Example hosting company uptime seal.
Netcraft has developed several services whereby companies can have access to detailed information on the performance of their prospects’ sites or their own sites, including timely notification of outages and the facility to compare and rank performance of the monitored sites. Prompt notification of outages means that sales approaches can be exceptionally well timed. Measurements can be presented to prospects and customers as a justification for price differential, and also serve as an objective in house metric to judge performance relative to competitors.
Netcraft’s Dedicated Server Monitoring service combines web server vulnerability scanning, network performance monitoring and site outage alerting into one low cost package. 
Hosting service providers can have access to detailed information on the present performance of their prospects’ sites, including timely notification of outages and the facility to compare and rank performance of the monitored sites.