Carto (CartoDB)
You can add a MapVault layer to Carto using a MapVault Tile Layer
NOTE: You will only be able to share the map with users on the same network as teh MapVault Tile layers are restricted to the subscription IP Address
Go to https://<youraccount>.carto.com/dashboard#
Click on
on top right corner
Click on 
Click on 
Move the Source slider to
and click on it
Click on the
button on the Style dialog
Copy and paste the relevant URL from Tile Layers into the URL dialog

Click on the 

For further information in viewing MapVault tile sets using Carto please visit the Carto Help page