The short answer is no, Zircon3D is designed to run locally.

Local Operation

All core functionality of Zircon3D runs locally inside your Home Assistant add-on, including:

• 3D floorplan modeling
• Real-time data visualization
• Heatmaps and dashboards
• Sensor monitoring
• Device interaction and controls

Zircon3D reads data directly from your Home Assistant instance, so your monitoring and visualization continue to work even without external services.

Your data and floorplans remain stored locally on your system.

Zircon3D Account and Licensing

To use Zircon3D, you will need a Zircon3D online account.
This account is used for license management.

Normally, the add-on performs a quick online license verification.

Offline Activation

If your system does not have internet access, Zircon3D can still be activated.

You can generate a manual license token from the Zircon3D website and paste it into the add-on to activate your license.

This allows Zircon3D to continue operating in restricted or offline environments.

Optional Cloud Backup for Floorplans

Zircon3D also provides an optional cloud backup for your floorplan projects.

If enabled, your floorplan design can be uploaded to the cloud, which helps prevent data loss if you reinstall Home Assistant or move to another system.

Important to note:

• Only floorplan project data is stored in the cloud
• Sensor data and Home Assistant data are never uploaded
• Visualization still reads live data directly from Home Assistant

You can learn more about local vs cloud mode in this article:

https://forum.zircon3d.com/topic/9/explained-zircon3d-local-vs-cloud-mode

Summary

• 3D rendering and visualization run locally
• Data comes directly from Home Assistant
• Your monitoring data stays inside Home Assistant
• A Zircon3D account is required for licensing
• Offline activation is supported
• Optional cloud backup for floorplan projects

This design keeps Zircon3D aligned with the local-first philosophy of the Home Assistant ecosystem while still providing optional convenience features.