A Stack (Mini, Small, Medium, or Large) provides two environments, one for production and one for testing. Agencies can request one or more additional environments for development/testing purposes. Agencies can also request customised stacks with different attributes and choose optional extras to suit their specific requirements.
Excluding the Mini, all Stacks include 24/7 helpdesk with phone and web-based contact. Website uptime is measured against a monthly 99.7% uptime service level agreement.