Yes, we do! We work with many clients running multisite installations. If your multisite installation has 5 domains or less we can fully manage the full multisite install on a Custom Pro Plan.
For multisites running more than 5 domains, we can fully manage your installation under one of our Enterprise Plans. Hop on a call with us to talk through your options. We'll gather all of the information we need to make sure you're on the right plan so that our team can fully support all updates, security, and speed optimizations for your multisite.