NetLock RMM Review: A Truly Open-Source RMM Worth Deploying in 2026

The open-source RMM space has a problem. Most tools that call themselves “free” come with strings attached: device caps, feature gates, or the classic bait-and-switch where “open-source” really means “open-core with all the good stuff behind a paywall.” NetLock RMM takes a different approach. Built by a solo German developer with public government funding, this self-hosted RMM gives you full access to every feature for up to 25 devices, with no cloud dependency and no telemetry phoning home.

We first reviewed NetLock back in August 2025, and the project has matured significantly since then. New remote desktop capabilities, an interactive deployment guide, policy management, and a live demo have turned what was already a promising tool into a serious contender. Here is our updated take on where NetLock RMM stands in 2026.

What Is NetLock RMM?

NetLock RMM is a fully open-source Remote Monitoring and Management platform designed for IT professionals, MSPs, and sysadmins who want complete control over their infrastructure. The source code lives on GitHub, built primarily in C#, Blazor, ASP.NET Core, and SignalR.

Unlike cloud-first competitors that funnel all your data through their servers, NetLock runs entirely on your own infrastructure. Every agent connection, every script execution, every alert stays within your network. For regulated industries or privacy-conscious teams, that distinction matters.

The project is developed by 0x101 Cyber Security, and it stands out for a few reasons: cross-platform support (Windows, Linux, macOS on both x64 and ARM64), Docker and Kubernetes deployment, and a growing feature set that now rivals tools costing ten times as much.

Key Features

NetLock has grown well beyond basic monitoring since its initial release. Here is what the platform offers today.

Remote Access and Control

This is where NetLock made the biggest leap. The platform now includes full remote screen control for Windows and Linux, with an experience comparable to TeamViewer:

Session and display switching
Unattended and attended access modes
Built-in session recording
Ctrl+Alt+Del support for elevated access
User chat interface for end-user communication
Input-as-keystrokes for automating password entry

On top of that, you get interactive remote shells (PowerShell, Bash, Zsh), bidirectional file transfers, and process/service management directly from the console.

Monitoring and Alerts

NetLock covers the monitoring essentials and then some:

CPU, RAM, and disk threshold triggers
Windows Event Log monitoring
Service status monitoring
Ping-based availability checks
Custom sensors via PowerShell, Bash, Zsh, and RegEx

Notifications reach you through email, Microsoft Teams, Telegram, or ntfy.sh. If your preferred channel is not listed, the open-source nature means you can extend it.

Automation and Jobs

Schedule and run scripts across your fleet using PowerShell, Bash, or Zsh. Jobs can target individual devices, groups, or entire tenants. Combined with the integrated file server, you can host your favorite tools within NetLock and reference them directly in your scripts, cutting out the need for external file hosting.

Multi-Tenancy and Access Control

For MSPs managing multiple clients, NetLock supports full multi-tenancy with location-based and group-based device organization. Role-based access control lets you restrict what each technician can see and do, down to specific panels like remote shell or device authorization. Two-factor authentication adds another layer of protection.

Policy Management

A newer addition: define and enforce policies across your fleet. Set antivirus configurations, notification rules, sensor thresholds, and job schedules at the policy level, then apply them to groups or tenants. Changes propagate automatically.

Inventory and Security

Software and hardware inventory tracking gives you visibility into what is running across your endpoints. Microsoft Defender Antivirus management is built in, letting you monitor and control Defender settings from the NetLock console. The centralized dashboard surfaces statistics and unread events at a glance.

Custom User Tray Icon

NetLock now supports a white-labeled tray icon on end-user machines. You can customize the logo, interface text, and add action buttons that open websites or execute shell commands. The built-in chat interface lets you communicate with users directly, which is a nice touch for support teams that want branded tooling without building it from scratch.

Getting Started: Deployment in Minutes

NetLock has invested heavily in making deployment painless. The recommended path is Docker-based, and the project now offers an interactive installation guide that walks you through every step.

Prerequisites

A Linux server (Ubuntu 22.04+ recommended) or any Docker-capable host
Docker and Docker Compose installed
A domain name pointed at your server
A reverse proxy (Traefik, Nginx, or Cloudflare Tunnel)

Installation

Head to members.netlockrmm.com/install for the guided setup. The installer generates a tailored Docker Compose configuration based on your environment. If you prefer the manual route, the documentation provides a complete Docker Compose setup with Traefik and MySQL.

An experienced sysadmin can have NetLock running in under 10 minutes. If you are new to Docker, budget 30 minutes and follow the beginner’s guide.

Agent Deployment

Once the server is up, agent deployment is straightforward:

Log in to the web console
Generate OS-specific installers (Windows, Linux, macOS)
Deploy agents to your endpoints
Devices appear in the dashboard automatically

The agent-server handshake includes a security verification step that prevents unauthorized connections. Optional code signing for executables adds trust when deploying to managed environments.

