU, RAM, and more) with anomaly detection
• Automation triggers based on events such as playbook runs and container actions
• Secrets handling designed around Ansible Vault and bcrypt-based credential storage
• “Collections” to install open-source services on managed devices with one click

Use Cases

• Homelab or small-fleet operations for managing Linux hosts and Docker workloads from a single UI
• Standardizing server configuration via Ansible playbooks with auditable execution
• Lightweight monitoring and operational automation without deploying agents

Limitations and Considerations

• The project is described as an alpha/work-in-progress and may not be production-ready
• Some integrations are listed as planned/coming soon rather than fully available

SSM is a good fit for teams and individuals who want an approachable interface for Ansible and Docker workflows while keeping deployments agentless. It aims to cover day-to-day operations like deployment, monitoring, and automation from one dashboard.