Private networking support is provided at no cost. Traffic over private networks is free and doesn’t accounts against your bandwidth billing transfer limit.
Private networking is available in every region.
DigitalOcean private networking currently restricts communication to Droplets within the same datacenter. A planned update for 2018 will restrict private network communication to resources within a single account or team, increasing its security.
All Droplets with private networking enabled will continue to be able to communicate with the other Droplets within the same account or team. Droplets will not be able to use the private network to communicate with Droplets that belong to a different team or account.
Private networking isolation will go into effect incrementally in the month of July. For more information, see the private networking change announcement