Pricing and Free Tier

NetLock offers one of the more generous free tiers in the open-source RMM space:

Plan	Price	Devices	Hosting
Free	$0	Up to 25	Self-hosted
Unlimited Self-Hosted	50 EUR/month	Unlimited	Self-hosted
Unlimited Cloud-Hosted	60 EUR/month	Unlimited	NetLock-hosted

The free tier includes every feature. No artificial limitations, no premium-only capabilities. Twenty-five devices covers most home labs, small businesses, and evaluation scenarios.

For larger deployments, the paid plans remove the device cap. At 50 EUR/month for unlimited self-hosted devices, the pricing undercuts most commercial RMMs by a wide margin. Compare that to ConnectWise or Datto, where per-agent costs can easily exceed $3/device/month.

NetLock vs TacticalRMM vs Action1 vs Level.io

How does NetLock stack up against the other free and open-source RMM options we have reviewed?

Feature	NetLock RMM	TacticalRMM	Action1	Level.io
License	Open-source (full)	Open-source (core)	Proprietary	Proprietary
Hosting	Self-hosted	Self-hosted	Cloud only	Cloud only
Free Tier	25 devices	Unlimited (self-hosted)	200 endpoints	2 devices
Windows	Yes	Yes (primary)	Yes	Yes
Linux	Yes	Community scripts	No	Yes
macOS	Yes	Community scripts	No	Yes
Remote Desktop	Yes (built-in)	Via MeshCentral	No	Yes
Multi-Tenancy	Yes	Yes	No	Yes
Code Signing	Optional (included)	$50/month sponsorship	N/A	N/A
Deployment	Docker + interactive guide	Script-based	Cloud (no setup)	Cloud (no setup)
Data Sovereignty	Full (self-hosted)	Full (self-hosted)	Vendor servers	Vendor servers

The takeaway: NetLock offers the best balance of open-source purity, cross-platform support, and self-hosting capability. TacticalRMM wins on free device count but lags on Linux/macOS support. Action1 excels at patching but locks you into their cloud. Level.io offers a polished experience but the free tier is too limited at just 2 devices.

Security Architecture

Self-hosting is not just about cost savings. It is a security posture decision.

With NetLock, agent communication stays internal to your network. Place the server behind a reverse proxy and you integrate it with your existing security stack: TLS termination, Web Application Firewalls, or Cloudflare tunnels. No credentials or metrics pass through a third-party vendor’s infrastructure.

The platform supports two-factor authentication for console access, role-based permissions to limit technician capabilities, and a controlled agent-server handshake that prevents rogue agents from connecting. For organizations in regulated industries, this setup simplifies data residency compliance significantly.

NetLock can also operate in fully isolated or air-gapped environments, which is a requirement for certain government and defense applications that cloud-only RMMs simply cannot meet.

Pros and Cons

What we like:

Genuinely open-source with full feature access on the free tier
Cross-platform agents (Windows, Linux, macOS, x64, ARM64)
Built-in remote desktop without third-party dependencies
Interactive deployment guide makes setup accessible
Active development with frequent releases
Self-hosted means complete data sovereignty
Competitive pricing for unlimited devices
White-labeled tray icon for professional MSP branding

Where it falls short:

Solo developer project. Community is growing, but bus factor is real
UI has improved but still feels utilitarian in places
Smaller ecosystem than established commercial RMMs
Documentation is solid but still catching up to the feature pace
No mobile app yet (listed as work in progress)
Fewer integrations than mature platforms like ConnectWise

Who Should Use NetLock RMM?

Ideal for:

Small MSPs managing 10-100 devices who want to avoid per-seat licensing
Internal IT teams at small businesses who need monitoring without a big budget
Privacy-conscious organizations in regulated industries (healthcare, finance, government)
Sysadmins managing a mix of Windows, Linux, and macOS endpoints
Home labbers who want a real RMM without paying for it

Not ideal for:

Large enterprises needing 1,000+ agent deployments with guaranteed SLAs
Teams that want zero infrastructure management. Cloud-only solutions like Action1 are simpler if you do not want to maintain a server
Organizations needing extensive third-party integrations. The integration ecosystem is still developing

Verdict

NetLock RMM has gone from “interesting project to watch” to “genuine production-ready tool” in under a year. The addition of remote desktop, policy management, and the interactive deployment guide addressed the biggest gaps from our first review.

Is it perfect? No. The solo-developer risk is real, and you will not find the polish of a $50/seat commercial platform. But for the price (free for 25 devices, 50 EUR/month for unlimited), you get a self-hosted RMM with cross-platform support, built-in remote access, and complete data sovereignty.

If you are an MSP or sysadmin tired of watching your RMM costs climb, give NetLock a try. The free tier is generous enough to evaluate properly, and the live demo lets you explore the console before committing to a deployment.

For more open-source RMM options, check out our reviews of TacticalRMM, Action1, and Level.io.

Exploring your options? See how NetLock RMM stacks up in our roundup of the best free RMM tools in 2026.