This website tries to provide guidance on several topics regarding Software-as-a-Service applications. First, we provide guidance for security and privacy challenges regarding a new and existing publisher - SaaS provider, both from and end user perspective (the SaaS platform being hosted in the cloud) as from a provider perspective. Secondly, we offer guidelines on securing the applications and services themselves, from the perspective as a software vendor : considerations on software development, authentication and identity, publishing and licensing, software protection, reverse engineering protection, application server security, (in) payment processing, key management, etc. Finally, we try to provide guidelines for developing SaaS models for security vendors which are becoming part of the architecture of the cloud itself, similar to traditional security.