Meridian

See and control supported smart-home devices from one desktop app. Meridian stores its own data on your hardware.

Download Meridian See How It Works

Available for macOS, Windows, and Linux · macOS 0.1.0+4

One view of a messy smart home

Meridian puts rooms, cameras, devices, scenes, events, and alerts on one desktop.

See what’s going on
Cameras, lights, locks, sensors, and scenes grouped by area—living room, garage, office.
Supported services and devices
Home Assistant, Tuya, Alexa, Arlo Cloud, plus gear Meridian finds on your local network.
Runs on your network
Meridian keeps its own data locally. Some provider integrations still talk to that provider’s cloud.
Scenes and alerts
Build routines and keep an eye on motion, doors, events, and failures from one place.

Start on one computer. Add an always-on hub when you need it.

Meridian can run by itself on your computer or connect to Meridian Runtime for a whole-house setup.

Use Meridian on one computer

Connect supported smart-home services directly from the desktop app. No separate server is required.

Browse rooms, devices, and cameras
Run scenes and control supported devices
Keep Meridian’s data on that computer

Run Meridian for the whole house

Meridian Runtime can stay on an always-on computer and serve other devices on your home network.

Keep automations available when your desktop app is closed
Connect supported providers and notifications in one place
Let additional Meridian clients join over the home network

What Meridian connects to

Support varies by provider and device. Some connections stay entirely on your network; others rely on the provider’s own service.

Home Assistant

Bring Home Assistant rooms, entities, and controls into Meridian.

Tuya

Connect compatible Tuya devices through the provider integration.

Amazon Alexa

Link compatible Alexa Smart Home devices after granting Amazon permission.

Arlo Cloud

Connect compatible Arlo cameras and security devices through the Arlo cloud integration.

Local network

Find supported equipment through Meridian’s LAN discovery.

Meridian is local-first, but it cannot make a cloud-based device local. When an integration depends on Home Assistant, Tuya, Amazon, Arlo, or another provider, that provider’s own connection and privacy terms still apply.

View compatibility details Ask about a device

Screenshots

Click any screenshot to open the full-size view.

Dashboard · Device health and recent activity.
Resources · Devices and services in one list.
Scenes · Routines you can run when you need them.
Events · What happened, and when.
Topology · How systems and devices connect.
Alerts · Failures and odd activity.

What “local-first” means here

Meridian runs on hardware you control and keeps its application data there. You do not have to send your entire home through an ncdLabs-hosted control service.

Local application data

Meridian keeps its configuration and synchronized device information on the computer or Meridian Runtime you operate.

Choose where Meridian Runtime runs

If you add Meridian Runtime, you choose the computer that runs it and the clients allowed to connect.

What connected providers receive

Cloud-based providers may still receive requests and data needed to operate their integrations.

This marketing page uses Google Analytics to measure page visits and download clicks. Those website analytics do not include your Meridian configuration or smart-home device data.

Read about Meridian privacy Amazon connection notice Ask a privacy question

From download to first device

Meridian can start as a desktop-only setup. Add the household runtime later if you need it.

Step 1

Install Meridian

Download the DMG, move Meridian to Applications, and open it on your Mac.

Step 2

Connect a provider

Add a supported smart-home service or discover supported equipment on your network.

Step 3

Organize your home

Review rooms and devices, then create the scenes and alerts you want to use.

Open the getting-started guide

Platform availability

Available now

macOS

Universal desktop build for Apple silicon and Intel Macs.

Available now

Windows

64-bit ZIP for Windows 10 and later.

Available now

Linux

x86_64 AppImage and Debian package.

In development

iPhone and iPad

No public App Store download yet.

Download Meridian

Current build: macOS 0.1.0+4 (Windows and Linux remain 0.1.0+3). Choose the installer for your platform.

Verify the downloads

The macOS app inside the DMG was verified as signed by Developer ID Application: Louis Grossi (JGJLGZQT48) and passed a strict code-signature check.

macOS DMG SHA-256
a3890112cab80e499635ee95d5dfc6ccea36ab07d6d2464d1e038feb58c9ae19

Linux AppImage SHA-256
52daef79cb03425dcfcbd0640867e80dcdc04c300433bd1ce5120339690e6ef7

Linux DEB SHA-256
1e90cdb776f2dc025c69b2a25e5512b2f69e6382931304933a3516e48d293fec

Windows ZIP SHA-256
6843df5e50124c82fa0de1758f106b853e46b6298301ae4ff893ded62f9340b9

Read the release notes Installation guide

Questions before you install

Do I need a Meridian cloud account?

You can run Meridian on your own computer or Meridian Runtime. Connected providers may require their own accounts.

Does every integration work without the internet?

No. Meridian can keep its own data and runtime local, but integrations built on a provider’s cloud still need that provider’s service.

How do I install it?

Choose the download for macOS, Windows, or Linux, then follow the installation guide for your platform.

Is Meridian a replacement for Home Assistant?

Not necessarily. Meridian can connect to Home Assistant and provide a separate desktop view. You can also use Meridian with other supported providers and local discovery.

Where are the mobile versions?

iPhone and iPad builds are in development and are not available for public App Store download yet.