This white paper compares deploying secure web gateways as software or appliances on-premises vs. as a cloud-based service. Lower cost, fast implementation, rapid scalability and less administration are all good reasons to adopt SaaS. Cloud-based secure Web gateways can also provide better security and faster performance than appliances or local servers. It discusses a number of advantages that appliances cannot match, such as:Better defense against zero-day threats and spam servers; more comprehensive signatures and URL databases.”]